SpringBoot中使用FastJson解析Json数据

场景

1.SpringBoot默认配置的是Jackson。

实现

引入fastJson的依赖

<!-- fastjson的依赖 -->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>fastjson</artifactId>
   <version>1.2.15</version>
  </dependency>

实现方式1

通过继承WebMvcConfigurerAdapter来实现

找到springBoot的启动类

package com.example.demo;

import java.util.List;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
@MapperScan("com.example.demo.mapper")
@SpringBootApplication(scanBasePackages= {"com.example.demo.controller","com.example.demo.service"})
public class HelloSpringBootApplication extends WebMvcConfigurerAdapter{



 @Override
 public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
  
  //创建FastJson的消息转换器
  FastJsonHttpMessageConverter convert = new FastJsonHttpMessageConverter();
  //创建FastJson的配置对象
  FastJsonConfig config = new FastJsonConfig();
  //对Json数据进行格式化
  config.setSerializerFeatures(SerializerFeature.PrettyFormat);
  convert.setFastJsonConfig(config);
  converters.add(convert);
 }
 
 
 
 public static void main(String[] args) {
  
  SpringApplication.run(HelloSpringBootApplication.class, args);
 }

}

通过extends WebMvcConfigurerAdapter并重写configureMessageConverters方法来实现。

新建Controller

package com.example.demo.controller;

import java.util.Date;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import com.example.demo.pojo.User;

@Controller
public class TestFastjsonController {
 @ResponseBody
 @RequestMapping("/testFastJson")
 public Object show() {
  
  User user =new User();
  user.setId(1);
  user.setUsername("霸道");
  user.setPassword("流氓气质");
  user.setDate(new Date());
  
  return user;
 }
}

新建pojo

user.java

package com.example.demo.pojo;

import java.util.Date;

import com.alibaba.fastjson.annotation.JSONField;

public class User {
 private Integer id;
 private String username;
 private String password;
 @JSONField(format="yyyy-MM-dd")
 private Date date;
 public Integer getId() {
  return id;
 }
 public Date getDate() {
  return date;
 }
 public void setDate(Date date) {
  this.date = date;
 }
 public void setId(Integer id) {
  this.id = id;
 }
 public String getUsername() {
  return username;
 }
 public void setUsername(String username) {
  this.username = username;
 }
 public String getPassword() {
  return password;
 }
 public void setPassword(String password) {
  this.password = password;
 }

}

运行看效果

实现方式2

在项目启动类中

package com.example.demo;

import java.util.List;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
@MapperScan("com.example.demo.mapper")
@SpringBootApplication(scanBasePackages= {"com.example.demo.controller","com.example.demo.service"})
public class HelloSpringBootApplication
{



 
 @Bean
 public HttpMessageConverters fastJsonMessageConverter() {
  
    //创建FastJson的消息转换器
    FastJsonHttpMessageConverter convert = new FastJsonHttpMessageConverter();
    //创建FastJson的配置对象
    FastJsonConfig config = new FastJsonConfig();
    //对Json数据进行格式化
    config.setSerializerFeatures(SerializerFeature.PrettyFormat);
    convert.setFastJsonConfig(config);
    HttpMessageConverter<?> con =convert;
    return new HttpMessageConverters(con);
 }
 
 public static void main(String[] args) {
  
  SpringApplication.run(HelloSpringBootApplication.class, args);
 }

}

同样运行效果