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Java json 库示例
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‎codes/javalib/json/pom.xml‎

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<?xml version="1.0"?>
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<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
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xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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<modelVersion>4.0.0</modelVersion>
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<groupId>io.github.dunwu.javalib</groupId>
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<artifactId>javalib-json</artifactId>
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<version>1.0.0</version>
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<packaging>jar</packaging>
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<name>JavaLib Demos - Json</name>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<java.version>1.8</java.version>
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<maven.compiler.source>${java.version}</maven.compiler.source>
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<maven.compiler.target>${java.version}</maven.compiler.target>
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</properties>
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<dependencies>
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<dependency>
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<groupId>com.alibaba</groupId>
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<artifactId>fastjson</artifactId>
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<version>1.2.56</version>
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</dependency>
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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>2.9.8</version>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<resources>
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<resource>
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<filtering>true</filtering>
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<directory>src/main/resources</directory>
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</resource>
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</resources>
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</build>
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</project>

‎codes/javalib/json/src/test/java/io/github/dunwu/javalib/json/Person.java‎

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package io.github.dunwu.javalib.json;
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public class Person {
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private String name;
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private int age;
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public Person() {}
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public Person(String name, int age) {
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this.name = name;
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this.age = age;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public int getAge() {
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return age;
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}
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public void setAge(int age) {
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this.age = age;
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}
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@Override
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public String toString() {
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return "Person{" + "name='" + name + '\'' + ", age=" + age + '}';
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}
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}

‎codes/javalib/json/src/test/java/io/github/dunwu/javalib/json/fastjson/FastjsonAnnotationBean.java‎

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package io.github.dunwu.javalib.json.fastjson;
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import com.alibaba.fastjson.annotation.JSONField;
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import java.util.Date;
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/**
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* @author Zhang Peng
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* @date 2019-03-18
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*/
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public class FastjsonAnnotationBean {
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private int id;
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// 配置date序列化和反序列使用yyyyMMdd日期格式
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@JSONField(format = "yyyy-MM-dd")
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private Date date1;
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// 不序列化
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@JSONField(serialize = false)
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private Date date2;
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// 不反序列化
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@JSONField(deserialize = false)
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private Date date3;
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// 按ordinal排序
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@JSONField(ordinal = 2)
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private int f1;
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@JSONField(ordinal = 1)
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private int f2;
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public FastjsonAnnotationBean() { }
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public FastjsonAnnotationBean(int id, Date date1, Date date2, Date date3, int f1, int f2) {
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this.id = id;
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this.date1 = date1;
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this.date2 = date2;
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this.date3 = date3;
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this.f1 = f1;
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this.f2 = f2;
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}
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@JSONField(name = "ID")
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private int getId() {
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return id;
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}
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private void setId(int id) {
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this.id = id;
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}
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private Date getDate1() {
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return date1;
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}
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private void setDate1(Date date1) {
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this.date1 = date1;
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}
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private Date getDate2() {
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return date2;
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}
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private void setDate2(Date date2) {
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this.date2 = date2;
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}
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private Date getDate3() {
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return date3;
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}
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private void setDate3(Date date3) {
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this.date3 = date3;
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}
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private int getF1() {
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return f1;
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}
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private void setF1(int f1) {
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this.f1 = f1;
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}
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private int getF2() {
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return f2;
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}
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private void setF2(int f2) {
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this.f2 = f2;
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}
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}

‎codes/javalib/json/src/test/java/io/github/dunwu/javalib/json/fastjson/FastjsonTests.java‎

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package io.github.dunwu.javalib.json.fastjson;
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import com.alibaba.fastjson.JSON;
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import io.github.dunwu.javalib.json.Person;
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import org.junit.Assert;
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import org.junit.Test;
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import java.util.Date;
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/**
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* Fastjson 使用示例
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* @author Zhang Peng
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* @date 2019-03-18
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*/
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public class FastjsonTests {
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/**
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* 序列化测试
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*/
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@Test
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public void serialize() {
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Person p = new Person("Tom", 20);
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String json = JSON.toJSONString(p);
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Assert.assertNotNull(json);
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System.out.println("json = [" + json + "]");
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}
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/**
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* 反序列化测试
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*/
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@Test
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public void deserialize() {
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final String json = "{\"age\":20,\"name\":\"Tom\"}";
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Person p = JSON.parseObject(json, Person.class);
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Assert.assertNotNull(p);
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System.out.println("p = [" + p + "]");
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}
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/**
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* 序列化测试
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*/
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@Test
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public void serializeAnnotation() {
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FastjsonAnnotationBean bean = new FastjsonAnnotationBean(1, new Date(), new Date(), new Date(), 10, 20);
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String json = JSON.toJSONString(bean);
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Assert.assertNotNull(json);
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System.out.println("json = [" + json + "]");
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}
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}

‎codes/javalib/json/src/test/java/io/github/dunwu/javalib/json/jackson/JacksonAnnotationBean.java‎

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package io.github.dunwu.javalib.json.jackson;
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import com.fasterxml.jackson.annotation.JsonIgnore;
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import com.fasterxml.jackson.annotation.JsonProperty;
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import com.fasterxml.jackson.annotation.JsonPropertyOrder;
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/**
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* @author Zhang Peng
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* @date 2019-03-18
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*/
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@JsonPropertyOrder(alphabetic = true)
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public class JacksonAnnotationBean {
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private String Name;
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private int Age;
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@JsonIgnore
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private String Sex;
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public JacksonAnnotationBean() { }
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public JacksonAnnotationBean(String name, int age, String sex) {
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Name = name;
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Age = age;
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Sex = sex;
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}
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@JsonProperty("username")
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public String getName() {
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return Name;
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}
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public void setName(String name) {
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Name = name;
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}
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public int getAge() {
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return Age;
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}
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public void setAge(int age) {
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Age = age;
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}
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public String getSex() {
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return Sex;
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}
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public void setSex(String sex) {
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Sex = sex;
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}
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}

‎codes/javalib/json/src/test/java/io/github/dunwu/javalib/json/jackson/JacksonTests.java‎

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package io.github.dunwu.javalib.json.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 io.github.dunwu.javalib.json.Person;
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import org.junit.Assert;
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import org.junit.Test;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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/**
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* Jackson 使用示例
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* @author Zhang Peng
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* @date 2019-03-18
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*/
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public class JacksonTests {
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final ObjectMapper mapper = new ObjectMapper();
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/**
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* 序列化测试
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*/
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@Test
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public void serialize() {
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Person p = new Person("Tom", 20);
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String json = null;
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try {
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json = mapper.writeValueAsString(p);
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} catch (JsonProcessingException e) {
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e.printStackTrace();
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}
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Assert.assertNotNull(json);
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System.out.println("json = [" + json + "]");
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}
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/**
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* 反序列化测试
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*/
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@Test
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public void deserialize() {
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final String json = "{\"age\":20,\"name\":\"Tom\"}";
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Person p = null;
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try {
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p = mapper.readValue(json, Person.class);
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} catch (IOException e) {
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e.printStackTrace();
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}
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Assert.assertNotNull(p);
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System.out.println("p = [" + p + "]");
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}
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/**
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* 序列化测试
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*/
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@Test
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public void serialize2() {
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Person p = new Person("Tom", 20);
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Person p2 = new Person("Jack", 22);
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Person p3 = new Person("Mary", 18);
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List<Person> persons = new LinkedList<>();
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persons.add(p);
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persons.add(p2);
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persons.add(p3);
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Map<String, List> map = new HashMap<>();
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map.put("persons", persons);
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String json = null;
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try {
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json = mapper.writeValueAsString(map);
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} catch (JsonProcessingException e) {
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e.printStackTrace();
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}
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Assert.assertNotNull(json);
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System.out.println("json = [" + json + "]");
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}
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/**
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* 序列化测试
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*/
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@Test
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public void serialize3() {
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JacksonAnnotationBean jacksonAnnotationBean = new JacksonAnnotationBean("jack", 19, "男");
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String json = null;
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try {
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json = mapper.writeValueAsString(jacksonAnnotationBean);
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} catch (JsonProcessingException e) {
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e.printStackTrace();
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}
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Assert.assertNotNull(json);
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System.out.println("json = [" + json + "]");
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}
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}

‎codes/javalib/pom.xml‎

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<modules>
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<module>bean</module>
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<module>json</module>
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<module>log</module>
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<module>mvel</module>
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<module>test</module>

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