IntelliJ IDEA 2017版开发SpringBoot之fastJsonHttpMessageConvert使用

继承WebMvcConfigurerAdapter,改写成自己的json转换工具的写法

1、建立实体类

 package com.fastjson;

 import com.alibaba.fastjson.annotation.JSONField;

 import java.util.Date;

 /**
  * Created by liuya on 2018-01-17.
  */
 public class UserPoJo
 {
     private int userId;
     private String userName;
     @JSONField(format="yyyy-MM-dd HH:mm:ss")
     private Date createTime;

     public Date getCreateTime() {
         return createTime;
     }

     public void setCreateTime(Date createTime) {
         this.createTime = createTime;
     }

     public int getUserId() {
         return userId;
     }

     public void setUserId(int userId) {
         this.userId = userId;
     }

     public String getUserName() {
         return userName;
     }

     public void setUserName(String userName) {
         this.userName = userName;
     }

     @Override
     public String toString() {
         return "UserPoJo{" +
                 "userId=" + userId +
                 ", userName='" + userName + '\'' +
                 ", createTime=" + createTime +
                 '}';
     }
 }

注意：

@JSONField(format="yyyy-MM-dd HH:mm:ss")的使用是自定义格式

2、建立模拟服务器程序

 package com.fastjson;

 import com.alibaba.fastjson.serializer.SerializerFeature;
 import com.alibaba.fastjson.support.config.FastJsonConfig;
 import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.http.MediaType;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

 import java.util.ArrayList;
 import java.util.List;

 /**
  * 模拟开启的服务器
  */

 @SpringBootApplication
 public class SpringboothelloApplication extends WebMvcConfigurerAdapter{

     /**
      //     * 在这里我们使用 @Bean注入 fastJsonHttpMessageConvert
      //     * @return
      //     */
     @Override
     public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {

         // 1、需要先定义一个 convert 转换消息的对象;
         FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();

         //2、添加fastJson 的配置信息，比如：是否要格式化返回的json数据;
         FastJsonConfig fastJsonConfig = new FastJsonConfig();
         fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);

         //处理中文乱码
         List<MediaType> fastMediaTypes = new ArrayList<>();
         fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
         fastConverter.setSupportedMediaTypes(fastMediaTypes);

         //3、在convert中添加配置信息.
         fastConverter.setFastJsonConfig(fastJsonConfig);

         HttpMessageConverter<?> converter = fastConverter;
         converters.add(fastConverter);
     }

     public static void main(String[] args) {
         SpringApplication.run(SpringboothelloApplication.class, args);
     }

 }

注意：测试程序测试前启动

3、测试用的Controller

 package com.fastjson;

 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;

 import java.util.Date;

 /**
  * Created by liuya on 2018-01-16.
  *
  *  测试用的一个helloworld例子
  */

 @RestController
 public class ControllerJson {

     @RequestMapping("user")
     public UserPoJo hello(){
         //实体类赋值
         UserPoJo userPoJo  = new UserPoJo();
         userPoJo.setUserId(111);
         userPoJo.setUserName("王小二");
         userPoJo.setCreateTime(new Date());
         //返回实体类
         return userPoJo;
     }
 }

4、测试结果

5、遇到问题字符编码错误

6、解决在SpringboothelloApplication中加入如下代码解决

             //处理中文乱码
         List<MediaType> fastMediaTypes = new ArrayList<>();
              fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
          fastConverter.setSupportedMediaTypes(fastMediaTypes);