{"id":39869,"date":"2023-05-26T17:45:48","date_gmt":"2023-11-20T09:39:46","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8-kotlin-%e5%bc%80%e5%8f%91%e7%9a%84-spring-boot2%e3%80%82\/"},"modified":"2024-04-30T06:04:38","modified_gmt":"2024-04-29T22:04:38","slug":"%e4%bd%bf%e7%94%a8-kotlin-%e5%bc%80%e5%8f%91%e7%9a%84-spring-boot2%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8-kotlin-%e5%bc%80%e5%8f%91%e7%9a%84-spring-boot2%e3%80%82\/","title":{"rendered":"\u4f7f\u7528 Kotlin \u5f00\u53d1\u7684 Spring Boot2"},"content":{"rendered":"

\u670d\u52a1\u5668\u7aef\u7684Kotlin\u5f88\u53d7\u6b22\u8fce\u5462\uff01\uff08\uff1f\uff09
\n\u7531\u4e8eKotlin\u7684\u6846\u67b6\u5904\u4e8e\u65e9\u671f\u9636\u6bb5\uff0c\u6211\u8ba4\u4e3a\u9009\u62e9Java\u7684\u6846\u67b6\u53ef\u80fd\u66f4\u597d\u3002
\n\u63d0\u5230Java\u7684\u6846\u67b6\uff0c\u5c31\u4e0d\u5f97\u4e0d\u8bf4Spring Framework\u5462\u3002
\n\u6211\u5c1d\u8bd5\u4e86\u7528Kotlin\u505aSpring Boot 2\u3002<\/p>\n

\u6211\u5c06\u521b\u5efa\u4e00\u4e2a\u4ece\u6570\u636e\u5e93\u4e2d\u83b7\u53d6\u6570\u636e\u5e76\u8fd4\u56de\u7684RestAPI\uff0c\u7528\u4e8e\u793a\u4f8b\u3002<\/p>\n

\u521b\u5efa\u9879\u76ee<\/h2>\n
\"Spring<\/div>\n

\u4f7f\u7528IntelliJ IDEA\u7b49\u5de5\u5177\u6253\u5f00\u5df2\u4e0b\u8f7d\u7684\u9879\u76ee\u3002<\/p>\n

\u5982\u679c\u60a8\u5e0c\u671b\u5728AP\u670d\u52a1\u5668\u4e0a\u4f7f\u7528Jetty\u800c\u4e0d\u662fTomcat\uff0c\u5219\u53ef\u4ee5\u5728dependencies\u4e2d\u6dfb\u52a0Jetty\u5e76\u6392\u9664spring-boot-starter-web\u4e2d\u5305\u542b\u7684Tomcat\u3002<\/p>\n

implementation<\/span>(<\/span>'org.springframework.boot:spring-boot-starter-jetty'<\/span>)<\/span>\r\n<\/code><\/pre>\n
configurations<\/span> {<\/span>\r\n    implementation<\/span>.<\/span>exclude<\/span> group:<\/span> 'org.springframework.boot'<\/span>,<\/span> module:<\/span> 'spring-boot-starter-tomcat'<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u56e0\u4e3a\u6211\u4eec\u5df2\u7ecf\u5b89\u88c5\u4e86jdbc\uff0c\u6240\u4ee5\u5728\u542f\u52a8\u65f6\u9700\u8981\u9a71\u52a8\u7a0b\u5e8f\u3002\u8bf7\u5c06\u5176\u6dfb\u52a0\u5230\u4f9d\u8d56\u9879\u4e2d\u3002<\/p>\n
runtime<\/span>(<\/span>'com.h2database:h2'<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u60a8\u5e0c\u671b\u4f7f\u7528application.yml\u800c\u4e0d\u662fapplication.properties\uff0c\u4e5f\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a\u8bf7\u5220\u9664application.properties\u5e76\u521b\u5efa\u4e00\u4e2a\u540d\u4e3aapplication.yml\u7684\u6587\u4ef6\u3002<\/p>\n
## \u4f8b\u3067\u3059<\/span>\r\nlogging<\/span>:<\/span>\r\n  level<\/span>:<\/span>\r\n    root<\/span>:<\/span> warn<\/span>\r\n    org<\/span>:<\/span>\r\n      springframework<\/span>:<\/span>\r\n        web<\/span>:<\/span> info<\/span>\r\nspring<\/span>:<\/span>\r\n  main<\/span>:<\/span>\r\n    banner-mode<\/span>:<\/span> \"<\/span>off\"<\/span>\r\n<\/code><\/pre>\n
\u521b\u5efa\u63a7\u5236\u5668<\/h2>\n
\u9996\u5148\uff0c\u6211\u4eec\u5c06\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684API\u3002
\n\u60a8\u53ef\u4ee5\u81ea\u7531\u4f7f\u7528\u8be5API\uff0c\u4e0d\u9700\u8981\u62c5\u5fc3\u6ce8\u91ca\u3002<\/p>\n
import<\/span> com.fasterxml.jackson.annotation.JsonProperty<\/span>\r\nimport<\/span> org.springframework.http.MediaType<\/span>\r\nimport<\/span> org.springframework.web.bind.annotation.GetMapping<\/span>\r\nimport<\/span> org.springframework.web.bind.annotation.RequestMapping<\/span>\r\nimport<\/span> org.springframework.web.bind.annotation.RestController<\/span>\r\n\r\n@RestController<\/span>\r\n@RequestMapping<\/span>(<\/span>value<\/span> =<\/span> [<\/span>\"\/api\"<\/span>])<\/span>\r\nclass<\/span> DemoRestController<\/span> {<\/span>\r\n\r\n    @GetMapping<\/span>(<\/span>\r\n            value<\/span> =<\/span> [<\/span>\"\/\"<\/span>],<\/span>\r\n            produces<\/span> =<\/span> [<\/span>MediaType<\/span>.<\/span>APPLICATION_JSON_VALUE<\/span>]<\/span>\r\n            )<\/span>\r\n    fun<\/span> index<\/span>():<\/span> IndexJson<\/span> {<\/span>\r\n        return<\/span> IndexJson<\/span>(<\/span>\"hogehoge\"<\/span>,<\/span> 12345<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\ndata class<\/span> IndexJson<\/span>(<\/span>\r\n        @JsonProperty<\/span>(<\/span>value<\/span> =<\/span> \"name\"<\/span>)<\/span> val<\/span> name<\/span>:<\/span> String<\/span>,<\/span>\r\n        @JsonProperty<\/span>(<\/span>value<\/span> =<\/span> \"no\"<\/span>)<\/span> val<\/span> no<\/span>:<\/span> Int<\/span>\r\n)<\/span>\r\n<\/code><\/pre>\n
\u8fd4\u56de\u7684\u53ea\u662f\u539f\u6837\u7684 Data Class\uff0c\u6240\u4ee5\u975e\u5e38\u65b9\u4fbf\u5462\u3002<\/p>\n
\u5f00\u59cb<\/h3>\n
$ <\/span>.\/gradlew bootRun\r\n<\/code><\/pre>\n
$ <\/span>curl -D<\/span> - http:\/\/localhost:8080\/api\/\r\nHTTP\/1.1 200 OK\r\nDate: Wed, 19 Dec 2018 10:30:50 GMT\r\nContent-Type: application\/json;<\/span>charset<\/span>=<\/span>utf-8\r\nTransfer-Encoding: chunked\r\n\r\n{<\/span>\"name\"<\/span>:\"hogehoge\"<\/span>,\"no\"<\/span>:12345}<\/span>\r\n<\/code><\/pre>\n
\u597d\u7684\uff0c\u8fd4\u56de\u7684\u662fJson\u683c\u5f0f\u7684\u6570\u636e\u3002<\/p>\n
\u6570\u636e\u5e93\u8fde\u63a5<\/h2>\n
\u6211\u8981\u6dfb\u52a0H2\u7684\u5b9a\u4e49\u3002<\/p>\n
spring<\/span>:<\/span>\r\n  main<\/span>:<\/span>\r\n    banner-mode<\/span>:<\/span> \"<\/span>off\"<\/span>\r\n  datasource<\/span>:<\/span>\r\n    url<\/span>:<\/span> jdbc:h2:\/tmp\/h2\/demo<\/span>\r\n    username<\/span>:<\/span> sa<\/span>\r\n    password<\/span>:<\/span>\r\n  h2<\/span>:<\/span>\r\n    console<\/span>:<\/span>\r\n      enabled<\/span>:<\/span> true<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u91cd\u65b0\u542f\u52a8\u5e94\u7528\u7a0b\u5e8f\uff0cH2\u7684Web\u63a7\u5236\u53f0\u5c06\u542f\u52a8\u3002
\n\u60a8\u53ef\u4ee5\u901a\u8fc7”http:\/\/localhost:8080\/h2-console\/”\u8bbf\u95ee\u63a7\u5236\u53f0\u3002<\/p>\n
\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n
\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/div>\n
\u8bf7\u767b\u5f55\u540e\uff0c\u5c06\u4f1a\u663e\u793a\u4e00\u4e2a\u53ef\u4ee5\u6267\u884cSQL\u7684\u9875\u9762\u3002\u8bf7\u968f\u610f\u521b\u5efa\u5e76\u6ce8\u518c\u8868\u683c\u548c\u6570\u636e\u3002<\/p>\n
create<\/span> table<\/span> test<\/span> (<\/span>\r\n  name<\/span> varchar2<\/span>(<\/span>10<\/span>),<\/span>\r\n  no<\/span> int<\/span>\r\n);<\/span>\r\n\r\ninsert<\/span> into<\/span> test<\/span> values<\/span> (<\/span>'hoge1'<\/span>,<\/span> 10<\/span>);<\/span>\r\ninsert<\/span> into<\/span> test<\/span> values<\/span> (<\/span>'hoge2'<\/span>,<\/span> 20<\/span>);<\/span>\r\ninsert<\/span> into<\/span> test<\/span> values<\/span> (<\/span>'hoge3'<\/span>,<\/span> 30<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u4ed3\u5e93\u3001\u670d\u52a1<\/h3>\n
\u521b\u5efa\u4e00\u4e2a\u4ece\u6570\u636e\u5e93\u8868\u4e2d\u83b7\u53d6\u6570\u636e\u7684Repository\u548cService\u3002<\/p>\n
data class<\/span> User<\/span>(<\/span>val<\/span> name<\/span>:<\/span> String<\/span>,<\/span> val<\/span> no<\/span>:<\/span>Int<\/span>)<\/span>\r\n<\/code><\/pre>\n
interface<\/span> DemoRepository<\/span> {<\/span>\r\n    fun<\/span> all<\/span>():<\/span> List<\/span><<\/span>User<\/span>><\/span>\r\n    fun<\/span> findByName<\/span>(<\/span>name<\/span>:<\/span> String<\/span>):<\/span> User<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
import<\/span> com.example.demo.repository.DemoRepository<\/span>\r\nimport<\/span> com.example.demo.repository.User<\/span>\r\nimport<\/span> org.springframework.jdbc.core.RowMapper<\/span>\r\nimport<\/span> org.springframework.jdbc.core.namedparam.MapSqlParameterSource<\/span>\r\nimport<\/span> org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate<\/span>\r\nimport<\/span> org.springframework.stereotype.Repository<\/span>\r\n\r\n@Repository<\/span>\r\nclass<\/span> JdbcDemoRepository<\/span>(<\/span>private<\/span> val<\/span> jdbcTemplate<\/span>:<\/span> NamedParameterJdbcTemplate<\/span>)<\/span> :<\/span> DemoRepository<\/span> {<\/span>\r\n\r\n    private<\/span> val<\/span> rowMapper<\/span> =<\/span> RowMapper<\/span><<\/span>User<\/span>><\/span> {<\/span> rs<\/span>,<\/span> _<\/span> -><\/span>\r\n        User<\/span>(<\/span>\r\n                rs<\/span>.<\/span>getString<\/span>(<\/span>\"name\"<\/span>),<\/span>\r\n                rs<\/span>.<\/span>getInt<\/span>(<\/span>\"no\"<\/span>)<\/span>\r\n        )<\/span>\r\n    }<\/span>\r\n\r\n    override<\/span> fun<\/span> all<\/span>():<\/span> List<\/span><<\/span>User<\/span>><\/span> =<\/span>\r\n        jdbcTemplate<\/span>.<\/span>query<\/span>(<\/span>\"select name, no from test\"<\/span>,<\/span> rowMapper<\/span>)<\/span>\r\n\r\n    override<\/span> fun<\/span> findByName<\/span>(<\/span>name<\/span>:<\/span> String<\/span>):<\/span> User<\/span> {<\/span>\r\n        val<\/span> res<\/span> =<\/span> jdbcTemplate<\/span>.<\/span>query<\/span>(<\/span>\r\n                \"select name, no from test where name = :targetName\"<\/span>,<\/span>\r\n                MapSqlParameterSource<\/span>().<\/span>addValue<\/span>(<\/span>\"targetName\"<\/span>,<\/span> name<\/span>),<\/span>\r\n                rowMapper<\/span>\r\n        )<\/span>\r\n\r\n        return<\/span> res<\/span>.<\/span>requireNoNulls<\/span>()[<\/span>0<\/span>]<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
import<\/span> com.example.demo.repository.User<\/span>\r\n\r\ninterface<\/span> DemoService<\/span> {<\/span>\r\n    fun<\/span> findUser<\/span>(<\/span>name<\/span>:<\/span> String<\/span>):<\/span> User<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
import<\/span> com.example.demo.repository.DemoRepository<\/span>\r\nimport<\/span> com.example.demo.repository.User<\/span>\r\nimport<\/span> com.example.demo.service.DemoService<\/span>\r\nimport<\/span> org.springframework.beans.factory.annotation.Autowired<\/span>\r\nimport<\/span> org.springframework.stereotype.Service<\/span>\r\n\r\n@Service<\/span>\r\nclass<\/span> DemoServiceImpl<\/span>(<\/span>@Autowired<\/span> var<\/span> repository<\/span>:<\/span> DemoRepository<\/span>):<\/span> DemoService<\/span> {<\/span>\r\n    override<\/span> fun<\/span> findUser<\/span>(<\/span>name<\/span>:<\/span> String<\/span>):<\/span> User<\/span> =<\/span> repository<\/span>.<\/span>findByName<\/span>(<\/span>name<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6211\u5c06\u4fee\u6539\u6700\u521d\u521b\u5efa\u7684\u63a7\u5236\u5668\u3002<\/p>\n
import<\/span> com.example.demo.service.DemoService<\/span>\r\nimport<\/span> com.fasterxml.jackson.annotation.JsonProperty<\/span>\r\nimport<\/span> org.springframework.beans.factory.annotation.Autowired<\/span>\r\nimport<\/span> org.springframework.http.MediaType<\/span>\r\nimport<\/span> org.springframework.validation.annotation.Validated<\/span>\r\nimport<\/span> org.springframework.web.bind.annotation.GetMapping<\/span>\r\nimport<\/span> org.springframework.web.bind.annotation.PathVariable<\/span>\r\nimport<\/span> org.springframework.web.bind.annotation.RequestMapping<\/span>\r\nimport<\/span> org.springframework.web.bind.annotation.RestController<\/span>\r\nimport<\/span> javax.validation.Valid<\/span>\r\nimport<\/span> javax.validation.constraints.NotBlank<\/span>\r\n\r\n@Validated<\/span>\r\n@RestController<\/span>\r\n@RequestMapping<\/span>(<\/span>value<\/span> =<\/span> [<\/span>\"\/api\"<\/span>])<\/span>\r\nclass<\/span> DemoRestController<\/span> {<\/span>\r\n\r\n    @Autowired<\/span>\r\n    lateinit<\/span> var<\/span> service<\/span>:<\/span> DemoService<\/span>\r\n\r\n    @GetMapping<\/span>(<\/span>\r\n            value<\/span> =<\/span> [<\/span>\"\/{name}\"<\/span>],<\/span>\r\n            produces<\/span> =<\/span> [<\/span>MediaType<\/span>.<\/span>APPLICATION_JSON_VALUE<\/span>]<\/span>\r\n            )<\/span>\r\n    fun<\/span> index<\/span>(<\/span>@PathVariable<\/span>(<\/span>\"name\"<\/span>)<\/span> @Valid<\/span> @NotBlank<\/span> userName<\/span>:<\/span> String<\/span>):<\/span> IndexJson<\/span> {<\/span>\r\n        val<\/span> user<\/span>=<\/span> service<\/span>.<\/span>findUser<\/span>(<\/span>userName<\/span>)<\/span>\r\n        return<\/span> IndexJson<\/span>(<\/span>user<\/span>.<\/span>name<\/span>,<\/span> user<\/span>.<\/span>no<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\ndata class<\/span> IndexJson<\/span>(<\/span>\r\n        @JsonProperty<\/span>(<\/span>value<\/span> =<\/span> \"name\"<\/span>)<\/span> val<\/span> name<\/span>:<\/span> String<\/span>,<\/span>\r\n        @JsonProperty<\/span>(<\/span>value<\/span> =<\/span> \"no\"<\/span>)<\/span> val<\/span> no<\/span>:<\/span> Int<\/span>\r\n)<\/span>\r\n<\/code><\/pre>\n
\u6211\u5c06\u91cd\u65b0\u542f\u52a8\u5e76\u5c1d\u8bd5\u8c03\u7528API\u3002<\/p>\n
$ <\/span>curl http:\/\/localhost:8080\/api\/hoge1\r\n{<\/span>\"name\"<\/span>:\"hoge1\"<\/span>,\"no\"<\/span>:10}<\/span>\r\n$ <\/span>curl http:\/\/localhost:8080\/api\/hoge2\r\n{<\/span>\"name\"<\/span>:\"hoge2\"<\/span>,\"no\"<\/span>:20}<\/span>\r\n<\/code><\/pre>\n
\u6211\u7684\u611f\u53d7<\/h2>\n
\u6211\u5728\u4f7f\u7528\u65f6\u51e0\u4e4e\u6ca1\u6709\u9047\u5230\u4efb\u4f55\u56f0\u96be\u3002
\n\u8bf4\u5230Spring\uff0c\u4f9d\u8d56\u6ce8\u5165\u662f\u5176\u4e2d\u7684\u4e00\u90e8\u5206\uff0c\u4f46\u5728\u4f7f\u7528Kotlin\u65f6\uff0c\u6211\u5bf9\u5982\u4f55\u58f0\u660e\u5c5e\u6027\u90e8\u5206\u611f\u5230\u56f0\u60d1\uff0c\u5e76\u4e14\u5bf9\u6784\u9020\u51fd\u6570\u7684\u5199\u6cd5\u4e5f\u4e0d\u592a\u719f\u6089\u3002<\/p>\n
\u8ba9\u6211\u4eec\u7ee7\u7eed\u4f7f\u7528 Kotlin\uff0c\u6211\u5bf9\u6b64\u7684\u60f3\u6cd5\u53d8\u5f97\u66f4\u52a0\u575a\u5b9a\u4e86\u3002\u8ba9\u6211\u4eec\u4eab\u53d7 Kotlin \u7684\u4e50\u8da3\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
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