一、项目准备
直接使用上个章节的源码
二、添加依赖
从spring-boot-starter-web里去除spring-boot-starter-json依赖，添加fastjson依赖：
<!-- Spring Boot web启动器 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-json</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.47</version>
</dependency>
三、配置fastjson
方法一：注入bean方式
在启动类Application里添加public HttpMessageConverters fastJsonHttpMessageConverters()方法：
package com.songguoliang.springboot;
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.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.http.converter.HttpMessageConverter;
import tk.mybatis.spring.annotation.MapperScan;
/**
* @Description
* @Author sgl
* @Date 2018-05-02 14:51
*/
@SpringBootApplication
@MapperScan("com.songguoliang.springboot.mapper")
public class Application{
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
/**
* 覆盖方法configureMessageConverters，使用fastJson
* @return
*/
@Bean
public HttpMessageConverters fastJsonHttpMessageConverters() {
//1、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
FastJsonConfig fastJsonConfig = new FastJsonConfig();
fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
//3、在convert中添加配置信息
fastConverter.setFastJsonConfig(fastJsonConfig);
//4、将convert添加到converters中
HttpMessageConverter<?> converter = fastConverter;
return new HttpMessageConverters(converter);
}
}
方法二：重写configureMessageConverters()方法的方式
- 启动类实现org.springframework.web.servlet.config.annotation.WebMvcConfigurer接口
- 重写public void configureMessageConverters(List<HttpMessageConverter<?>> converters)方法。
package com.songguoliang.springboot;
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.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import tk.mybatis.spring.annotation.MapperScan;
import java.util.List;
/**
* @Description
* @Author sgl
* @Date 2018-05-02 14:51
*/
@SpringBootApplication
@MapperScan("com.songguoliang.springboot.mapper")
public class Application implements WebMvcConfigurer {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
//1、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
FastJsonConfig fastJsonConfig = new FastJsonConfig();
fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
//3、在convert中添加配置信息
fastConverter.setFastJsonConfig(fastJsonConfig);
//4、将convert添加到converters中
converters.add(fastConverter);
}
}
四、创建测试对象
创建一个model包，然后在该包里创建一个FastjsonTest实体，这个实体里，通过@JSONField注解，格式化date字段的值，并且不把ignore字段返回到前台，内容如下：
package com.songguoliang.springboot.model;
import com.alibaba.fastjson.annotation.JSONField;
import java.util.Date;
/**
* @Description
* @Author sgl
* @Date 2018-05-08 13:50
*/
public class FastjsonTest {
private Integer id;
private String string;
/**
* 格式化日期
*/
@JSONField(format = "yyyy-MM-dd HH:mm:ss")
private Date date;
/**
* 转换为json时不包括该属性
*/
@JSONField(serialize = false)
private String ignore;
//省略getter、setter
}
五、创建Controller
创建一个TestController，内容如下：
package com.songguoliang.springboot.controller;
import com.songguoliang.springboot.model.FastjsonTest;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.Date;
/**
* @Description
* @Author sgl
* @Date 2018-05-08 13:55
*/
@RestController
public class TestController {
@GetMapping("/fastjson")
public FastjsonTest getFastJson() {
FastjsonTest fastjsonTest = new FastjsonTest();
fastjsonTest.setId(1);
fastjsonTest.setString("fastjson test");
fastjsonTest.setIgnore("ignore field");
fastjsonTest.setDate(new Date());
return fastjsonTest;
}
}
六、启动服务查看测试结果
启动结果，在浏览器上输入：http://localhost:8080/fastjson，结果如下：
可以看到，date字段值的格式是我们设置好的yyyy-MM-dd HH:mm:ss,而且ignore字段没有显示出来。