{"id":31615,"date":"2023-03-19T03:56:41","date_gmt":"2022-11-21T12:55:43","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java-%e6%95%b0%e7%bb%84%e7%9a%84%e6%b7%b1%e6%8b%b7%e8%b4%9d\/"},"modified":"2024-04-29T19:31:51","modified_gmt":"2024-04-29T11:31:51","slug":"java-%e6%95%b0%e7%bb%84%e7%9a%84%e6%b7%b1%e6%8b%b7%e8%b4%9d","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java-%e6%95%b0%e7%bb%84%e7%9a%84%e6%b7%b1%e6%8b%b7%e8%b4%9d\/","title":{"rendered":"[Java] \u6570\u7ec4\u7684\u6df1\u62f7\u8d1d"},"content":{"rendered":"

\u770b\u5230\u4e00\u4e2a\u8ba4\u4e3a\u7528clone\u65b9\u6cd5\u5bf9\u591a\u7ef4\u6570\u7ec4\uff08\u6570\u7ec4\u7684\u6570\u7ec4\uff09\u8fdb\u884c\u6df1\u62f7\u8d1d\u7684\u4ee3\u7801\uff0c\u7136\u540e\u5fd8\u8bb0\u4e86\u6570\u7ec4\u7684clone\u65b9\u6cd5\u5e76\u4e0d\u4f1a\u8fdb\u884c\u5143\u7d20\u7684\u6df1\u62f7\u8d1d\uff0c\u7a81\u7136\u95f4\u5c31\u5f00\u59cb\u60f3\uff0c\u80fd\u5426\u5b9e\u73b0\u4e00\u4e2a\u901a\u7528\u7684\u591a\u7ef4\u6570\u7ec4\u7684\u6df1\u62f7\u8d1d\uff08\u4ec5\u4f7f\u7528JDK 7\u9644\u5e26\u7684\u7c7b\u5e93\uff09\u5462\uff1f\u4e8e\u662f\u5c31\u5f00\u59cb\u6478\u7d22\u4e86\u4e00\u4e0b\uff0c\u4f3c\u4e4e\u53ef\u4ee5\u4f7f\u7528\u53cd\u5c04\u5b9e\u73b0\uff0c\u4f46\u5b9e\u7528\u6027\u53ef\u80fd\u4e0d\u5f3a…\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5904\u7406\u975eCloneable\u5bf9\u8c61\u7684\u65b9\u5f0f\u6709\u4e9b\u9a6c\u864e\uff08\u542b\u7cca\uff09\u3002<\/p>\n

(2019\/5\/8 \u8ffd\u8a18)
\n\u6211\u53d1\u73b0\u8fd9\u7bc7\u65e7\u7684\u5783\u573e\u6587\u7ae0\u7adf\u7136\u88ab\u63d0\u540d\u5728\u8fd9\u91cc\uff0c\u6240\u4ee5\u4ece\u5b9e\u73b0\u793a\u4f8b\u7684\u8bc4\u8bba\u4e2d\u5220\u9664\u4e86\u201c\u5f15\u7528\u4f20\u9012\u201d\u7684\u8868\u8fbe\uff08\u6c57\uff09<\/p>\n

\u901a\u8fc7\u53cd\u601d\u6765\u6267\u884c<\/h1>\n
import<\/span> java.lang.reflect.Array<\/span>;<\/span>\r\nimport<\/span> java.lang.reflect.Method<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ArrayUtils<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> Object<\/span> deepClone<\/span>(<\/span>Object<\/span> original<\/span>)<\/span> {<\/span>\r\n        \/\/ \u5f15\u6570\u304cnull\u3082\u3057\u304f\u306f\u975e\u914d\u5217\u306e\u5834\u5408\u306fnull\u3092\u8fd4\u3059<\/span>\r\n        if<\/span> (<\/span>original<\/span> ==<\/span> null<\/span> ||<\/span> !<\/span>original<\/span>.<\/span>getClass<\/span>().<\/span>isArray<\/span>())<\/span> {<\/span>\r\n            return<\/span> null<\/span>;<\/span>\r\n        }<\/span>\r\n        \/\/ \u540c\u671f\u5316<\/span>\r\n        synchronized<\/span> (<\/span>original<\/span>)<\/span> {<\/span>\r\n            \/\/ \u914d\u5217\u306e\u8981\u7d20\u306e\u578b<\/span>\r\n            Class<\/span><?><\/span> componentType<\/span> =<\/span> original<\/span>.<\/span>getClass<\/span>().<\/span>getComponentType<\/span>();<\/span>\r\n            \/\/ \u914d\u5217\u306e\u8981\u7d20\u306e\u6570<\/span>\r\n            int<\/span> length<\/span> =<\/span> Array<\/span>.<\/span>getLength<\/span>(<\/span>original<\/span>);<\/span>\r\n            \/\/ \u914d\u5217\u306e\u8907\u88fd\uff08\u30ac\u30e9\uff09\u3092\u751f\u6210<\/span>\r\n            Object<\/span> duplicate<\/span> =<\/span> Array<\/span>.<\/span>newInstance<\/span>(<\/span>componentType<\/span>,<\/span> length<\/span>);<\/span>\r\n            try<\/span> {<\/span>\r\n                \/\/ \u914d\u5217\u306e\u8981\u7d20\u306e\u6570\u3060\u3051\u30eb\u30fc\u30d7\u51e6\u7406<\/span>\r\n                for<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> length<\/span>;<\/span> i<\/span>++)<\/span> {<\/span>\r\n                    Object<\/span> item<\/span> =<\/span> Array<\/span>.<\/span>get<\/span>(<\/span>original<\/span>,<\/span> i<\/span>);<\/span>\r\n                    if<\/span> (<\/span>item<\/span> ==<\/span> null<\/span>)<\/span> {<\/span>\r\n                        \/\/ \u8981\u7d20\u304cnull\u306e\u5834\u5408<\/span>\r\n                        Array<\/span>.<\/span>set<\/span>(<\/span>duplicate<\/span>,<\/span> i<\/span>,<\/span> null<\/span>);<\/span>\r\n                    }<\/span>\r\n                    else<\/span> {<\/span>\r\n                        if<\/span> (<\/span>item<\/span>.<\/span>getClass<\/span>().<\/span>isArray<\/span>())<\/span> {<\/span>\r\n                            \/\/ \u8981\u7d20\u304c\u914d\u5217\u306e\u5834\u5408\u306f\u518d\u5e30\u51e6\u7406\u958b\u59cb<\/span>\r\n                            Object<\/span> clone<\/span> =<\/span> deepClone<\/span>(<\/span>item<\/span>);<\/span>\r\n                            Array<\/span>.<\/span>set<\/span>(<\/span>duplicate<\/span>,<\/span> i<\/span>,<\/span> componentType<\/span>.<\/span>cast<\/span>(<\/span>clone<\/span>));<\/span>\r\n                        }<\/span>\r\n                        else<\/span> {<\/span>\r\n                            \/\/\u8981\u7d20\u304c\u914d\u5217\u3067\u306f\u306a\u3044\u5834\u5408<\/span>\r\n                            Class<\/span><?><\/span> type<\/span> =<\/span> item<\/span>.<\/span>getClass<\/span>();<\/span>\r\n                            if<\/span> (<\/span>type<\/span>.<\/span>cast<\/span>(<\/span>item<\/span>)<\/span> instanceof<\/span> Cloneable<\/span>)<\/span> {<\/span>\r\n                                \/\/ Cloneable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u3044\u308c\u3070clone\u30e1\u30bd\u30c3\u30c9\u306e\u623b\u308a\u5024\u3092\u683c\u7d0d<\/span>\r\n                                Method<\/span> clone<\/span> =<\/span> type<\/span>.<\/span>getMethod<\/span>(<\/span>\"clone\"<\/span>);<\/span>\r\n                                Array<\/span>.<\/span>set<\/span>(<\/span>duplicate<\/span>,<\/span> i<\/span>,<\/span> type<\/span>.<\/span>cast<\/span>(<\/span>clone<\/span>.<\/span>invoke<\/span>(<\/span>item<\/span>)));<\/span>\r\n                            }<\/span>\r\n                            else<\/span> {<\/span>\r\n                                \/\/ Cloneable\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30a4\u30b9\u3092\u5b9f\u88c5\u3057\u3066\u3044\u306a\u3051\u308c\u3070\u305d\u306e\u307e\u307e\u683c\u7d0d\uff08\u30c7\u30a3\u30fc\u30d7\u30b3\u30d4\u30fc\u3067\u304d\u3066\u306a\u3044\u304b\u3082\uff09<\/span>\r\n                                Array<\/span>.<\/span>set<\/span>(<\/span>duplicate<\/span>,<\/span> i<\/span>,<\/span> type<\/span>.<\/span>cast<\/span>(<\/span>item<\/span>));<\/span>\r\n                            }<\/span>\r\n                        }<\/span>\r\n                    }<\/span>\r\n                }<\/span>\r\n            }<\/span> catch<\/span> (<\/span>Exception<\/span> e<\/span>)<\/span> {<\/span>\r\n                e<\/span>.<\/span>printStackTrace<\/span>();<\/span>\r\n                return<\/span> null<\/span>;<\/span>\r\n            }<\/span>\r\n            return<\/span> duplicate<\/span>;<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u6211\u4eec\u4ec5\u9650\u5236\u5728\u53ef\u5e8f\u5217\u5316\u7684\u5bf9\u8c61\u6570\u7ec4\u4e0a\uff0c\u4f3c\u4e4e\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u5b9e\u73b0\u3002\u4e0d\u8fc7\uff0c\u6027\u80fd\u53ef\u80fd\u4f1a\u53d7\u5230\u5f71\u54cd\u3002<\/p>\n
\u4f7f\u7528\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u8fdb\u884c\u5b9e\u73b0<\/h1>\n
import<\/span> java.io.ByteArrayInputStream<\/span>;<\/span>\r\nimport<\/span> java.io.ByteArrayOutputStream<\/span>;<\/span>\r\nimport<\/span> java.io.IOException<\/span>;<\/span>\r\nimport<\/span> java.io.ObjectInputStream<\/span>;<\/span>\r\nimport<\/span> java.io.ObjectOutputStream<\/span>;<\/span>\r\nimport<\/span> java.io.Serializable<\/span>;<\/span>\r\nimport<\/span> java.lang.reflect.Array<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ArrayUtils<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> Object<\/span> deepClone<\/span>(<\/span>Object<\/span> original<\/span>)<\/span> {<\/span>\r\n        \/\/ \u5f15\u6570\u304cnull\u3082\u3057\u304f\u306f\u975e\u914d\u5217\u3001\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u4e0d\u53ef\u306e\u5834\u5408\u306fnull\u3092\u8fd4\u3059<\/span>\r\n        if<\/span> (<\/span>original<\/span> ==<\/span> null<\/span> ||<\/span> !<\/span>original<\/span>.<\/span>getClass<\/span>().<\/span>isArray<\/span>()<\/span> ||<\/span> !<\/span>isSerializable<\/span>(<\/span>original<\/span>))<\/span> {<\/span>\r\n            return<\/span> null<\/span>;<\/span>\r\n        }<\/span>\r\n        \/\/ \u540c\u671f\u5316<\/span>\r\n        synchronized<\/span>(<\/span>original<\/span>)<\/span> {<\/span>\r\n            ByteArrayOutputStream<\/span> baos<\/span> =<\/span> null<\/span>;<\/span>\r\n            ObjectOutputStream<\/span> oos<\/span> =<\/span> null<\/span>;<\/span>\r\n            ByteArrayInputStream<\/span> bais<\/span> =<\/span> null<\/span>;<\/span>\r\n            ObjectInputStream<\/span> ois<\/span> =<\/span> null<\/span>;<\/span>\r\n            try<\/span> {<\/span>\r\n                \/\/ \u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u30fb\u30c7\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba<\/span>\r\n                baos<\/span> =<\/span> new<\/span> ByteArrayOutputStream<\/span>();<\/span>\r\n                oos<\/span> =<\/span> new<\/span> ObjectOutputStream<\/span>(<\/span>baos<\/span>);<\/span>\r\n                oos<\/span>.<\/span>writeObject<\/span>(<\/span>original<\/span>);<\/span>\r\n                oos<\/span>.<\/span>flush<\/span>();<\/span>\r\n                bais<\/span> =<\/span> new<\/span> ByteArrayInputStream<\/span>(<\/span>baos<\/span>.<\/span>toByteArray<\/span>());<\/span>\r\n                ois<\/span> =<\/span> new<\/span> ObjectInputStream<\/span>(<\/span>bais<\/span>);<\/span>\r\n                return<\/span> ois<\/span>.<\/span>readObject<\/span>();<\/span>\r\n            }<\/span> catch<\/span> (<\/span>Exception<\/span> e<\/span>)<\/span> {<\/span>\r\n                e<\/span>.<\/span>printStackTrace<\/span>();<\/span>\r\n                return<\/span> null<\/span>;<\/span>\r\n            }<\/span> finally<\/span> {<\/span>\r\n                \/\/ \u30af\u30ed\u30fc\u30ba\u51e6\u7406<\/span>\r\n                if<\/span> (<\/span>ois<\/span> !=<\/span> null<\/span>)<\/span> try<\/span> {<\/span> ois<\/span>.<\/span>close<\/span>();<\/span> }<\/span> catch<\/span> (<\/span>IOException<\/span> ioe<\/span>)<\/span> {};<\/span>\r\n                if<\/span> (<\/span>bais<\/span> !=<\/span> null<\/span>)<\/span> try<\/span> {<\/span> bais<\/span>.<\/span>close<\/span>();<\/span> }<\/span> catch<\/span> (<\/span>IOException<\/span> ioe<\/span>)<\/span> {};<\/span>\r\n                if<\/span> (<\/span>oos<\/span> !=<\/span> null<\/span>)<\/span> try<\/span> {<\/span> oos<\/span>.<\/span>close<\/span>();<\/span> }<\/span> catch<\/span> (<\/span>IOException<\/span> ioe<\/span>)<\/span> {};<\/span>\r\n                if<\/span> (<\/span>baos<\/span> !=<\/span> null<\/span>)<\/span> try<\/span> {<\/span> baos<\/span>.<\/span>close<\/span>();<\/span> }<\/span> catch<\/span> (<\/span>IOException<\/span> ioe<\/span>)<\/span> {};<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> boolean<\/span> isSerializable<\/span>(<\/span>Object<\/span> target<\/span>)<\/span> {<\/span>\r\n        \/\/ \u5f15\u6570\u304cnull\u3082\u3057\u304f\u306f\u975e\u914d\u5217\u306e\u5834\u5408\u306ffalse\u3092\u8fd4\u3059<\/span>\r\n        if<\/span> (<\/span>target<\/span> ==<\/span> null<\/span> ||<\/span> !<\/span>target<\/span>.<\/span>getClass<\/span>().<\/span>isArray<\/span>())<\/span> {<\/span>\r\n            return<\/span> false<\/span>;<\/span>\r\n        }<\/span>\r\n        \/\/ \u914d\u5217\u306e\u8981\u7d20\u306e\u578b<\/span>\r\n        Class<\/span><?><\/span> componentType<\/span> =<\/span> target<\/span>.<\/span>getClass<\/span>().<\/span>getComponentType<\/span>();<\/span>\r\n        \/\/ \u914d\u5217\u306e\u5148\u982d\u306e\u8981\u7d20<\/span>\r\n        Object<\/span> item<\/span> =<\/span> Array<\/span>.<\/span>get<\/span>(<\/span>target<\/span>,<\/span> 0<\/span>);<\/span>\r\n        if<\/span> (<\/span>componentType<\/span>.<\/span>isArray<\/span>())<\/span> {<\/span>\r\n            \/\/ \u8981\u7d20\u304c\u914d\u5217\u306e\u5834\u5408\u306f\u518d\u5e30\u51e6\u7406\u306e\u7d50\u679c\u3092\u8fd4\u3059<\/span>\r\n            return<\/span> isSerializable<\/span>(<\/span>item<\/span>);<\/span>\r\n        }<\/span>\r\n        else<\/span> {<\/span>\r\n            if<\/span> (<\/span>componentType<\/span>.<\/span>isPrimitive<\/span>()<\/span> ||<\/span> componentType<\/span>.<\/span>cast<\/span>(<\/span>item<\/span>)<\/span> instanceof<\/span> Serializable<\/span>)<\/span> {<\/span>\r\n                \/\/ \u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u53ef<\/span>\r\n                return<\/span> true<\/span>;<\/span>\r\n            }<\/span>\r\n            else<\/span> {<\/span>\r\n                \/\/ \u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u4e0d\u53ef<\/span>\r\n                return<\/span> false<\/span>;<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u770b\u5230\u4e00\u4e2a\u8ba4\u4e3a\u7528clone\u65b9\u6cd5\u5bf9\u591a\u7ef4\u6570\u7ec4\uff08\u6570\u7ec4\u7684\u6570\u7ec4\uff09\u8fdb\u884c\u6df1\u62f7\u8d1d\u7684\u4ee3\u7801\uff0c\u7136\u540e\u5fd8\u8bb0\u4e86\u6570\u7ec4\u7684clone\u65b9\u6cd5\u5e76\u4e0d\u4f1a\u8fdb\u884c […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31615","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n[Java] \u6570\u7ec4\u7684\u6df1\u62f7\u8d1d - Blog - Silicon Cloud<\/title>\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\/java-\u6570\u7ec4\u7684\u6df1\u62f7\u8d1d\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Java] \u6570\u7ec4\u7684\u6df1\u62f7\u8d1d\" \/>\n<meta property=\"og:description\" content=\"\u770b\u5230\u4e00\u4e2a\u8ba4\u4e3a\u7528clone\u65b9\u6cd5\u5bf9\u591a\u7ef4\u6570\u7ec4\uff08\u6570\u7ec4\u7684\u6570\u7ec4\uff09\u8fdb\u884c\u6df1\u62f7\u8d1d\u7684\u4ee3\u7801\uff0c\u7136\u540e\u5fd8\u8bb0\u4e86\u6570\u7ec4\u7684clone\u65b9\u6cd5\u5e76\u4e0d\u4f1a\u8fdb\u884c […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/java-\u6570\u7ec4\u7684\u6df1\u62f7\u8d1d\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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