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);