阿里的fastJSON的用法

新建两个实体User和Teacher

package org.fastjson;public class User {    private int id;    private String userName;    public User() {    }    public User(int id, String userName) {        this.id = id;        this.userName = userName;    }    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getUserName() {        return userName;    }    public void setUserName(String userName) {        this.userName = userName;    }    @Override    public String toString() {        return "User [id=" + id + ", userName=" + userName + "]";    }}

package org.fastjson;public class Teacher {    private int id;    private String classNo;    private String courseNo;    public Teacher() {        super();    }    public Teacher(int id, String classNo, String courseNo) {        this.id = id;        this.classNo = classNo;        this.courseNo = courseNo;    }    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getClassNo() {        return classNo;    }    public void setClassNo(String classNo) {        this.classNo = classNo;    }    public String getCourseNo() {        return courseNo;    }    public void setCourseNo(String courseNo) {        this.courseNo = courseNo;    }    @Override    public String toString() {        return "Teacher [id=" + id + ", classNo=" + classNo + ", courseNo=" + courseNo + "]";    }}

package org.fastjson;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.SQLException;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONArray;import com.alibaba.fastjson.JSONObject;import com.alibaba.fastjson.TypeReference;public class FastjsonClass {    public static void main(String[] args) {        System.out.println(mapToJson());    }    public void parseJson(String jsonStr){        User user = new User(11,"京津冀");        Teacher teacher = new Teacher(1,"A1000","CC2000");        Teacher teacher1 = new Teacher(2,"A1001","CC2001");        List<Teacher> teacherList = new ArrayList<Teacher>();        teacherList.add(teacher);        teacherList.add(teacher1);        Temp temp = new Temp(user,teacherList);        String tempJson = JSON.toJSONString(temp);          System.out.println(tempJson);        JSONObject jsonObj = JSON.parseObject(tempJson);          JSONArray result = jsonObj.getJSONArray("teacherList");          List<Teacher> th = JSON.parseArray(result.toJSONString(),Teacher.class);          System.out.println(th.toString());        JSONObject userObj = jsonObj.getJSONObject("user");        User user1 = JSON.parseObject(userObj.toJSONString(), new TypeReference<User>() {});        User user2 = JSON.parseObject(userObj.toJSONString(), User.class);        System.out.println(user.toString());        try {            DButils.getConnection();            // System.out.println(getCount("SELECT count(table_name) FROM information_schema.TABLES WHERE table_name='book' "));            DButils.insertEntity(User.class, user2);        } catch (SQLException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (ClassNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }    public static String mapToJson(){        Map<String, Object> map = new HashMap<String, Object>();        User user = new User(11,"京津冀");        map.put("user", user);        Teacher teacher = new Teacher(1,"A1000","CC2000");        Teacher teacher1 = new Teacher(2,"A1001","CC2001");        List<Teacher> teacherList = new ArrayList<Teacher>();        teacherList.add(teacher);        teacherList.add(teacher1);        map.put("teacherList", teacherList);        return JSON.toJSONString(map);     }}