Mr. Sun's version of JDBC (21:34:25, June 12, 2022)

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  Database auto shutdown , It's much more convenient .

package com.item.dao;import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;public class JDBCUtil implements AutoCloseable {	private static String driver="com.mysql.jdbc.Driver";	private static String url="jdbc:mysql://127.0.0.1:3306/mytest?characterEncoding=utf-8";	//  Connection object 	private static Connection conn;	//  Result set 	private static ResultSet rs;	//  Code block 	static{		try {			Class.forName(driver);			conn = DriverManager.getConnection(url, "root", "12345678");		} catch (Exception e) {			e.printStackTrace();		}	}	/**	 *  whole SQL Inquire about 	 * @param sql	 * @return	 * @throws SQLException	 */	public static ResultSet query(String sql) throws SQLException {		return conn.createStatement().executeQuery(sql);	}	/**	 * @param sql	 * @return	 * @throws SQLException	 */	public static int update(String sql) throws SQLException {		return conn.prepareStatement(sql).executeUpdate();	}	@Override	public void close() throws Exception {		if (null != rs) {			rs.close();		}		if (null != conn) {			conn.close();		}	}}

The test data ：

	public static void main(String[] args) throws SQLException {		ResultSet re = query("select * from users");		while (re.next()) {			System.out.println(re.getObject(1));			System.out.println(re.getObject(2));			System.out.println(re.getObject(3));			System.out.println(re.getObject(4));			System.out.println(re.getObject(5));		}	}

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edit

swing

	/**	 *  Convert to Vectors aggregate 	 * 	 * @param userList	 * @return	 */	public static Vector<Vector<String>> listToVectors(List<UserVo> userList) {		Vector<Vector<String>> datas = new Vector<Vector<String>>();		for (int i = 0; i < userList.size(); i++) {			UserVo u = userList.get(i);			if (null == u)				continue;			Vector<String> item = new Vector<String>();			item.add(u.getId().toString());			item.add(u.getAccount());			item.add(u.getSex() == 1 ? " male " : " Woman ");			item.add(u.getEducation());			item.add(u.getPhone());			item.add(u.getEmail());						item.add(u.getRegisterDate());			if (null == u.getUpdateDate()) {				item.add("");			}else {				item.add(u.getUpdateDate());			}			datas.add(item);		}		return datas;	}

Three line implementation JTable Data update .

datas.clear();datas.addAll(ListDbUtils.listToVectors(userService.list()));jTable.updateUI();JTable jTable = new JTable(datas, heads);

This is more convenient and faster , however javaEE Has not been tested yet . I'll get a complete one later .

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