java Swing 界面化查询数据库表

Z时代
2024-01-10
分类：综合

java

两天从0基础写的。没有按钮对话框功能，只是简单的实现。

当然代码上有很多需要优化的，基本需要重写哈哈哈。但是我怕以后有需要所以还是存一下好了。《把RS结果集，放vector里面，用vector构造JTable》

 1 package meterSqllitedataFinal;
 2 
 3 import java.awt.Dimension;
 4 import java.util.Vector;
 5 import javax.swing.JButton;
 6 import javax.swing.JFrame;
 7 import javax.swing.JLabel;
 8 import javax.swing.JScrollPane;
 9 import javax.swing.JTable;
10 
11 public class mainn extends JFrame {
12     //private Vector rowData, columnName;
13     private JTable jt = null;
14     private JScrollPane jsp = null;
15     private JButton jb = null;
16 
17     public static void main(String[] args) {
18         // 显示应用 GUI
19         mainn miann1 = new mainn();
20     }
21     
22     public mainn()
23     {
24         sqlitedata a = new sqlitedata();
25          //初始化JTable  
26         a.mainjj();
27                  
28         jt = new JTable(a.rowData, a.columnName);  
29           
30         jsp = new JScrollPane(jt);  
31         
32         this.add(jsp);  
33         this.setTitle("by:Zing庄     SqlliteConnect");  
34         this.setSize(460, 200);  //这是大小
35         this.setLocation(300, 200);  //这是位置
36         this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
37         this.setResizable(true);  //尺寸是否可变
38         this.setVisible(true);  //显示与隐藏
39     }
40     
41 }

 1 package meterSqllitedataFinal;
 2 
 3 import java.sql.Connection;
 4 import java.sql.DriverManager;
 5 import java.sql.ResultSet;
 6 import java.sql.ResultSetMetaData;
 7 import java.sql.Statement;
 8 import java.util.Vector;
 9 
10 import javax.swing.JScrollPane;
11 import javax.swing.JTable;
12 
13 import org.omg.CORBA.PRIVATE_MEMBER;
14 
15 public class sqlitedata {
16     public  Vector rowData, columnName;  
17     
18     public void mainjj() {
19         Connection c = null;
20         Statement stmt = null;
21 
22         rowData = new Vector();
23         try {
24             Class.forName("org.sqlite.JDBC");
25             c = DriverManager.getConnection("jdbc:sqlite:d:\\web\\data.data\\");//tim.data  
26             c.setAutoCommit(false);
27             System.out.println("Opened database successfully");
28 
29             stmt = c.createStatement();
30             ResultSet rs = stmt.executeQuery("SELECT * FROM Meter;");//COMPANY
31             ResultSetMetaData data = rs.getMetaData();
32             
33             columnName = new Vector();  
34             System.out.println("dd");
35             
36             
37             
38             for (int i = 1; i <= data.getColumnCount(); i++) {
39                 columnName.add(data.getColumnName(i));//这里是列名
40             }
41             
42             while (rs.next()) {
43 
44                     Vector line1 = new Vector();
45                     for (int k = 1; k <= data.getColumnCount(); k++) {
46 
47                         line1.add(rs.getString(data.getColumnName(k)));//这里是添加行数据
48                     }
49                     rowData.add(line1);
50                 }
51                     
52             rs.close();
53             stmt.close();
54             c.close();
55         } catch (Exception e) {
56             System.err.println(e.getClass().getName() + ": " + e.getMessage());
57             System.exit(0);
58         }
59         System.out.println("Operation done successfully");
60         
61     }
62 
63 }