网上杂七杂八的说法不一，大多数都是抄来抄去，没有实践，近期在项目频繁遇到boot+jackson处理日期的问题，故开此贴。

首先是POM

<?xml version="1.0" encoding="UTF-8"?> <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/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>io.cj.learning</groupId> <artifactId>boot2exam</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>boot2exam</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.0.RELEASE</version> <relativePath/> <!-- lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>RELEASE</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <version>RELEASE</version> <scope>compile</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> 

 

然后是yml文件

（当然yml这东西很多人不喜欢，我也写了个properties版本的）

spring: jackson: #参数意义： #JsonInclude.Include.ALWAYS 默认 #JsonInclude.Include.NON_DEFAULT 属性为默认值不序列化 #JsonInclude.Include.NON_EMPTY 属性为 空（””） 或者为 NULL 都不序列化 #JsonInclude.Include.NON_NULL 属性为NULL 不序列化 default-property-inclusion: ALWAYS time-zone: GMT+8 date-format: yyyy-MM-dd HH:mm:ss

上面配置对应的properties文件版本：

#jackson相关配置 spring.jackson.date-format = yyyy-MM-dd HH:mm:ss #时区必须要设置 spring.jackson.time-zone= GMT+8 #ALWAYS的意思是即时属性为null，仍然也会输出这个key spring.jackson.default-property-inclusion=ALWAYS

 

然后来定义一个Controller和JAVA Bean

Controller：

package io.cj.learning.boot2exam.controller; import io.cj.learning.boot2exam.model.DateFormatTest; import org.springframework.web.bind.annotation.*; import java.text.SimpleDateFormat; import java.util.Date; @RestController @RequestMapping(value="/test") public class TestController { /** * 测试时间序列化, java.util.date 类型 -> String * @return */ @RequestMapping(value="/dateFormatTest", method = RequestMethod.GET) @ResponseBody public DateFormatTest dateFormatTest(){ DateFormatTest dateFormatTest = new DateFormatTest(); dateFormatTest.setIntProperties(100); dateFormatTest.setDateProperties(new Date()); return dateFormatTest; } /** * 测试时间反序列化 String -> java.util.date 类型 */ @RequestMapping(value="/dateFormatTest2" ,method = RequestMethod.POST) public void dateFormatTest2(@RequestBody DateFormatTest model){ SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); System.out.println(model.getIntProperties()); System.out.println(sdf.format(model.getDateProperties())); System.out.println(model.getStrProperties()); } } 

 

Java Bean：

package io.cj.learning.boot2exam.model; import java.util.Date; /** * 一个model，里面带一个日期类型 */ public class DateFormatTest { private Integer intProperties; private Date dateProperties; private String strProperties; public Integer getIntProperties() { return intProperties; } public void setIntProperties(Integer intProperties) { this.intProperties = intProperties; } public Date getDateProperties() { return dateProperties; } public void setDateProperties(Date dateProperties) { this.dateProperties = dateProperties; } public String getStrProperties() { return strProperties; } public void setStrProperties(String strProperties) { this.strProperties = strProperties; } } 

 

启动主类：

package io.cj.learning.boot2exam; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class Boot2examApplication { public static void main(String[] args) { SpringApplication.run(Boot2examApplication.class, args); } } 

 

测试：

试一下，首先是日期序列化， 请求一下试试 

然后是反序列化，也请求一个试试：