Java与JSON之间的相互转换-3

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添加 jar 包支持

commons-beanutils-1.8.0.jarcommons-collections-3.1.jarcommons-lang-2.5.jarcommons-logging-1.1.1.jarezmorph-1.0.6.jarjson-lib-2.4-jdk15.jar

编写工具类

import java.util.List;import net.sf.json.JSONArray;import net.sf.json.JSONObject;public class JsonUtils {    public static <T> T toObject(String data, Class<T> clazz) {        return (T) JSONObject.toBean(JSONObject.fromObject(data), clazz);    }    public static String toJson(Object object) {        return JSONObject.fromObject(object).toString();    }    public static String toJsonByList(Object object) {        return JSONArray.fromObject(object).toString();    }    public static <T> List<T> toList(String data, Class<T> clazz) {        return (List<T>) JSONArray.toCollection(JSONArray.fromObject(data), clazz);    }}

测试代码

import java.util.ArrayList;import java.util.List;import model.Person;import org.junit.Test;import util.JsonUtils;public class JsonTest {    /**     * Object ---> JSON     */    @Test    public void testObjectToJson() {        Person p = new Person();        p.setName("张三");        p.setAge("18");        p.setAddress("郑州");        String result = JsonUtils.toJson(p);        System.out.println(result);    }    /**     * JSON ---> Object     */    @Test    public void testJsonToObject() {        String data = "{\"address\":\"郑州\",\"age\":\"18\",\"name\":\"张三\"}";        Person p = JsonUtils.toObject(data, Person.class);        System.out.println(p);    }    /**     * List ---> JSON     */    @Test    public void testListToJson() {        Person p1 = new Person();        p1.setName("张三");        p1.setAge("18");        p1.setAddress("郑州");        Person p2 = new Person();        p2.setName("李四");        p2.setAge("20");        p2.setAddress("北京");        List<Person> list = new ArrayList<Person>();        list.add(p1);        list.add(p2);        String result = JsonUtils.toJsonByList(list);        System.out.println(result);    }    /**     * JSON ---> List     */    @Test    public void testJsonToList() {        String data = "[{\"address\":\"郑州\",\"age\":\"18\",\"name\":\"张三\"},{\"address\":\"北京\",\"age\":\"20\",\"name\":\"李四\"}]";        List<Person> list = JsonUtils.toList(data, Person.class);        for (Person person : list) {            System.out.println(person);        }    }}

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