SpringBoot入门-4（返回fastjson数据）

最新推荐文章于 2024-01-22 22:36:41 发布

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#SpringBoot #fengsi #json

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本文介绍如何在Spring Boot项目中集成FastJSON实现JSON数据处理。通过配置POM文件引入所需依赖，创建控制器返回JSON数据，并自定义日期格式。演示了如何通过App类配置FastJSON的转换器。

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一、POM.XML文件

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.fs</groupId>
  <artifactId>springboot_json_3</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>springboot_json_3 Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <!-- spring boot 父节点依赖,引入这个之后相关的引入就不需要添加version配置，spring boot会自动选择最合适的版本进行添加。 -->
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.1.RELEASE</version>
	</parent>
	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<!-- 指定一下jdk的版本 ，这里我们使用jdk 1.8 ,默认是1.6 -->
		<java.version>1.8</java.version>
	</properties>
	<dependencies>
		<!-- spring-boot-starter-web: MVC,AOP的依赖包.... -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<!-- <version></version> 由于我们在上面指定了 parent(spring boot) -->
		</dependency>
			<!-- 添加fastjson 依赖包. -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.15</version>
		</dependency>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
	</dependencies>
  <build>
    <finalName>springboot_json_3</finalName>
  </build>
</project>

二、HelloController.java

package com.fs;

import java.util.Date;

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

@RestController
public class HelloController {

    @RequestMapping("/getJson")
    public Demo getJson() {
        Demo demo = new Demo();
        demo.setId(1);
        demo.setName("张三");
        demo.setCreateTime(new Date());
        return demo;
    }
}

三、Demo.java

package com.fs;

import java.util.Date;

import com.alibaba.fastjson.annotation.JSONField;

public class Demo {

    private int    id;
    private String name;
    // com.alibaba.fastjson.annotation.JSONField
    @JSONField(format = "yyyy-MM-dd HH:mm")
    private Date   createTime;

    public int getId() {
        return id;
    }

    public Date getCreateTime() {
        return createTime;
    }

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

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

}

四、App.java

package com.fs;

import java.util.List;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
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;

@SpringBootApplication
public class App extends WebMvcConfigurerAdapter {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        super.configureMessageConverters(converters);
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastConverter.setDateFormat("yyyy-MM-dd HH:mm:ss");
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        fastConverter.setFastJsonConfig(fastJsonConfig);
        converters.add(fastConverter);
    }

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

}

五、运行