SpringMVC整合fastjson、easyui 乱码问题

一、框架版本

SpringMVC：3.1.1.RELEASE

fastjson：1.2.7

easyui ：1.4.5

二、乱码现象

   Action中使用@ResponseBody返回Json数据

  1、Action返回的数据正常，无乱码现象

  2、使用浏览器的开发者模式查看返回值，发现乱码

可以确定乱码问题出现在数据返回到浏览器的过程中

三、解决过程

1、最常规的方法，添加message-converters，添加后如json-lib库可以解决乱码问题，但是fastjson无法解决（未解决）

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<mvc:annotation-driven>          <mvc:message-converters register-defaults="true">             <bean class="org.springframework.http.converter.StringHttpMessageConverter">               <property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" />             </bean>            </mvc:message-converters>      </mvc:annotation-driven>

2、实现AbstractHttpMessageConverter抽象类（未解决）

http://xyly624.blog.51cto.com/842520/896704

该方法解决了返回乱码问题，但是easyui无法显示数据（有数据但是显示为空，原因不明）

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public class MappingFastJsonHttpMessageConverter extends         AbstractHttpMessageConverter<Object> {     public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");        private SerializerFeature[] serializerFeature;        public SerializerFeature[] getSerializerFeature() {         return serializerFeature;     }        public void setSerializerFeature(SerializerFeature[] serializerFeature) {         this.serializerFeature = serializerFeature;     }        public MappingFastJsonHttpMessageConverter() {         super(new MediaType("application", "json", DEFAULT_CHARSET));     }        @Override     public boolean canRead(Class<?> clazz, MediaType mediaType) {         return true;     }        @Override     public boolean canWrite(Class<?> clazz, MediaType mediaType) {         return true;     }        @Override     protected boolean supports(Class<?> clazz) {         throw new UnsupportedOperationException();     }        @Override     protected Object readInternal(Class<?> clazz, HttpInputMessage inputMessage)     throws IOException, HttpMessageNotReadableException {         ByteArrayOutputStream baos = new ByteArrayOutputStream();         int i;         while ((i = inputMessage.getBody().read()) != -1) {             baos.write(i);         }         return JSON.parseArray(baos.toString(), clazz);     }        @Override     protected void writeInternal(Object o, HttpOutputMessage outputMessage)     throws IOException, HttpMessageNotWritableException {         String jsonString = JSON.toJSONString(o, serializerFeature);         OutputStream out = outputMessage.getBody();         out.write(jsonString.getBytes(DEFAULT_CHARSET));         out.flush();     } }

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<mvc:annotation-driven>     <mvc:message-converters register-defaults="true">                <!-- fastjosn spring support -->         <bean id="jsonConverter" class="com.alibaba.fastjson.spring.support.MappingFastJsonHttpMessageConverter">             <property name="supportedMediaTypes" value="application/json" />             <property name="serializerFeature">                 <list>                     <value>WriteMapNullValue</value>                     <value>QuoteFieldNames</value>                 </list>             </property>         </bean>     </mvc:message-converters> </mvc:annotation-driven>

3、@RequestMapping添加produces = "text/html;charset=UTF-8"，在Controller或Action添加均可（解决问题）

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