springboot使用gson解析返回数据

1.移除默认的jackson

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<dependency>             <groupId>org.springframework.boot</groupId>             <artifactId>spring-boot-starter-web</artifactId>                           <exclusions>                             <!--忽略内嵌tomcat，打包部署到tomcat。注*本地运行的时候要把这一段忽略引入个注释掉，要不然项目启动不了 --> <!--                            <exclusion>--> <!--                                <groupId>org.springframework.boot</groupId>--> <!--                                <artifactId>spring-boot-starter-tomcat</artifactId>--> <!--                            </exclusion>-->                               <!-- 去除默认的jackson -->                             <exclusion>                                 <artifactId>jackson-core</artifactId>                                 <groupId>com.fasterxml.jackson.core</groupId>                             </exclusion>                             <exclusion>                                 <artifactId>jackson-databind</artifactId>                                 <groupId>com.fasterxml.jackson.core</groupId>                             </exclusion>                         </exclusions>         </dependency>

 

 2.添加gson依赖

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<!-- gson json解析工具类 -->         <dependency>             <groupId>com.google.code.gson</groupId>             <artifactId>gson</artifactId>             <version>2.8.2</version>         </dependency>

 3.添加配置类GsonConfig

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package com.zbbz.framework.config;   import com.google.gson.*; import org.springframework.boot.autoconfigure.http.HttpMessageConverters; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.converter.HttpMessageConverter; import org.springframework.http.converter.json.GsonHttpMessageConverter; import springfox.documentation.spring.web.json.Json;   import java.lang.reflect.Type; import java.util.ArrayList; import java.util.Collection;     @Configuration public class GsonConfig implements JsonSerializer<Json> {       @Bean     public HttpMessageConverters customConverters() {           Collection<HttpMessageConverter<?>> messageConverters = new ArrayList<>();         GsonHttpMessageConverter gsonHttpMessageConverter = new GsonHttpMessageConverter();         gsonHttpMessageConverter.setGson(                 new GsonBuilder() //                        将时间类型统一序列化为长整型，方便前后端通信 //                        .registerTypeAdapter(java.util.Date.class, new DateSerializer()).setDateFormat(DateFormat.LONG) //                        将时间类型统一反序列化为Date型，方便前后端通信 //                        .registerTypeAdapter(java.util.Date.class, new DateDeserializer()).setDateFormat(DateFormat.LONG) //                        将长整型统一换成字符串 //                        .registerTypeAdapter(Long.class, new LongSerializer()) //                        将整型统一换成字符串 //                        .registerTypeAdapter(Integer.class, new IntegerSerializer())                         .setDateFormat("yyyy-MM-dd HH:mm:ss")//日期格式化                         .registerTypeAdapter(Json.class, new GsonConfig())                         .create());         messageConverters.add(gsonHttpMessageConverter);           return new HttpMessageConverters(true, messageConverters);     }       @SuppressWarnings("deprecation")     @Override     public JsonElement serialize(Json json, Type type, JsonSerializationContext context) {         final JsonParser parser = new JsonParser();         return parser.parse(json.value());     } }

 4.添加配置类GsonHttpMessageConverterConfiguration

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package com.zbbz.framework.config;   import com.google.gson.Gson; import org.springframework.boot.autoconfigure.condition.ConditionalOnBean; import org.springframework.boot.autoconfigure.condition.ConditionalOnClass; import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingClass; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.converter.json.GsonHttpMessageConverter;   @Configuration @ConditionalOnClass(Gson.class) @ConditionalOnMissingClass("com.fasterxml.jackson.core.JsonGenerator") @ConditionalOnBean(Gson.class) public class GsonHttpMessageConverterConfiguration {     @Bean     @ConditionalOnMissingBean     public GsonHttpMessageConverter gsonHttpMessageConverter(Gson gson) {         GsonHttpMessageConverter converter = new GsonHttpMessageConverter();         converter.setGson(gson);         return converter;     } }

 

 5.启动类中排除jackson

@SpringBootApplication(exclude = {JacksonAutoConfiguration.class})