springmvc-自定义消息转换器

 1 package com.dzf.converter;
 2 
 3 import java.io.IOException;
 4 import java.nio.charset.Charset;
 5 
 6 import org.springframework.http.HttpInputMessage;
 7 import org.springframework.http.HttpOutputMessage;
 8 import org.springframework.http.MediaType;
 9 import org.springframework.http.converter.AbstractHttpMessageConverter;
10 import org.springframework.http.converter.HttpMessageNotReadableException;
11 import org.springframework.http.converter.HttpMessageNotWritableException;
12 import org.springframework.util.StreamUtils;
13 
14 import com.alibaba.fastjson.JSONObject;
15 import com.dzf.vo.ResultInfo;
16 /**
17  * 自定义消息转换器
18  * @author dingzf
19  * @date 2018年1月20日
20  * @time 19:26:39
21  */
22 public class MyMessageConverter extends AbstractHttpMessageConverter<ResultInfo> {
23 
24         
25     public MyMessageConverter(){
26         super(Charset.forName("utf-8"),new MediaType("application","x-result"));//application/x-result 自己定义的媒体数据类型
27     }
28     
29     //所映射的model
30     @Override
31     protected boolean supports(Class<?> clazz) {
32         return ResultInfo.class.isAssignableFrom(clazz);
33     }
34 
35     @Override
36     protected ResultInfo readInternal(Class<? extends ResultInfo> clazz, HttpInputMessage inputMessage)
37             throws IOException, HttpMessageNotReadableException {
38         String copyToString = StreamUtils.copyToString(inputMessage.getBody(), Charset.forName("utf-8"));//传输为json类型的数据
39         ResultInfo result = (ResultInfo)JSONObject.parse(copyToString);//转换为自己想要的数据类型  按需编写
40         return result;
41     }
42 
43     @Override
44     protected void writeInternal(ResultInfo t, HttpOutputMessage outputMessage)
45             throws IOException, HttpMessageNotWritableException {
46         String str = t.getCode()+"-"+t.getDesc();//返回到前台的数据
47         outputMessage.getBody().write(str.getBytes());
48     }
49 
50 }

 1 <!-- 
 2         打开springmvc的注解模式
 3     mvc 请求映射 处理器与适配器配置 -->
 4     <mvc:annotation-driven >
 5         <mvc:message-converters register-defaults="true">
 6             <bean class="org.springframework.http.converter.StringHttpMessageConverter" ><!--字符串转换器-->
 7             <property name = "supportedMediaTypes">
 8                 <list>
 9                     <value>application/json;charset=utf-8</value>
10                     <value>text/html;charset=utf-8</value>
11                 </list>
12             </property>
13             </bean>
14             <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" /><!--json转换器-->
15             <bean class ="com.dzf.converter.MyMessageConverter"> <!--自己定义的消息转换器-->
16             <property name = "supportedMediaTypes">
17                 <list>
18                     <value>application/json;charset=utf-8</value>
19                     <value>application/x-result;charset=utf-8</value>
20                     <value>text/html;charset=utf-8</value>
21                 </list>
22             </property>
23             </bean>
24         </mvc:message-converters>
25     </mvc:annotation-driven>

 1 function test6(){
 2     $.ajax({
 3         type:‘post‘,
 4         url:‘json/test6‘,
 5         contentType:‘application/x-result‘,
 6         data:{code:"200",desc:"我是丁振锋"},
 7         success:function(text){
 8             alert(text);
 9         },
10         error:function(data){
11             alert("后台异常！")
12         },
13         asyn:false,
14         cache:false
15     });
16 }

 1 /**
 2      * 测试自定义消息转换器
 3      * 在请求头上必须加上produces="application/x-result;charset=utf-8"
 4      * @param request
 5      * @param response
 6      * @return
 7      */
 8     @RequestMapping(value="/test6",produces="application/x-result;charset=utf-8")
 9     @ResponseBody
10     public ResultInfo test6(HttpServletRequest request,HttpServletResponse response){
11         ResultInfo result = new ResultInfo();
12         result.setCode("200");
13         result.setDesc("请求成功！");
14         Map<String,String> map = new HashMap<String,String>();
15         map.put("name", "红霞");
16         map.put("age","22");
17         result.setData(map);
18         return result;
19     }