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();
}
}1
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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）