{"id":30997,"date":"2022-11-07T08:46:26","date_gmt":"2023-07-03T18:51:29","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%b0%86json%e8%bd%ac%e6%8d%a2%e4%b8%bajava%ef%bc%8c%e5%b0%86java%e8%bd%ac%e6%8d%a2%e4%b8%bajson-%e3%80%9c%e4%bd%bf%e7%94%a8gson%e5%92%8cjackson%e7%9a%84%e6%96%b9%e6%b3%95\/"},"modified":"2025-08-12T21:47:37","modified_gmt":"2025-08-12T13:47:37","slug":"%e3%80%90java%e3%80%91%e5%b0%86json%e8%bd%ac%e6%8d%a2%e4%b8%bajava%ef%bc%8c%e5%b0%86java%e8%bd%ac%e6%8d%a2%e4%b8%bajson-%e3%80%9c%e4%bd%bf%e7%94%a8gson%e5%92%8cjackson%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%b0%86json%e8%bd%ac%e6%8d%a2%e4%b8%bajava%ef%bc%8c%e5%b0%86java%e8%bd%ac%e6%8d%a2%e4%b8%bajson-%e3%80%9c%e4%bd%bf%e7%94%a8gson%e5%92%8cjackson%e7%9a%84%e6%96%b9%e6%b3%95\/","title":{"rendered":"\u3010Java\u3011\u5c06JSON\u8f6c\u6362\u4e3aJava\uff0c\u5c06Java\u8f6c\u6362\u4e3aJSON \u301c\u4f7f\u7528GSON\u548cJackson\u7684\u65b9\u6cd5\u301c"},"content":{"rendered":"

\u7b80\u800c\u8a00\u4e4b\uff0c\u53ea\u9700\u8981\u4e00\u79cd\u9009\u62e9\u3002\u5728\u4f7f\u7528Java\u8fdb\u884cWeb API\u65f6\uff0c\u5e38\u5e38\u4f7f\u7528\u7684JSON\u2192Java\u3001Java\u2192JSON\u7684\u65b9\u6cd5\u8fdb\u884c\u603b\u7ed3\u3002
\n\u6b64\u5916\uff0c\u5173\u4e8e\u5982\u4f55\u5c06JSON\u8fdb\u884cHTTP POST\u6216HTTP GET\u7684\u65b9\u6cd5\u5c06\u5728\u4e0b\u4e00\u7bc7\u6587\u7ae0\u4e2d\u8fdb\u884c\u603b\u7ed3\u3002<\/p>\n

\u3010\u672c\u7a3f\u3011Java\u3067JSON\u3092\u6271\u3046\u65b9\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059<\/p>\n

JSON\u3092Java\u306b\u5909\u63db(\u30c7\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba)\u3001Java\u3092JSON\u306b\u5909\u63db(\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba)\u3059\u308b\u3084\u308a\u65b9\u306f2\u901a\u308a\u8aac\u660e\u3057\u307e\u3059<\/p>\n

\u30e9\u30a4\u30d6\u30e9\u30ea\u306bGSON\u3092\u4f7f\u3046\u3084\u308a\u65b9
\n\u30e9\u30a4\u30d6\u30e9\u30ea\u306bJackson\u3092\u4f7f\u3046\u3084\u308a\u65b9<\/p>\n

\u3010\u6b21\u7a3f\u3011Java\u3067HTTP\u901a\u4fe1\u3067JSON\u3092POST\u3057\u305f\u308a\u3001GET\u3057\u305f\u308a\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u3082\u307e\u3068\u3081\u307e\u3059<\/p>\n

Java\u3067HTTP\u901a\u4fe1\u3092\u3059\u308b\u3084\u308a\u65b9\u30822\u901a\u308a\u8aac\u660e\u3057\u307e\u3059<\/p>\n

OkHttp3\u3092\u4f7f\u3063\u305f\u3084\u308a\u65b9
\nJava\u6a19\u6e96\u30d1\u30c3\u30b1\u30fc\u30b8\u3067\u3042\u308bHttpUrlConnection\u3092\u4f7f\u3063\u305f\u3084\u308a\u65b9<\/p>\n

\u4ee5JSON\u4e3a\u57fa\u7840\u601d\u8003\u7684\u6700\u77ed\u8def\u5f84\u5728\u8c03\u7528\u5916\u90e8API\u65f6\uff0c\u5982\u679c\u5df2\u7ecf\u5b58\u5728\u8981\u89e3\u6790\u7684JSON\u5b57\u7b26\u4e32\uff0c\u5219\u8003\u8651\u4f7f\u7528\u6700\u77ed\u8def\u5f84\u3002\u53ef\u4ee5\u5229\u7528\u81ea\u52a8\u751f\u6210\u6a21\u578b\u7c7b\u7684\u7f51\u7ad9\uff0c\u53ea\u8981\u6709JSON\u5b57\u7b26\u4e32\u5373\u53ef\uff08\u5982\u679c\u6709JSON schema\u66f4\u597d\uff09\u3002<\/p>\n
{<\/span>\r\n    \"person\"<\/span>:<\/span> {<\/span>\r\n        \"firstName\"<\/span>:<\/span> \"John\"<\/span>,<\/span>\r\n        \"lastName\"<\/span>:<\/span> \"Doe\"<\/span>,<\/span>\r\n        \"address\"<\/span>:<\/span> \"NewYork\"<\/span>,<\/span>\r\n        \"pets\"<\/span>:<\/span> [<\/span>\r\n            {<\/span>\"type\"<\/span>:<\/span> \"Dog\"<\/span>,<\/span> \"name\"<\/span>:<\/span> \"Jolly\"<\/span>},<\/span>\r\n            {<\/span>\"type\"<\/span>:<\/span> \"Cat\"<\/span>,<\/span> \"name\"<\/span>:<\/span> \"Grizabella\"<\/span>},<\/span>\r\n            {<\/span>\"type\"<\/span>:<\/span> \"Fish\"<\/span>,<\/span> \"name\"<\/span>:<\/span> \"Nimo\"<\/span>}<\/span>\r\n        ]<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
GSON\u548cJackson\u5728Java\u4e2d\u8fdb\u884cJSON\u64cd\u4f5c\u65f6\uff0c\u5e38\u5e38\u4f7f\u7528\u4e24\u4e2a\u5e93\uff0c\u5373GSON\u548cJackson\u3002
\n\u7531\u4e8e\u65e0\u6cd5\u4e00\u6982\u800c\u8bba\u54ea\u4e2a\u66f4\u597d\uff0c\u56e0\u6b64\u9700\u8981\u5bf9\u4e24\u8005\u8fdb\u884c\u8bf4\u660e\u3002<\/p>\n
\"image.png\"<\/p>\n
\"image.png\"<\/p>\n
GSON\u7f16\u7a0b\u5e93<\/p>\n
\u4f7f\u7528GSON\u5c06JSON\u6620\u5c04\u5230Java\u4e2d\u3002\u9996\u5148\u4eceGSON\u5f00\u59cb\u3002\u8003\u8651\u5230JSON\uff0c\u4e5f\u5c31\u662f\u4ece\u539f\u59cb\u7684JSON\u5b57\u7b26\u4e32\u4e2d\u521b\u5efa\u4e00\u4e2aJava\u89e3\u6790\u5668\uff0c\u6211\u4eec\u53ef\u4ee5\u5c1d\u8bd5\u4f7f\u7528jsonschema2pojo\uff0c\u8fd9\u6837\u6bd4\u8f83\u65b9\u4fbf\u3002<\/p>\n
\u672c\u7ae0\u7684\u6e90\u4ee3\u7801\u5728\u8fd9\u91cc\uff1a
\nhttps:\/\/github.com\/riversun\/java-json-gson-jackson-http\/tree\/master\/src\/main\/java\/com\/example\/gson<\/p>\n
GSON\u7684\u5e93\u4f9d\u8d56\u5173\u7cfbGSON\u7684\u5e93\u6307\u5b9a\u65b9\u6cd5\u5982\u4e0b\u6240\u793a<\/p>\n
\u25a0 GSON\u7684\u6700\u65b0\u5e93(maven\u4ed3\u5e93)
\nhttps:\/\/mvnrepository.com\/artifact\/com.google.code.gson\/gson<\/p>\n
\u25a0 \u4e00\u4e2a\u4f7f\u7528GSON\u5e93\u7684Maven\u914d\u7f6e\u793a\u4f8b<\/p>\n
<dependency><\/span>\r\n    <groupId><\/span>com.google.code.gson<\/groupId><\/span>\r\n    <artifactId><\/span>gson<\/artifactId><\/span>\r\n    <version><\/span>2.8.5<\/version><\/span>\r\n<\/dependency><\/span>\r\n<\/code><\/pre>\n
\u25a0 GSON\u7684gradle\u914d\u7f6e\u793a\u4f8b<\/p>\n
compile<\/span> 'com.google.code.gson:gson:2.8.5'<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528jsonschema2pojo\u81ea\u52a8\u751f\u6210\u6a21\u578b\u7c7b\uff08POJO\uff09\u3002\u8bf7\u8bbf\u95ee\u4ee5\u4e0b\u7f51\u7ad9\uff0c\u5728\u4e0a\u65b9\u7c98\u8d34JSON\u5185\u5bb9\uff1a
\nhttp:\/\/www.jsonschema2pojo.org\/<\/p>\n
\u5982\u679c\u5bf9\u5916\u90e8\u7f51\u7ad9\u6709\u62b5\u6297\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5e93\u6765\u81ea\u884c\u5b8c\u6210\u3002<\/p>\n
\"image.png\"\u5728\u7f51\u7ad9\u4e0a\u8fdb\u884c\u4ee5\u4e0b\u8bbe\u7f6e\uff0c\u5f53\u70b9\u51fb\u201cZip\u201d\u65f6\uff0c\u5c06\u4f1a\u81ea\u52a8\u751f\u6210\u6a21\u578b\u7c7b\u3002<\/p>\n
\u5305\uff1acom.example.gson\uff08\u5305\u540d\uff0c\u53ef\u4ee5\u662f\u4efb\u4f55\u540d\u5b57\uff0c\u4f46\u6e90\u4ee3\u7801\u5c06\u81ea\u52a8\u751f\u6210\u4e0e\u8be5\u5305\u540d\u76f8\u5173\u7684\u4ee3\u7801\uff09
\n\u7c7b\u540d\uff1aModel\uff08POJO\u6700\u9876\u5c42\u7684\u7c7b\u540d\uff09
\n\u76ee\u6807\u8bed\u8a00\uff1aJava
\n\u6e90\u7c7b\u578b\uff1aJSON\uff08\u4eceJSON\u5b57\u7b26\u4e32\u4e2d\u63a8\u6d4b\u51fa\u6a21\u578b\u7c7b\uff09
\n\u6ce8\u91ca\u98ce\u683c\uff1aGson\uff08\u4f7f\u7528GSON\u8fdb\u884c\u89e3\u6790\uff09
\n\u2611 \u5141\u8bb8\u989d\u5916\u5c5e\u6027\uff08\u5373\u4f7fJSON\u4e2d\u6df7\u6709\u672a\u77e5\u5c5e\u6027\u4e5f\u53ef\u4ee5\uff09<\/p>\n
\u751f\u6210\u4e00\u4e2aZip\u6587\u4ef6\uff0c\u4e0b\u8f7d\u5e76\u6253\u5f00\u540e\uff0c\u4f1a\u81ea\u52a8\u751f\u6210\u4ee5\u4e0b\u4e09\u4e2aJava\u6587\u4ef6\u3002<\/p>\n
(2) \u67e5\u770b\u81ea\u52a8\u751f\u6210\u7684\u6a21\u578b\u7c7b\uff08POJO\uff09
\n\u25a0 Model.java\uff1a\u9876\u5c42\u7c7b<\/p>\n
package<\/span> com.example.gson<\/span>;<\/span>\r\nimport<\/span> com.google.gson.annotations.Expose<\/span>;<\/span>\r\nimport<\/span> com.google.gson.annotations.SerializedName<\/span>;<\/span>\r\npublic<\/span> class<\/span> Model<\/span> {<\/span>\r\n    @SerializedName<\/span>(<\/span>\"person\"<\/span>)<\/span>\r\n    @Expose<\/span>\r\n    public<\/span> Person<\/span> person<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
Person.java\u4e2d\u7684”pets”:[]\u8fd9\u6837\u7684\u6570\u7ec4\u6307\u5b9a\u4f1a\u53d8\u6210\u4e00\u4e2aList\u3002<\/p>\n
package<\/span> com.example.gson<\/span>;<\/span>\r\nimport<\/span> java.util.List<\/span>;<\/span>\r\nimport<\/span> com.google.gson.annotations.Expose<\/span>;<\/span>\r\nimport<\/span> com.google.gson.annotations.SerializedName<\/span>;<\/span>\r\npublic<\/span> class<\/span> Person<\/span> {<\/span>\r\n    @SerializedName<\/span>(<\/span>\"firstName\"<\/span>)<\/span>\r\n    @Expose<\/span>\r\n    public<\/span> String<\/span> firstName<\/span>;<\/span>\r\n    @SerializedName<\/span>(<\/span>\"lastName\"<\/span>)<\/span>\r\n    @Expose<\/span>\r\n    public<\/span> String<\/span> lastName<\/span>;<\/span>\r\n    @SerializedName<\/span>(<\/span>\"address\"<\/span>)<\/span>\r\n    @Expose<\/span>\r\n    public<\/span> String<\/span> address<\/span>;<\/span>\r\n    @SerializedName<\/span>(<\/span>\"pets\"<\/span>)<\/span>\r\n    @Expose<\/span>\r\n    public<\/span> List<\/span><<\/span>Pet<\/span>><\/span> pets<\/span> =<\/span> null<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u25a0 \u5ba0\u7269.java<\/p>\n
package<\/span> com.example.gson<\/span>;<\/span>\r\nimport<\/span> com.google.gson.annotations.Expose<\/span>;<\/span>\r\nimport<\/span> com.google.gson.annotations.SerializedName<\/span>;<\/span>\r\npublic<\/span> class<\/span> Pet<\/span> {<\/span>\r\n    @SerializedName<\/span>(<\/span>\"type\"<\/span>)<\/span>\r\n    @Expose<\/span>\r\n    public<\/span> String<\/span> type<\/span>;<\/span>\r\n    @SerializedName<\/span>(<\/span>\"name\"<\/span>)<\/span>\r\n    @Expose<\/span>\r\n    public<\/span> String<\/span> name<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528GSON\u5e93\uff0c\u5c06JSON\u8f6c\u6362\u4e3aJava\u4ee3\u7801\u3002
\n\u4f7f\u7528GSON\u5c06JSON\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3aJava\u6a21\u578b\u7c7b\uff0c\u5373\u5c06JSON\u4eceJSON\u8f6c\u4e3aJava\u3002\u5173\u952e\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
Gson<\/span> gson<\/span> =<\/span> new<\/span> Gson<\/span>();<\/span>\r\nModel<\/span> model<\/span> =<\/span> gson<\/span>.<\/span>fromJson<\/span>(<\/span>json<\/span>,<\/span> Model<\/span>.<\/span>class<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u6574\u4e2a\u4ee3\u7801\u5982\u4e0b\u6240\u793a<\/p>\n
\u25a0 GsonJson2Java.java\u7684\u4e2d\u6587\u672c\u5730\u5316\u7248\u672c<\/p>\n
package<\/span> com.example.gson<\/span>;<\/span>\r\n\r\nimport<\/span> com.google.gson.Gson<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> GsonJson2Java<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        String<\/span> json<\/span> =<\/span> \r\n                \"{\"<\/span> +<\/span>\r\n                \"    \\\"person\\\": {\"<\/span> +<\/span>\r\n                \"        \\\"firstName\\\": \\\"John\\\",\"<\/span> +<\/span>\r\n                \"        \\\"lastName\\\": \\\"Doe\\\",\"<\/span> +<\/span>\r\n                \"        \\\"address\\\": \\\"NewYork\\\",\"<\/span> +<\/span>\r\n                \"        \\\"pets\\\": [\"<\/span> +<\/span>\r\n                \"            {\\\"type\\\": \\\"Dog\\\", \\\"name\\\": \\\"Jolly\\\"},\"<\/span> +<\/span>\r\n                \"            {\\\"type\\\": \\\"Cat\\\", \\\"name\\\": \\\"Grizabella\\\"},\"<\/span> +<\/span>\r\n                \"            {\\\"type\\\": \\\"Fish\\\", \\\"name\\\": \\\"Nimo\\\"}\"<\/span> +<\/span>\r\n                \"        ]\"<\/span> +<\/span>\r\n                \"    }\"<\/span> +<\/span>\r\n                \"}\"<\/span>;<\/span>\r\n\r\n        Gson<\/span> gson<\/span> =<\/span> new<\/span> Gson<\/span>();<\/span>\r\n        Model<\/span> model<\/span> =<\/span> gson<\/span>.<\/span>fromJson<\/span>(<\/span>json<\/span>,<\/span> Model<\/span>.<\/span>class<\/span>);<\/span>\r\n\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"firstName:\"<\/span> +<\/span> model<\/span>.<\/span>person<\/span>.<\/span>firstName<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"lastName:\"<\/span> +<\/span> model<\/span>.<\/span>person<\/span>.<\/span>lastName<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"address:\"<\/span> +<\/span> model<\/span>.<\/span>person<\/span>.<\/span>address<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"1st pet:\"<\/span> +<\/span> model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span>.<\/span>get<\/span>(<\/span>0<\/span>).<\/span>name<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
firstName:John\r\nlastName:Doe\r\naddress:NewYork\r\n1st pet:Jolly\r\n<\/code><\/pre>\n
\u4f7f\u7528GSON\uff0c\u5728Java\u548cJSON\u4e4b\u95f4\u8fdb\u884c\u8f6c\u6362\u3002
\n\u73b0\u5728\uff0c\u6211\u4eec\u8981\u7528Java\u6765\u5904\u7406JSON\u4e86\u3002\u5c06Java\u7684\u6a21\u578b\u7c7b\uff08POJO\uff09\u8f6c\u6362\u4e3aJSON\u683c\u5f0f\u3002<\/p>\n
Gson<\/span> gson<\/span> =<\/span> new<\/span> Gson<\/span>();<\/span>\r\nString<\/span> json<\/span> =<\/span> gson<\/span>.<\/span>toJson<\/span>(<\/span>model<\/span>);<\/span>\r\n<\/code><\/pre>\n
GsonJava2Json.java\u7684\u4e2d\u6587\u5b8c\u5168\u539f\u751f\u89e3\u91ca<\/p>\n
package<\/span> com.example.gson<\/span>;<\/span>\r\n\r\nimport<\/span> java.util.ArrayList<\/span>;<\/span>\r\nimport<\/span> com.google.gson.Gson<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> GsonJava2Json<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n        Model<\/span> model<\/span> =<\/span> new<\/span> Model<\/span>();<\/span>\r\n        model<\/span>.<\/span>person<\/span> =<\/span> new<\/span> Person<\/span>();<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>firstName<\/span> =<\/span> \"\u30b8\u30e7\u30f3\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>lastName<\/span> =<\/span> \"\u30c9\u30a5\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>address<\/span> =<\/span> \"\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\"<\/span>;<\/span>\r\n\r\n        model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span> =<\/span> new<\/span> ArrayList<\/span><<\/span>Pet<\/span>>();<\/span>\r\n\r\n        Pet<\/span> pet1<\/span> =<\/span> new<\/span> Pet<\/span>();<\/span>\r\n        pet1<\/span>.<\/span>type<\/span> =<\/span> \"\u72ac\"<\/span>;<\/span>\r\n        pet1<\/span>.<\/span>name<\/span> =<\/span> \"\u30b8\u30e7\u30ea\u30fc\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span>.<\/span>add<\/span>(<\/span>pet1<\/span>);<\/span>\r\n\r\n        Pet<\/span> pet2<\/span> =<\/span> new<\/span> Pet<\/span>();<\/span>\r\n        pet2<\/span>.<\/span>type<\/span> =<\/span> \"\u732b\"<\/span>;<\/span>\r\n        pet2<\/span>.<\/span>name<\/span> =<\/span> \"\u30b0\u30ea\u30b6\u30d9\u30e9\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span>.<\/span>add<\/span>(<\/span>pet2<\/span>);<\/span>\r\n\r\n        Pet<\/span> pet3<\/span> =<\/span> new<\/span> Pet<\/span>();<\/span>\r\n        pet3<\/span>.<\/span>type<\/span> =<\/span> \"\u9b5a\"<\/span>;<\/span>\r\n        pet3<\/span>.<\/span>name<\/span> =<\/span> \"\u30cb\u30e2\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span>.<\/span>add<\/span>(<\/span>pet3<\/span>);<\/span>\r\n\r\n        Gson<\/span> gson<\/span> =<\/span> new<\/span> Gson<\/span>();<\/span>\r\n        String<\/span> json<\/span> =<\/span> gson<\/span>.<\/span>toJson<\/span>(<\/span>model<\/span>);<\/span>\r\n\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>json<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u6b64\u64cd\u4f5c\u540e\uff0c\u53ef\u4ee5\u4ece\u6a21\u578b\u7c7b\u4e2d\u5bfc\u51faJSON\uff0c\u8f93\u51fa\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
{<\/span>\"person\"<\/span>:{<\/span>\"firstName\"<\/span>:\"\u30b8\u30e7\u30f3\"<\/span>,\"lastName\"<\/span>:\"\u30c9\u30a5\"<\/span>,\"address\"<\/span>:\"\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\"<\/span>,\"pets\"<\/span>:[{<\/span>\"type\"<\/span>:\"\u72ac\"<\/span>,\"name\"<\/span>:\"\u30b8\u30e7\u30ea\u30fc\"<\/span>}<\/span>,{<\/span>\"type\"<\/span>:\"\u732b\"<\/span>,\"name\"<\/span>:\"\u30b0\u30ea\u30b6\u30d9\u30e9\"<\/span>}<\/span>,{<\/span>\"type\"<\/span>:\"\u9b5a\"<\/span>,\"name\"<\/span>:\"\u30cb\u30e2\"<\/span>}]}}<\/span>\r\n\r\n<\/code><\/pre>\n
\u4f7f\u7528GSON\u5bf9JSON\u8fdb\u884c\u683c\u5f0f\u5316\uff08Pretty Printing\uff09\uff0c\u7136\u540e\u8f93\u51fa\u3002
\n\u8fd9\u6837\u505a\u7684\u8bdd\uff0cJSON\u4f1a\u4ee5\u7f29\u8fdb\u7684\u65b9\u5f0f\u6f02\u4eae\u5730\u683c\u5f0f\u5316\u51fa\u6765\u3002<\/p>\n
Gson<\/span> gson2<\/span> =<\/span> new<\/span> GsonBuilder<\/span>().<\/span>setPrettyPrinting<\/span>().<\/span>create<\/span>();<\/span>\r\nString<\/span> prettyJson<\/span> =<\/span> gson2<\/span>.<\/span>toJson<\/span>(<\/span>model<\/span>);<\/span>\r\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>prettyJson<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u6267\u884c\u7ed3\u679c<\/p>\n
{<\/span>\r\n  \"person\"<\/span>: {<\/span>\r\n    \"firstName\"<\/span>: \"\u30b8\u30e7\u30f3\"<\/span>,\r\n    \"lastName\"<\/span>: \"\u30c9\u30a5\"<\/span>,\r\n    \"address\"<\/span>: \"\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\"<\/span>,\r\n    \"pets\"<\/span>: [<\/span>\r\n      {<\/span>\r\n        \"type\"<\/span>: \"\u72ac\"<\/span>,\r\n        \"name\"<\/span>: \"\u30b8\u30e7\u30ea\u30fc\"<\/span>\r\n      }<\/span>,\r\n      {<\/span>\r\n        \"type\"<\/span>: \"\u732b\"<\/span>,\r\n        \"name\"<\/span>: \"\u30b0\u30ea\u30b6\u30d9\u30e9\"<\/span>\r\n      }<\/span>,\r\n      {<\/span>\r\n        \"type\"<\/span>: \"\u9b5a\"<\/span>,\r\n        \"name\"<\/span>: \"\u30cb\u30e2\"<\/span>\r\n      }<\/span>\r\n    ]<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\n
Jackson\u7f16\u8f91
\n– \u5220\u9664\u6587\u6863\u4e2d\u7684\u9519\u8bef\u90e8\u5206\u3002
\n– \u5728\u9875\u9762\u4e0a\u63d2\u5165\u65b0\u7684\u56fe\u50cf\u3002
\n– \u91cd\u65b0\u7ec4\u7ec7\u6bb5\u843d\u548c\u7ae0\u8282\u4ee5\u6539\u8fdb\u6d41\u7545\u5ea6\u3002
\n– \u7f16\u8f91\u5e76\u4fee\u6539\u8bed\u6cd5\u548c\u62fc\u5199\u9519\u8bef\u3002Jackson\u67091.x\u7cfb\u5217\u548c2.x\u7cfb\u5217\uff0c\u4f46\u4f7f\u75282.x\u7cfb\u5217\u3002<\/p>\n
\u4f7f\u7528Jackson\u5c06JSON\u6620\u5c04\u5230Java\u672c\u7ae0\u7684\u6e90\u4ee3\u7801\u53ef\u4ee5\u5728\u8fd9\u91cc\u627e\u5230\uff1ahttps:\/\/github.com\/riversun\/java-json-gson-jackson-http\/tree\/master\/src\/main\/java\/com\/example\/jackson<\/p>\n
Jackson\u5e93\u7684\u4f9d\u8d56\u5173\u7cfbJackson\u5e93\u7684\u6307\u5b9a\u65b9\u6cd5\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
\u25a0 \u6770\u514b\u900a\u7684\u6700\u65b0\u5e93\uff08Maven\u4ed3\u5e93\uff09
\nhttps:\/\/mvnrepository.com\/artifact\/com.fasterxml.jackson.core\/jackson-databind<\/p>\n
\u25a0 Jackson\u7684Maven\u914d\u7f6e\u793a\u4f8b<\/p>\n
<dependency><\/span>\r\n    <groupId><\/span>com.fasterxml.jackson.core<\/groupId><\/span>\r\n    <artifactId><\/span>jackson-databind<\/artifactId><\/span>\r\n    <version><\/span>2.9.8<\/version><\/span>\r\n<\/dependency><\/span>\r\n<\/code><\/pre>\n
\u25a0 Jackson\u7684gradle\u914d\u7f6e\u793a\u4f8b<\/p>\n
compile<\/span> 'com.fasterxml.jackson.core:jackson-databind:2.9.8'<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528jsonschema2pojo\u81ea\u52a8\u751f\u6210\u6a21\u578b\u7c7b\uff08POJO\uff09\u8bf7\u70b9\u51fb\u4ee5\u4e0b\u94fe\u63a5\u8fdb\u5165\u8be5\u7f51\u7ad9\uff1ahttp:\/\/www.jsonschema2pojo.org\/\uff0c\u7136\u540e\u5c06\u4e0a\u65b9\u7684JSON\u7c98\u8d34\u8fdb\u53bb\u3002<\/p>\n
\"image.png\"\u5728\u7f51\u9875\u4e0a\u8fdb\u884c\u4ee5\u4e0b\u8bbe\u7f6e\uff0c\u70b9\u51fb\u201cZip\u201d\u5373\u53ef\u81ea\u52a8\u751f\u6210\u6a21\u578b\u7c7b\u3002<\/p>\n
\u5305\u540d\uff1acom.example.jackson\uff08\u5305\u540d\uff0c\u53ef\u4ee5\u662f\u4efb\u610f\u7684\uff0c\u4f46\u662f\u751f\u6210\u7684\u6e90\u4ee3\u7801\u5e26\u6709\u8be5\u5305\u540d\uff09
\n\u7c7b\u540d\uff1aModel\uff08Pojo\u7684\u6700\u9876\u5c42\u7c7b\u540d\uff09
\n\u76ee\u6807\u8bed\u8a00\uff1aJava
\n\u6e90\u7c7b\u578b\uff1aJSON\uff08\u6839\u636eJSON\u5b57\u7b26\u4e32\u672c\u8eab\u6765\u63a8\u65ad\u6a21\u578b\u7c7b\uff09
\n\u6ce8\u89e3\u98ce\u683c\uff1aJackson 2.x\uff08\u4f7f\u7528Jackson 2.x\u89e3\u6790\u5668\uff09
\n\u2611\u5141\u8bb8\u989d\u5916\u7684\u5c5e\u6027\uff08\u5373\u4f7fJSON\u4e2d\u6709\u672a\u77e5\u5c5e\u6027\u4e5f\u53ef\u4ee5\uff09<\/p>\n
\u751f\u6210\u4e00\u4e2aZip\u6587\u4ef6\uff0c\u4e0b\u8f7d\u5e76\u6253\u5f00\u540e\uff0c\u4f1a\u81ea\u52a8\u751f\u6210\u4ee5\u4e0b3\u4e2aJava\u6587\u4ef6\u3002<\/p>\n
(2) \u67e5\u770b\u81ea\u52a8\u751f\u6210\u7684\u6a21\u578b\u7c7b\uff08POJO\uff09
\n\u25a0 Model.java\u662f\u4e00\u4e2a\u9876\u5c42\u7c7b\u3002\u5b83\u901a\u8fc7\u8bbe\u7f6e@JsonAnyGetter\u6765\u63a5\u53d7\u989d\u5916\u7684\u5c5e\u6027,\u8fd9\u662f\u5176\u7279\u70b9\u3002\u56e0\u6b64,\u76f8\u6bd4\u4e8eGSON\uff0c\u5b83\u53d8\u5f97\u66f4\u52a0\u5197\u957f\u3002<\/p>\n
package<\/span> com.example.jackson<\/span>;<\/span>\r\nimport<\/span> java.util.HashMap<\/span>;<\/span>\r\nimport<\/span> java.util.Map<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonAnyGetter<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonAnySetter<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonIgnore<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonInclude<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonProperty<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonPropertyOrder<\/span>;<\/span>\r\n@JsonInclude<\/span>(<\/span>JsonInclude<\/span>.<\/span>Include<\/span>.<\/span>NON_NULL<\/span>)<\/span>\r\n@JsonPropertyOrder<\/span>({<\/span>\r\n    \"person\"<\/span>\r\n})<\/span>\r\npublic<\/span> class<\/span> Model<\/span> {<\/span>\r\n    @JsonProperty<\/span>(<\/span>\"person\"<\/span>)<\/span>\r\n    public<\/span> Person<\/span> person<\/span>;<\/span>\r\n    @JsonIgnore<\/span>\r\n    private<\/span> Map<\/span><<\/span>String<\/span>,<\/span> Object<\/span>><\/span> additionalProperties<\/span> =<\/span> new<\/span> HashMap<\/span><<\/span>String<\/span>,<\/span> Object<\/span>>();<\/span>\r\n    @JsonAnyGetter<\/span>\r\n    public<\/span> Map<\/span><<\/span>String<\/span>,<\/span> Object<\/span>><\/span> getAdditionalProperties<\/span>()<\/span> {<\/span>\r\n        return<\/span> this<\/span>.<\/span>additionalProperties<\/span>;<\/span>\r\n    }<\/span>\r\n    @JsonAnySetter<\/span>\r\n    public<\/span> void<\/span> setAdditionalProperty<\/span>(<\/span>String<\/span> name<\/span>,<\/span> Object<\/span> value<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>additionalProperties<\/span>.<\/span>put<\/span>(<\/span>name<\/span>,<\/span> value<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u25a0 Person.java\u4e2d\u7684@JsonPropertyOrder\u53ef\u7528\u4e8e\u7ea6\u675f\u51fa\u73b0\u987a\u5e8f\u3002\u88ab\u6307\u5b9a\u4e3a”pets”:[]\u7684\u6570\u7ec4\u5c06\u88ab\u8f6c\u6362\u4e3aList\u3002<\/p>\n
package<\/span> com.example.jackson<\/span>;<\/span>\r\nimport<\/span> java.util.HashMap<\/span>;<\/span>\r\nimport<\/span> java.util.List<\/span>;<\/span>\r\nimport<\/span> java.util.Map<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonAnyGetter<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonAnySetter<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonIgnore<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonInclude<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonProperty<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonPropertyOrder<\/span>;<\/span>\r\n@JsonInclude<\/span>(<\/span>JsonInclude<\/span>.<\/span>Include<\/span>.<\/span>NON_NULL<\/span>)<\/span>\r\n@JsonPropertyOrder<\/span>({<\/span>\r\n    \"firstName\"<\/span>,<\/span>\r\n    \"lastName\"<\/span>,<\/span>\r\n    \"address\"<\/span>,<\/span>\r\n    \"pets\"<\/span>\r\n})<\/span>\r\npublic<\/span> class<\/span> Person<\/span> {<\/span>\r\n    @JsonProperty<\/span>(<\/span>\"firstName\"<\/span>)<\/span>\r\n    public<\/span> String<\/span> firstName<\/span>;<\/span>\r\n    @JsonProperty<\/span>(<\/span>\"lastName\"<\/span>)<\/span>\r\n    public<\/span> String<\/span> lastName<\/span>;<\/span>\r\n    @JsonProperty<\/span>(<\/span>\"address\"<\/span>)<\/span>\r\n    public<\/span> String<\/span> address<\/span>;<\/span>\r\n    @JsonProperty<\/span>(<\/span>\"pets\"<\/span>)<\/span>\r\n    public<\/span> List<\/span><<\/span>Pet<\/span>><\/span> pets<\/span> =<\/span> null<\/span>;<\/span>\r\n    @JsonIgnore<\/span>\r\n    private<\/span> Map<\/span><<\/span>String<\/span>,<\/span> Object<\/span>><\/span> additionalProperties<\/span> =<\/span> new<\/span> HashMap<\/span><<\/span>String<\/span>,<\/span> Object<\/span>>();<\/span>\r\n    @JsonAnyGetter<\/span>\r\n    public<\/span> Map<\/span><<\/span>String<\/span>,<\/span> Object<\/span>><\/span> getAdditionalProperties<\/span>()<\/span> {<\/span>\r\n        return<\/span> this<\/span>.<\/span>additionalProperties<\/span>;<\/span>\r\n    }<\/span>\r\n    @JsonAnySetter<\/span>\r\n    public<\/span> void<\/span> setAdditionalProperty<\/span>(<\/span>String<\/span> name<\/span>,<\/span> Object<\/span> value<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>additionalProperties<\/span>.<\/span>put<\/span>(<\/span>name<\/span>,<\/span> value<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5ba0\u7269.java<\/p>\n
package<\/span> com.example.jackson<\/span>;<\/span>\r\nimport<\/span> java.util.HashMap<\/span>;<\/span>\r\nimport<\/span> java.util.Map<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonAnyGetter<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonAnySetter<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonIgnore<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonInclude<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonProperty<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonPropertyOrder<\/span>;<\/span>\r\n@JsonInclude<\/span>(<\/span>JsonInclude<\/span>.<\/span>Include<\/span>.<\/span>NON_NULL<\/span>)<\/span>\r\n@JsonPropertyOrder<\/span>({<\/span>\r\n    \"type\"<\/span>,<\/span>\r\n    \"name\"<\/span>\r\n})<\/span>\r\npublic<\/span> class<\/span> Pet<\/span> {<\/span>\r\n    @JsonProperty<\/span>(<\/span>\"type\"<\/span>)<\/span>\r\n    public<\/span> String<\/span> type<\/span>;<\/span>\r\n    @JsonProperty<\/span>(<\/span>\"name\"<\/span>)<\/span>\r\n    public<\/span> String<\/span> name<\/span>;<\/span>\r\n    @JsonIgnore<\/span>\r\n    private<\/span> Map<\/span><<\/span>String<\/span>,<\/span> Object<\/span>><\/span> additionalProperties<\/span> =<\/span> new<\/span> HashMap<\/span><<\/span>String<\/span>,<\/span> Object<\/span>>();<\/span>\r\n    @JsonAnyGetter<\/span>\r\n    public<\/span> Map<\/span><<\/span>String<\/span>,<\/span> Object<\/span>><\/span> getAdditionalProperties<\/span>()<\/span> {<\/span>\r\n        return<\/span> this<\/span>.<\/span>additionalProperties<\/span>;<\/span>\r\n    }<\/span>\r\n    @JsonAnySetter<\/span>\r\n    public<\/span> void<\/span> setAdditionalProperty<\/span>(<\/span>String<\/span> name<\/span>,<\/span> Object<\/span> value<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>additionalProperties<\/span>.<\/span>put<\/span>(<\/span>name<\/span>,<\/span> value<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528Jackson\u5c06JSON\u8f6c\u6362\u4e3aJava\u3002
\n\u4f7f\u7528Jackson\u5c06JSON\u5b57\u7b26\u4e32\u52a0\u8f7d\u5230Java\u6a21\u578b\u7c7b\u4e2d\uff0c\u5b9e\u73b0\u4eceJSON\u5230Java\u7684\u8f6c\u6362\u7684\u5173\u952e\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
ObjectMapper<\/span> mapper<\/span> =<\/span> new<\/span> ObjectMapper<\/span>();<\/span>\r\nModel<\/span> model<\/span> =<\/span> mapper<\/span>.<\/span>readValue<\/span>(<\/span>json<\/span>,<\/span> Model<\/span>.<\/span>class<\/span>);<\/span>\r\n<\/code><\/pre>\n
The entire code would be as follows:
\n\u6574\u4e2a\u4ee3\u7801\u5982\u4e0b:<\/p>\n
\u25a0 JacksonJson2Java.java<\/p>\n
\u6770\u514b\u900aJson2Java.java<\/p>\n
package<\/span> com.example.jackson<\/span>;<\/span>\r\n\r\nimport<\/span> java.io.IOException<\/span>;<\/span>\r\n\r\nimport<\/span> com.fasterxml.jackson.core.JsonParseException<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.databind.JsonMappingException<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.databind.ObjectMapper<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> JacksonJson2Java<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> throws<\/span> JsonParseException<\/span>,<\/span> JsonMappingException<\/span>,<\/span> IOException<\/span> {<\/span>\r\n        String<\/span> json<\/span> =<\/span> \"{\"<\/span> +<\/span>\r\n                \"    \\\"person\\\": {\"<\/span> +<\/span>\r\n                \"        \\\"firstName\\\": \\\"John\\\",\"<\/span> +<\/span>\r\n                \"        \\\"lastName\\\": \\\"Doe\\\",\"<\/span> +<\/span>\r\n                \"        \\\"address\\\": \\\"NewYork\\\",\"<\/span> +<\/span>\r\n                \"        \\\"pets\\\": [\"<\/span> +<\/span>\r\n                \"            {\\\"type\\\": \\\"Dog\\\", \\\"name\\\": \\\"Jolly\\\"},\"<\/span> +<\/span>\r\n                \"            {\\\"type\\\": \\\"Cat\\\", \\\"name\\\": \\\"Grizabella\\\"},\"<\/span> +<\/span>\r\n                \"            {\\\"type\\\": \\\"Fish\\\", \\\"name\\\": \\\"Nimo\\\"}\"<\/span> +<\/span>\r\n                \"        ]\"<\/span> +<\/span>\r\n                \"    }\"<\/span> +<\/span>\r\n                \"}\"<\/span>;<\/span>\r\n\r\n        ObjectMapper<\/span> mapper<\/span> =<\/span> new<\/span> ObjectMapper<\/span>();<\/span>\r\n        Model<\/span> model<\/span> =<\/span> mapper<\/span>.<\/span>readValue<\/span>(<\/span>json<\/span>,<\/span> Model<\/span>.<\/span>class<\/span>);<\/span>\r\n\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"firstName:\"<\/span> +<\/span> model<\/span>.<\/span>person<\/span>.<\/span>firstName<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"lastName:\"<\/span> +<\/span> model<\/span>.<\/span>person<\/span>.<\/span>lastName<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"address:\"<\/span> +<\/span> model<\/span>.<\/span>person<\/span>.<\/span>address<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"1st pet:\"<\/span> +<\/span> model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span>.<\/span>get<\/span>(<\/span>0<\/span>).<\/span>name<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528 Jackson\uff0c\u5c06 Java \u8f6c\u6362\u4e3a JSON\u3002
\n\u73b0\u5728\u8ba9\u6211\u4eec\u6765\u4ecb\u7ecd\u4e00\u4e0b\u5982\u4f55\u901a\u8fc7Java\u6765\u5904\u7406JSON\u3002\u6211\u4eec\u9700\u8981\u5c06Java\u7684\u6a21\u578b\u7c7b(POJO)\u8f6c\u5316\u4e3aJSON\u683c\u5f0f\u3002<\/p>\n
ObjectMapper<\/span> mapper<\/span> =<\/span> new<\/span> ObjectMapper<\/span>();<\/span>\r\nString<\/span> json<\/span> =<\/span> mapper<\/span>.<\/span>writeValueAsString<\/span>(<\/span>model<\/span>);<\/span>\r\n<\/code><\/pre>\n
JacksonJava2Json.java \u7684\u4e2d\u6587\u91ca\u4e49\u662f\u4ec0\u4e48\uff1f<\/p>\n
package<\/span> com.example.jackson<\/span>;<\/span>\r\nimport<\/span> java.util.ArrayList<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.core.JsonProcessingException<\/span>;<\/span>\r\nimport<\/span> com.fasterxml.jackson.databind.ObjectMapper<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> JacksonJava2Json<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> throws<\/span> JsonProcessingException<\/span> {<\/span>\r\n\r\n        Model<\/span> model<\/span> =<\/span> new<\/span> Model<\/span>();<\/span>\r\n        model<\/span>.<\/span>person<\/span> =<\/span> new<\/span> Person<\/span>();<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>firstName<\/span> =<\/span> \"\u30b8\u30e7\u30f3\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>lastName<\/span> =<\/span> \"\u30c9\u30a5\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>address<\/span> =<\/span> \"\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span> =<\/span> new<\/span> ArrayList<\/span><<\/span>Pet<\/span>>();<\/span>\r\n        Pet<\/span> pet1<\/span> =<\/span> new<\/span> Pet<\/span>();<\/span>\r\n        pet1<\/span>.<\/span>type<\/span> =<\/span> \"\u72ac\"<\/span>;<\/span>\r\n        pet1<\/span>.<\/span>name<\/span> =<\/span> \"\u30b8\u30e7\u30ea\u30fc\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span>.<\/span>add<\/span>(<\/span>pet1<\/span>);<\/span>\r\n        Pet<\/span> pet2<\/span> =<\/span> new<\/span> Pet<\/span>();<\/span>\r\n        pet2<\/span>.<\/span>type<\/span> =<\/span> \"\u732b\"<\/span>;<\/span>\r\n        pet2<\/span>.<\/span>name<\/span> =<\/span> \"\u30b0\u30ea\u30b6\u30d9\u30e9\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span>.<\/span>add<\/span>(<\/span>pet2<\/span>);<\/span>\r\n        Pet<\/span> pet3<\/span> =<\/span> new<\/span> Pet<\/span>();<\/span>\r\n        pet3<\/span>.<\/span>type<\/span> =<\/span> \"\u9b5a\"<\/span>;<\/span>\r\n        pet3<\/span>.<\/span>name<\/span> =<\/span> \"\u30cb\u30e2\"<\/span>;<\/span>\r\n        model<\/span>.<\/span>person<\/span>.<\/span>pets<\/span>.<\/span>add<\/span>(<\/span>pet3<\/span>);<\/span>\r\n\r\n        ObjectMapper<\/span> mapper<\/span> =<\/span> new<\/span> ObjectMapper<\/span>();<\/span>\r\n        String<\/span> json<\/span> =<\/span> mapper<\/span>.<\/span>writeValueAsString<\/span>(<\/span>model<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>json<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5f53\u6267\u884c\u6b64\u547d\u4ee4\u65f6\uff0c\u80fd\u591f\u4ece\u6a21\u578b\u7c7b\u4e2d\u4ee5\u4ee5\u4e0b\u683c\u5f0f\u8f93\u51faJSON\u3002<\/p>\n
{<\/span>\"person\"<\/span>:{<\/span>\"firstName\"<\/span>:\"\u30b8\u30e7\u30f3\"<\/span>,\"lastName\"<\/span>:\"\u30c9\u30a5\"<\/span>,\"address\"<\/span>:\"\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\"<\/span>,\"pets\"<\/span>:[{<\/span>\"type\"<\/span>:\"\u72ac\"<\/span>,\"name\"<\/span>:\"\u30b8\u30e7\u30ea\u30fc\"<\/span>}<\/span>,{<\/span>\"type\"<\/span>:\"\u732b\"<\/span>,\"name\"<\/span>:\"\u30b0\u30ea\u30b6\u30d9\u30e9\"<\/span>}<\/span>,{<\/span>\"type\"<\/span>:\"\u9b5a\"<\/span>,\"name\"<\/span>:\"\u30cb\u30e2\"<\/span>}]}}<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528Jackson\u5e93\u5c06JSON\u683c\u5f0f\u5316\uff08Pretty Printing\uff09\u5e76\u8f93\u51fa\u3002
\n\u6309\u7167\u8fd9\u6837\u7684\u65b9\u5f0f\uff0cJSON\u4f1a\u88ab\u7f29\u8fdb\u5e76\u4ee5\u6f02\u4eae\u7684\u683c\u5f0f\u5448\u73b0\u51fa\u6765\u3002<\/p>\n
ObjectMapper<\/span> mapper2<\/span> =<\/span> new<\/span> ObjectMapper<\/span>();<\/span>\r\nString<\/span> prettyJson<\/span> =<\/span> mapper2<\/span>.<\/span>writerWithDefaultPrettyPrinter<\/span>().<\/span>writeValueAsString<\/span>(<\/span>model<\/span>);<\/span>\r\nSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>prettyJson<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u8fd0\u884c\u7ed3\u679c<\/p>\n
{<\/span>\r\n  \"person\"<\/span> : {<\/span>\r\n    \"firstName\"<\/span> : \"\u30b8\u30e7\u30f3\"<\/span>,\r\n    \"lastName\"<\/span> : \"\u30c9\u30a5\"<\/span>,\r\n    \"address\"<\/span> : \"\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\"<\/span>,\r\n    \"pets\"<\/span> : [<\/span> {<\/span>\r\n      \"type\"<\/span> : \"\u72ac\"<\/span>,\r\n      \"name\"<\/span> : \"\u30b8\u30e7\u30ea\u30fc\"<\/span>\r\n    }<\/span>, {<\/span>\r\n      \"type\"<\/span> : \"\u732b\"<\/span>,\r\n      \"name\"<\/span> : \"\u30b0\u30ea\u30b6\u30d9\u30e9\"<\/span>\r\n    }<\/span>, {<\/span>\r\n      \"type\"<\/span> : \"\u9b5a\"<\/span>,\r\n      \"name\"<\/span> : \"\u30cb\u30e2\"<\/span>\r\n    }<\/span> ]<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u603b\u7ed3GSON\u3092\u3064\u304b\u3063\u3066JSON\u2192Java\u3001Java\u2192JSON\u3092\u304a\u624b\u8efd\u306b\u5b9f\u884c\u3059\u308b\u65b9\u6cd5\u3092\u8aac\u660e\u3057\u307e\u3057\u305f<\/p>\n
GSON\u3092\u4f7f\u3063\u305f\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306f\u3053\u3061\u3089\u3067\u3059<\/p>\n
Jackson\u306e\u5834\u5408\u3082\u540c\u69d8\u306b\u8aac\u660e\u3057\u307e\u3057\u305f<\/p>\n
Jackson\u3092\u4f7f\u3063\u305f\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306f\u3053\u3061\u3089\u3067\u3059<\/p>\n
JSON\u3092HTTP\u901a\u4fe1\u3067POST\u3084GET\u3059\u308b\u65b9\u6cd5\u306f\u3053\u3061\u3089\u306b\u307e\u3068\u3081\u307e\u3057\u305f<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7b80\u800c\u8a00\u4e4b\uff0c\u53ea\u9700\u8981\u4e00\u79cd\u9009\u62e9\u3002\u5728\u4f7f\u7528Java\u8fdb\u884cWeb API\u65f6\uff0c\u5e38\u5e38\u4f7f\u7528\u7684JSON\u2192Java\u3001Java\u2192JSON […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30997","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u3010Java\u3011\u5c06JSON\u8f6c\u6362\u4e3aJava\uff0c\u5c06Java\u8f6c\u6362\u4e3aJSON \u301c\u4f7f\u7528GSON\u548cJackson\u7684\u65b9\u6cd5\u301c - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010Java\u3011\u5c06JSON\u8f6c\u6362\u4e3aJava\uff0c\u5c06Java\u8f6c\u6362\u4e3aJSON \u301c\u4f7f\u7528GSON\u548cJackson\u7684\u65b9\u6cd5\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u3011\u5c06json\u8f6c\u6362\u4e3ajava\uff0c\u5c06java\u8f6c\u6362\u4e3ajson-\u301c\u4f7f\u7528gson\u548cjackson\u7684\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Java\u3011\u5c06JSON\u8f6c\u6362\u4e3aJava\uff0c\u5c06Java\u8f6c\u6362\u4e3aJSON \u301c\u4f7f\u7528GSON\u548cJackson\u7684\u65b9\u6cd5\u301c\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010Java\u3011\u5c06JSON\u8f6c\u6362\u4e3aJava\uff0c\u5c06Java\u8f6c\u6362\u4e3aJSON \u301c\u4f7f\u7528GSON\u548cJackson\u7684\u65b9\u6cd5\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010java\u3011\u5c06json\u8f6c\u6362\u4e3ajava\uff0c\u5c06java\u8f6c\u6362\u4e3ajson-\u301c\u4f7f\u7528gson\u548cjackson\u7684\u65b9\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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