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feat: 增加 Jackson 相关操作(https://www.wdbyte.com/tool/jackson.html)
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‎tool-java-jackson/README.md‎

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## tool-java-jackson
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### 相关文章
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- [Jackson 解析 JSON 教程](https://www.wdbyte.com/tool/jackson.html)

‎tool-java-jackson/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<parent>
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<artifactId>parent-modules</artifactId>
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<groupId>com.wdbyte</groupId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.wdbyte.jackson</groupId>
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<artifactId>tool-java-jackson</artifactId>
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<properties>
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<maven.compiler.source>8</maven.compiler.source>
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<maven.compiler.target>8</maven.compiler.target>
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</properties>
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<dependencies>
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<dependency>
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<groupId>com.fasterxml.jackson.core</groupId>
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<artifactId>jackson-databind</artifactId>
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<version>2.13.3</version>
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</dependency>
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<dependency>
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<groupId>com.fasterxml.jackson.datatype</groupId>
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<artifactId>jackson-datatype-jsr310</artifactId>
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<version>2.13.3</version>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter</artifactId>
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<version>5.8.2</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>

‎tool-java-jackson/src/EmployeeList.json‎

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[
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{
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"name": "aLang",
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"age": 27,
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"skillList": [
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"java",
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"c++"
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]
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},
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{
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"name": "darcy",
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"age": 26,
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"skillList": [
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"go",
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"rust"
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]
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}
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]

‎tool-java-jackson/src/Person.json‎

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{
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"name": "aLang",
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"age": 27,
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"skillList": [
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"java",
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"c++"
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]
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}

‎tool-java-jackson/src/main/java/com/wdbyte/jackson/Cat.java‎

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package com.wdbyte.jackson;
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import com.fasterxml.jackson.annotation.JsonGetter;
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import com.fasterxml.jackson.annotation.JsonIgnore;
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import com.fasterxml.jackson.annotation.JsonSetter;
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import lombok.Data;
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/**
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* @author https://www.wdbyte.com
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* @date 2022/07/17
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*/
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@Data
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public class Cat {
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@JsonSetter(value = "catName")
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private String name;
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private Integer age;
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@JsonGetter(value = "catName")
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public String getName() {
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return name;
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}
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}

‎tool-java-jackson/src/main/java/com/wdbyte/jackson/Order.java‎

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package com.wdbyte.jackson;
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import java.time.LocalDateTime;
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import java.util.Date;
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import com.fasterxml.jackson.annotation.JsonFormat;
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import com.fasterxml.jackson.annotation.JsonGetter;
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import com.fasterxml.jackson.annotation.JsonSetter;
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import lombok.AllArgsConstructor;
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import lombok.Data;
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import lombok.NoArgsConstructor;
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import lombok.ToString;
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/**
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* @author https://www.wdbyte.com
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* @date 2022/07/17
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*/
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//@Data
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@AllArgsConstructor
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@NoArgsConstructor
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@ToString
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public class Order {
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@JsonSetter(value = "orderId")
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private Integer id;
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@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "Asia/Shanghai")
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private Date createTime;
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@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "Asia/Shanghai")
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private LocalDateTime updateTime;
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//@JsonGetter(value = "orderId")
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public Integer getId() {
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return id;
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}
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public void setId(Integer id) {
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this.id = id;
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}
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public Date getCreateTime() {
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return createTime;
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}
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public void setCreateTime(Date createTime) {
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this.createTime = createTime;
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}
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public LocalDateTime getUpdateTime() {
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return updateTime;
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}
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public void setUpdateTime(LocalDateTime updateTime) {
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this.updateTime = updateTime;
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}
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}

‎tool-java-jackson/src/main/java/com/wdbyte/jackson/Person.java‎

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package com.wdbyte.jackson;
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import java.util.List;
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import lombok.Data;
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/**
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* @author https://www.wdbyte.com
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* @date 2022/07/16
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*/
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@Data
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public class Person {
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private String name;
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private Integer age;
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private List<String> skillList;
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}
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‎tool-java-jackson/src/main/java/com/wdbyte/jackson/Student.java‎

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package com.wdbyte.jackson;
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import java.util.HashMap;
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import java.util.Map;
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import com.fasterxml.jackson.annotation.JsonAnyGetter;
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import com.fasterxml.jackson.annotation.JsonAnySetter;
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import com.google.common.collect.Maps;
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import lombok.AllArgsConstructor;
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import lombok.Data;
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import lombok.Getter;
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import lombok.NoArgsConstructor;
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import lombok.Setter;
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import lombok.ToString;
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/**
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* @author https://www.wdbyte.com
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* @date 2022/07/17
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*/
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@ToString
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@AllArgsConstructor
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@NoArgsConstructor
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public class Student {
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@Getter
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@Setter
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private String name;
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@Getter
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@Setter
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private Integer age;
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@Getter
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@Setter
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private Map<String, Object> diyMap = new HashMap<>();
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@JsonAnyGetter
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private Map<String, Object> initMap = new HashMap() {{
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put("a", 111);
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put("b", 222);
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put("c", 333);
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}};
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@JsonAnySetter
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public void otherField(String key, String value) {
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this.diyMap.put(key, value);
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}
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}

‎tool-java-jackson/src/test/java/com/wdbyte/jackson/CatTest.java‎

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package com.wdbyte.jackson;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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/**
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* @author https://www.wdbyte.com
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* @date 2022/07/17
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*/
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class CatTest {
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ObjectMapper objectMapper = new ObjectMapper();
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@Test
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void testPojoToJson() throws JsonProcessingException {
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Cat cat = new Cat();
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cat.setName("Tom");
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cat.setAge(2);
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String json = objectMapper.writeValueAsString(cat);
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System.out.println(json);
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Assertions.assertEquals(json, "{\"name\":\"Tom\"}");
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cat = objectMapper.readValue(json, Cat.class);
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Assertions.assertEquals(cat.getName(), "Tom");
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Assertions.assertEquals(cat.getAge(), null);
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}
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@Test
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void testJsonToPojo() throws JsonProcessingException {
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String json = "{\"name\":\"tom\"}";
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Cat cat = objectMapper.readValue(json, Cat.class);
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Assertions.assertEquals(cat.getName(), "Tom");
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Assertions.assertEquals(cat.getAge(), null);
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}
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@Test
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void testPojoToJson2() throws JsonProcessingException {
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String json = "{\"age\":2,\"catName\":\"Tom\"}";
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Cat cat = objectMapper.readValue(json, Cat.class);
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System.out.println(cat.toString());
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Assertions.assertEquals(cat.getName(), "Tom");
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}
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}

‎tool-java-jackson/src/test/java/com/wdbyte/jackson/OrderTest.java‎

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package com.wdbyte.jackson;
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import java.time.LocalDateTime;
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import java.util.Date;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import org.junit.jupiter.api.Assertions;
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import org.junit.jupiter.api.Test;
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/**
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* @author https://www.wdbyte.com
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* @date 2022/07/17
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*/
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class OrderTest {
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ObjectMapper objectMapper = new ObjectMapper().findAndRegisterModules();
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//ObjectMapper objectMapper = new ObjectMapper();
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@Test
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void testPojoToJson() throws JsonProcessingException {
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Order order = new Order(1, new Date(), LocalDateTime.now());
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String json = objectMapper.writeValueAsString(order);
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System.out.println(json);
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order = objectMapper.readValue(json, Order.class);
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System.out.println(order.toString());
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Assertions.assertEquals(order.getId(), 1);
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}
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@Test
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void testPojoToJson0() throws JsonProcessingException {
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Order order = new Order(1, new Date(), null);
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String json = objectMapper.writeValueAsString(order);
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System.out.println(json);
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order = objectMapper.readValue(json, Order.class);
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System.out.println( order.toString());
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Assertions.assertEquals(order.getId(), 1);
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}
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}

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