SpringBoot2.0整合jackson配置日期格式化和反序列化的实现

2019-11-26 09:30:25

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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keyspring.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;@SpringBootApplicationpublic 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