JDBC package and JAVA standard data processing, access to MS SQL SERVER, at the end of the article there are JAVA source code download and MS SQL SERVER example database to download the recoverable file
Environment: jdk-14.0.1_windows-x64 MS SQLSERVER2014
//Package
//JDBC package class//
package jdbcutils;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
//import java.lang.reflect.Field;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
//import java.sql.ResultSetMetaData;
import java.sql.SQLException;
//import java.util.ArrayList;
//import java.util.HashMap;
import java.util.List;
//import java.util.Map;
// import java.utiljdbcutils .Map;
import java.util.Properties;
public class JdbcUtils
{ // Indicates that the user name of the database is defined private final String USERNAME = "sa"; // The password of the database is defined private final String PASSWORD = "3201319"; // The driver information of the database is defined private final String DRIVER = "com .microsoft.sqlserver.jdbc.SQLServerDriver"; // Define the address to access the database private final String URL = "jdbc:sqlserver://localhost:1433;DatabaseName=bhjs"; // Define the link to the database private Connection connection; // Define the execution object of the SQL statement private PreparedStatement pstmt; // Define the result set returned by the query private ResultSet resultSet;
public void JdbcUtils()
{
try
{
Class.forName(DRIVER);
System.out.println("注册驱动成功!!");
}
catch (Exception e)
{
// TODO: handle exception
}
}
// Define the connection to the database
public Connection getConnection()
{ try { connection = DriverManager.getConnection(URL, USERNAME, PASSWORD); System.out.println("Database connection is successful"); } catch (Exception e) { // TODO: handle exception } return connection; } public ResultSet findMoreResult(String sql, List params) throws SQLException //The query returns multiple rows of values { int index = 1; ResultSet resultSet;
pstmt = connection.prepareStatement(sql);
if (params != null && !params.isEmpty())
{
for (int i = 0; i < params.size(); i++)
{
pstmt.setObject(index++, params.get(i));
}
}
resultSet = pstmt.executeQuery();
return resultSet;
}
public boolean updateByPreparedStatement(String sql, List params) throws SQLException //Update
{ boolean flag = false; int result = -1;// Indicates the number of rows in the database affected when the user performs addition, deletion and modification pstmt = connection.prepareStatement (sql); int index = 1; // Fill the placeholders in the SQL statement if (params != null && !params.isEmpty()) { for (int i = 0; i <params.size(); i++ ) { pstmt.setObject(index++, params.get(i)); } } result = pstmt.executeUpdate(); flag = result> 0? true: false;
return flag;
}
public void releaseConn() //释放连接
{
if (resultSet != null)
{
try
{
resultSet.close();
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (pstmt != null)
{
try
{
pstmt.close();
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (connection != null)
{
try
{
connection.close();
}
catch (SQLException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
//Test application/
package form1;
import java.awt.Component;
import java.awt.EventQueue;
import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import java.util.Vector;
// import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.table.DefaultTableModel;
import javax.swing.JScrollBar;
import java.awt.ScrollPane;
import javax.swing.JTextField;
//import javax.swing.table.DefaultTableModel;
// import javax.swing.ListSelectionModel;
import jdbcutils.JdbcUtils;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.Panel;
import java.awt.Color;
public class form2 {
private JFrame frmJdbc;
//private static final String JdbcUtils1 = null;
private JTable table;
JScrollPane jScrollPane = null;
private JTextField textField;
private JTextField textField_1;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
form2 window = new form2();
window.frmJdbc.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public form2() {
initialize();
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frmJdbc = new JFrame();
frmJdbc.setTitle("JDBC\u5C01\u88C5\u548C\u6570\u636E\u5904\u7406");
frmJdbc.setBounds(400, 100, 636, 561);
frmJdbc.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frmJdbc.getContentPane().setLayout(null);
///
Connection con = null;
PreparedStatement statement = null;
ResultSet res = null;
List parm1=null;
try {
JdbcUtils JdbcUtils1 =new JdbcUtils();
JdbcUtils1.JdbcUtils();
con=JdbcUtils1.getConnection();
String sql = "select * from info_jqmc ";//查询test表
res=JdbcUtils1.findMoreResult(sql,parm1); //调用jdbc封装类中 查询函数
Vector line1;
Vector rows,columnNames;
rows = new Vector();
columnNames = new Vector();
columnNames.add("jqmc");
columnNames.add("jqip");
while(res.next()){
line1 = new Vector();
line1.add(res.getString("jqmc"));
line1.add(res.getString("jqip"));
rows.add(line1);
}
//定义JTable的对象
table = new JTable(rows, columnNames);
table.setBounds(41, 37, 467, 306);
table.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
int selectRows=table.getSelectedRows().length;// 取得用户所选行的行数
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();
int selectedRowIndex = table.getSelectedRow(); // 取得用户所选单行
textField.setText((String)table.getValueAt(selectedRowIndex,0));
textField_1.setText((String)table.getValueAt(selectedRowIndex,1));
// 进行相关处理
}
});
jScrollPane = new JScrollPane(table);
jScrollPane.setToolTipText("");
jScrollPane.setBounds(43, 23, 534, 308);
frmJdbc.getContentPane().add(jScrollPane);
} catch (Exception e1) {
// TODO: handle exception
e1.printStackTrace();
}finally{
try {
if(res != null) res.close();
if(statement != null) statement.close();
if(con != null) con.close();
} catch (Exception e2) {
// TODO: handle exception
e2.printStackTrace();
}
}
/
JButton btnNewButton = new JButton("\u67E5\u8BE2");
btnNewButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
btnNewButton.setBounds(25, 430, 93, 23);
frmJdbc.getContentPane().add(btnNewButton);
JButton btnNewButton_1 = new JButton("\u9000\u51FA");
btnNewButton_1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
//lblNewLabel.setText("加载驱动成功！");
}
});
btnNewButton_1.setBounds(497, 430, 93, 23);
frmJdbc.getContentPane().add(btnNewButton_1);
JButton btnNewButton_2 = new JButton("\u5220\u9664");
btnNewButton_2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{ //删除
Connection con = null;
//List param2=null;
boolean fl;
int selectRows=table.getSelectedRows().length;// Get the number of rows selected by the user
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();
if(selectRows==1){ int selectedRowIndex = table.getSelectedRow(); // Get a single row JdbcUtils selected by the user JdbcUtils2 =new JdbcUtils(); JdbcUtils2.JdbcUtils(); con=JdbcUtils2.getConnection(); // Perform correlation Processing String sql1 = "DELETE from info_jqmc WHERE jqmc=?"; //Update the test table List param2 = new ArrayList(); param2.add(textField.getText()); try { fl=JdbcUtils2.updateByPreparedStatement(sql1, param2) ; } catch (Exception e1)
{ e1.printStackTrace(); } } else { JOptionPane.showMessageDialog(null,"Please select the row first, and then click to delete"); }
}
});
btnNewButton_2.setBounds(261, 430, 93, 23);
frmJdbc.getContentPane().add(btnNewButton_2);
JButton btnNewButton_3 = new JButton("\u4FDD\u5B58");
btnNewButton_3.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Connection con = null;
//List param2=null;
boolean fl;
int selectRows=table.getSelectedRows().length;// 取得用户所选行的行数
DefaultTableModel tableModel = (DefaultTableModel) table.getModel();
if(selectRows==1){ int selectedRowIndex = table.getSelectedRow(); // Get a single row JdbcUtils selected by the user JdbcUtils2 =new JdbcUtils(); JdbcUtils2.JdbcUtils(); con=JdbcUtils2.getConnection(); // Perform correlation Processing String sql1 = "UPDATE info_jqmc SET jqmc=?,jqip=? WHERE jqmc=?"; //Update the test table List param2 = new ArrayList(); param2.add(textField.getText()); param2.add(textField_1 .getText()); param2.add(textField.getText()); try {
fl=JdbcUtils2.updateByPreparedStatement(sql1, param2);
}
catch (Exception e1)
{
e1.printStackTrace();
}
}
else
{
JOptionPane.showMessageDialog(null,"请先选中行，再点击保存");
}
}
});
btnNewButton_3.setBounds(379, 430, 93, 23);
frmJdbc.getContentPane().add(btnNewButton_3);
JLabel lblNewLabel_1 = new JLabel("\u673A\u5668\u540D\u79F0\uFF1A");
lblNewLabel_1.setBounds(54, 385, 60, 15);
frmJdbc.getContentPane().add(lblNewLabel_1);
textField = new JTextField();
textField.setBounds(132, 382, 96, 21);
frmJdbc.getContentPane().add(textField);
textField.setColumns(10);
JLabel lblNewLabel_2 = new JLabel("\u673A\u5668\u72B6\u6001");
lblNewLabel_2.setBounds(238, 385, 55, 15);
frmJdbc.getContentPane().add(lblNewLabel_2);
textField_1 = new JTextField();
textField_1.setBounds(303, 382, 96, 21);
frmJdbc.getContentPane().add(textField_1);
textField_1.setColumns(10);
JLabel lblNewLabel = new JLabel("\u7F16\u8F91\uFF1A");
lblNewLabel.setBounds(54, 360, 54, 15);
frmJdbc.getContentPane().add(lblNewLabel);
JButton btnNewButton_4 = new JButton("\u65B0\u589E");
btnNewButton_4.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
}
});
btnNewButton_4.setBounds(143, 430, 93, 23);
frmJdbc.getContentPane().add(btnNewButton_4);
//table_1 = new JTable();
//table_1.setBounds(63, 87, 300, 141);
//frame.getContentPane().add(table_1);
}
}
Source code download: link: https://pan.baidu.com/s/1SAhG8whvK99_64jdlIA5zA Extraction code: g83s
Example: MS SQL SERVER database recoverable file download:
Link: https://pan.baidu.com/s/11NdjOptjs_EZRfcr7UHk5A Extraction code: s88h
JDBC下载：Microsoft JDBC Driver 7.0 for SQL Server
Link: https://pan.baidu.com/s/1PonMpXUKEQyQu3Nf-mtoTw Extraction code: w5ys
jdk-14.0.1_windows-x64_bin
Link: https://pan.baidu.com/s/1_Csf5zKneP0i-yYAr3TcIg Extraction code: 2f62
eclipse-java-2020-03-R-win32-x86_64
Link: https://pan.baidu.com/s/1BDKwzni6-S05hLS9T_5DLg Extraction code: 3qs2
windowbuilder java interface design package
Link: https://pan.baidu.com/s/1gfsv4ozdQ2Nz4FRKx_xwEg Extraction code: er5n