Controller返回json的编码处理

不久前在Spring mvc的框架体系下，js端发送ajax请求时，获取的结果为json时会出现中文乱码。经排查是由于我的spring3.2.0 配置问题。在Controller端返回的json结果需要进行Jackson的处理。涉及到的jar包：　　jackson-core、jackson-databind、jackson-annotationspring-servlet.xml配置添加：

<mvc:annotation-driven>
<mvc:message-converters>
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/plain;charset=UTF-8</value>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
<bean
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>application/json; charset=UTF-8</value>
<value>application/x-www-form-urlencoded; charset=UTF-8</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>

<mvc:annotation-driven>自动注册：　　org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping　　org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter所以这两个bean不用追加到drven里了。StringHttpMessageConverter：
　　不仅可以解决中文乱码，还可以将json里的换行|r|n去掉;MappingJackson2HttpMessageConverter:　　控制@ResponseBody注解返回的json格式。Controller里处理代码如下：　　

@RequestMapping(value="myprofile/base.json",method = RequestMethod.GET)
@ResponseBody
public String loadSession(Model model,
@RequestParam("appid")String appid,
@RequestParam("appkey")String appkey,
@RequestParam("openid")String openid,
@RequestParam("pf")String pf,
@RequestParam("openkey")String openkey,
HttpServletRequest request,
HttpServletResponse response){
response.setHeader("Charset", "UTF-8");
response.setContentType("application/x-www-form-urlencoded; charset=utf-8");

String serverName =Constant.serverName;

OpenApiV3 apiV3 =new OpenApiV3(appid, appkey);

apiV3.setServerName(serverName);
String protocol ="http";
String scriptName="/v3/user/get_info";

String result =getUserInfo(apiV3, scriptName, openid, openkey, protocol,pf);

return result;
}

Js端请求代码如下：

$j.ajax(
{
type: "get",
async: false,
url: getUserInfo,
contentType: "application/x-www-form-urlencoded; charset=utf-8",
data: {
'appid':appid,
'appkey':appkey,
'openid':openid,
'openkey':openkey,
'pf':pf
},
dataType: "json",
cache: false,
success: function (data) {
if(data.ret=='1002'){
//登陆失效，需重新登陆
fusion2.dialog.relogin();
}else{
$j("#userinfo").html("用户信息:<br>"+data);
}
},
error: function (err) {
alert(err);
}
}

);

效果：