場景

1.SpringBoot默認配置的是Jackson。

2.項目搭建專欄：

https://blog.csdn.net/BADAO_LIUMANG_QIZHI/column/info/35688

實現

引入fastJson的依賴

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

實現方式1

通過繼承WebMvcConfigurerAdapter來實現

找到springBoot的啟動類

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{@Overridepublic void configureMessageConverters(List<HttpMessageConverter<?>> converters) {//創建FastJson的消息轉換器FastJsonHttpMessageConverter convert = new FastJsonHttpMessageConverter();//創建FastJson的配置對象FastJsonConfig config = new FastJsonConfig();//對Json數據進行格式化config.setSerializerFeatures(SerializerFeature.PrettyFormat);convert.setFastJsonConfig(config);converters.add(convert);}public static void main(String[] args) {SpringApplication.run(HelloSpringBootApplication.class, args);}}

通過extends WebMvcConfigurerAdapter并重寫configureMessageConverters方法來實現。

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("流氓氣質");user.setDate(new Date());return user;} }

?

新建pojo

user.javapackage 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;}}

運行看效果

?

實現方式2

在項目啟動類中

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 {@Beanpublic HttpMessageConverters fastJsonMessageConverter() {//創建FastJson的消息轉換器FastJsonHttpMessageConverter convert = new FastJsonHttpMessageConverter();//創建FastJson的配置對象FastJsonConfig config = new FastJsonConfig();//對Json數據進行格式化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);}}

同樣運行效果

源碼下載

https://download.csdn.net/download/badao_liumang_qizhi/11074485

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