Question

我确信之前已经问过这个问题，但我确实需要帮助，因为我是java编程的书呆子（我真的非常初学者）。我使用Netbeans作为IDE。有关JSON文件的问题，我想解析它但不知道如何在java中执行它。

这是我的JSON文件：

    [
       {
          "rows":[
             {
                "positionId":1,
                "userName":"Abay Nurpeissov/ Абай Нурпеисов",
                "vacation":"",
                "position":"Student",
                "officePhone":"",
                "mobilePhone":"",
                "email":"",
                "userid":"201641686",
                "groupEmail":"",
                "departmentPathEN":""
             },
             {
                "positionId":1,
                "userName":"Abilmansur Yeshmuratov/ Абильмансур Ешмуратов",
                "vacation":"",
                "position":"Student",
                "officePhone":"",
                "mobilePhone":"",
                "email":"",
                "userid":"201551882",
                "groupEmail":"",
                "departmentPathEN":""
             }
                ]
      }
   ]

这是我的代码：

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package kyzdarkz;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import org.apache.poi.hssf.usermodel.HSSFSheet;
/**
 *
 * @author anuar
 */
public class Kyzdarkz {

    //private ArrayList<Student> students = new ArrayList();

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {

        try(BufferedReader br = new BufferedReader(new FileReader("json.txt"))) {
            StringBuilder sb = new StringBuilder();
            String line = br.readLine();

        while (line != null) {
            sb.append(line);
            sb.append(System.lineSeparator());
            line = br.readLine();
        }
        String everything = sb.toString();
    }  

    }
}

我想将“userName”和“userid”保存为vars数组。我怎么能这样做？

Answer 1

使用一些Java lib :(例如：Gson，jackson）并将其导入您的项目中。

创建一个与输入json对应的类。例如：

公共阶层Emp {

private String positionId;
private String username;
private String postion;

//and so on ...

public String getPositionId() {
    return positionId;
}
public void setPositionId(String positionId) {
    this.positionId = positionId;
}
public String getUsername() {
    return username;
}
public void setUsername(String username) {
    this.username = username;
}
public String getPostion() {
    return postion;
}
public void setPostion(String postion) {
    this.postion = postion;
}

//and so on ....

}

在你的方法中使用它。

Gson gson = new Gson（）;
Emp [] person = gson.fromJson（input，Emp [] .class）;

查看此部门内部教程：http://www.java2blog.com/2013/11/gson-example-read-and-write-json.html

如何在java中读取json .txt文件

1 个答案: