JAVA程序中的JSON数据处理

深藏阁楼爱情的钟 2022-08-07 17:30 190阅读 0赞

#  #

**使用到的jar包**：commons-collections-3.2.jar，commons-lang-2.3.jar，commons-beanutils-1.7.0.jar，ezmorph-1.0.4.jar ，json-lib-2.2.3-jdk15.jar([下载地址][Link 1])

**下面是具体代码处理**（所有测试都写在了一个类里面，测试的时候需要将其他函数注释掉。注意在使用JSONArray对象时，上面两个import的引包必须注释掉一个，具体注释哪一个根据自己测试的程序确定。）

import java.util.HashMap;  
import java.util.Map;

import org.json.JSONArray;  
import org.json.JSONException;

import net.sf.json.JSONArray;  
import net.sf.json.JSONObject;

import com.xishan.form.UserForm;

public class JsonTest \{

//对单个json对象进行处理
    public static void main(String[] args) {
         UserForm form = new UserForm();
         form.setPageNo("2");
         form.setUid("1");
         form.setUserName("anran");
         form.setUserPassword("123456");
         form.setPageSize("2");
         //将类对象转换成json对象
         JSONObject json =JSONObject.fromObject(form);
         //将json对象转换成string对象
         String result = json.toString();
         System.out.println("\n*********************\n");
         System.out.println(result);
         System.out.println("\n*********************\n");
    
         //将string对象转换成json对象
         JSONObject json1 = new JSONObject().fromObject(result);
         System.out.println("\n*********************\n");
         System.out.println("\n"+json1.getString("uid"));
         System.out.println(json1.getString("userName"));
         System.out.println(json1.getString("userPassword"));
         System.out.println(json1.getString("pageNo"));
         System.out.println(json1.getString("pageSize"));
         System.out.println("\n*********************\n");
    
    }
    
    
    
    
    //对多个json对象进行处理,jsonArry使用的是net.sf.json.JSONObject;
    public static void main(String[] args) {
        UserForm form1 = new UserForm();
        UserForm form2 = new UserForm();
        form1.setUid("1");
        form1.setUserName("xishan");
        form1.setUserPassword("123456");
        form1.setPageNo("2");
        form1.setPageSize("2");
        form2.setUid("2");
        form2.setUserName("anran");
        form2.setUserPassword("98765");
        form2.setPageNo("4");
        form2.setPageSize("4");
        JSONArray array = new JSONArray(); //net.sf.json.JSONObject;
        array.add(form2);
        array.add(form1);
        String result = array.toString();
        System.out.println("\n***************************\n");
        System.out.println(result);
        System.out.println("\n***************************\n");
        String[] result1 = new String[array.size()];
        for(int i = 0; i<array.size(); i++){
            result1[i] = array.getString(i);
        }
        for(int i =0; i<array.size(); i++){
            String jsonStr = result1[i];
            System.out.println(jsonStr);
            JSONObject json1 = new JSONObject().fromObject(jsonStr);
             System.out.println("\n*********************\n");
             System.out.println("\n"+json1.getString("uid"));
             System.out.println(json1.getString("userName"));
             System.out.println(json1.getString("userPassword"));
             System.out.println(json1.getString("pageNo"));
             System.out.println(json1.getString("pageSize"));
             System.out.println("\n*********************\n");
        }   
    }
    
    //对多个json对象进行处理,jsonArry使用的是 org.json.JSONArray;
    public static void main(String[] args) throws JSONException {
        UserForm form1 = new UserForm();
        UserForm form2 = new UserForm();
        form1.setUid("1");
        form1.setUserName("xishan");
        form1.setUserPassword("123456");
        form1.setPageNo("2");
        form1.setPageSize("2");
        form2.setUid("2");
        form2.setUserName("anran");
        form2.setUserPassword("98765");
        form2.setPageNo("4");
        form2.setPageSize("4");
        JSONArray array = new JSONArray(); // org.json.JSONArray;
        array.put(form1);
        array.put(form2);
        String result = array.toString();
        System.out.println("\n***************************\n");
        System.out.println(result);
        System.out.println("\n***************************\n");
        UserForm[] result1 = new UserForm[array.length()];
        for(int i = 0; i<array.length(); i++){
            result1[i] =  (UserForm) array.get(i);
            System.out.println("\n***************************\n");
            System.out.println(result1[i]);
            System.out.println("\n***************************\n");
        }
        for(int i =0; i<array.length(); i++){
             System.out.println("\n*********************\n");
             System.out.println("\n"+result1[i].getUid());
             System.out.println(result1[i].getUserName());
             System.out.println(result1[i].getUserPassword());
             System.out.println(result1[i].getPageNo());
             System.out.println(result1[i].getPageSize());
             System.out.println("\n*********************\n");
        }
    }
    
    
    
    //利用hashmap进行json数据转换
    public static void main(String[] args) {
        Map map = new HashMap();
        map.put("uid", "1");
        map.put("userName", "xishan");
        map.put("userPassword", "123456");
        map.put("pageNo", "2");
        map.put("pageSize", "2");
        JSONObject json =JSONObject.fromObject(map);
        //将json对象转换成string对象
        String result = json.toString();
        System.out.println("\n*********************\n");
        System.out.println(result);
        System.out.println("\n*********************\n");
    }

下面是UserForm的代码：

public class UserForm \{

private String uid;
    private String userName;
    private String userPassword;
    private String pageNo;
    private String pageSize;
    
    
    public String getPageNo() {
        return pageNo;
    }
    public void setPageNo(String pageNo) {
        this.pageNo = pageNo;
    }
    public String getPageSize() {
        return pageSize;
    }
    public void setPageSize(String pageSize) {
        this.pageSize = pageSize;
    }
    public String getUid() {
        return uid;
    }
    public void setUid(String uid) {
        this.uid = uid;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getUserPassword() {
        return userPassword;
    }
    public void setUserPassword(String userPassword) {
        this.userPassword = userPassword;
    }

[Link 1]: http://www.veryhuo.com/down/html/64715.html