数据库表Dao层SQL语句拼接生成工具

最近在用数据库管理三层写一个项目，没有用框架，在建dao层的时候遇到了一个令人十分dan疼的事情，那就是像写插入和更新这种函数的时候SQL语句的拼接简直是要了老命呀，急着赶进度，谁有耐心去写那玩意！就是这：

于是就想要不要写一个小工具选了表就能自动生成这么一块，一拷贝一粘贴多方便，所以这么个小东西就诞生了，随便连个数据库选个表感受一下

把源码放在底下，想用的朋友可拿去玩玩~

package sqlsethelp.itbobby;

import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

/**
 * 
 * @author itBobby
 * 
 */
@SuppressWarnings("serial")
public class Sql_set extends JFrame implements ActionListener {
	JTextField tab0 = new JTextField("");
	JTextField obj0 = new JTextField("");
	static JTextField ip0 = new JTextField("127.0.0.1");
	static JTextField port0 = new JTextField("3306");
	static JTextField dbname0 = new JTextField("");
	static JTextField username0 = new JTextField("");
	static JTextField userpass0 = new JTextField("");

	JLabel tab1 = new JLabel("表        名：");
	JLabel obj1 = new JLabel("对  象  名：");
	JLabel ip1 = new JLabel("本  地   ip：");
	JLabel port1 = new JLabel("端  口  号：");
	JLabel dbname1 = new JLabel("数据库名：");
	JLabel username1 = new JLabel("用  户  名：");
	JLabel userpass1 = new JLabel("密        码：");
	JLabel status = new JLabel("提示：数据库连接已更改…如需更换请重启程序！");

	JButton bt1 = new JButton("Insert");
	JButton bt2 = new JButton("Update");
	JButton bt3 = new JButton("Reset");

	JTextArea sql = new JTextArea();

	static {
		try {
			Class.forName("com.mysql.jdbc.Driver");
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public static class sqlHelper {

		public static String dbname = dbname0.getText();
		public static String ip = ip0.getText();
		public static String port = port0.getText();
		public static String username = username0.getText();
		public static String userpass = userpass0.getText();

		public static Connection getConnection() throws SQLException {
			return DriverManager.getConnection("jdbc:mysql://" + ip + ":"
					+ port + "/" + dbname, username, userpass);
		}

		private static Statement getStatement() throws Exception {
			return getConnection().createStatement();
		}

		public static ResultSet executeQuery(String sql) {
			Statement st = null;
			try {
				st = getStatement();
				return st.executeQuery(sql);
			} catch (Exception e) {
			}

			return null;
		}

	}

	public Sql_set() {
		setTitle("Tool By itBobby");
		setSize(340, 480);
		setDefaultCloseOperation(3);
		setLocationRelativeTo(null);
		setLayout(null);
		setResizable(false);
		tab0.setBounds(110, 200, 200, 25);
		obj0.setBounds(110, 230, 200, 25);
		ip0.setBounds(110, 20, 200, 25);
		port0.setBounds(110, 50, 200, 25);
		dbname0.setBounds(110, 80, 200, 25);
		username0.setBounds(110, 110, 200, 25);
		userpass0.setBounds(110, 140, 200, 25);
		status.setBounds(25, 170, 300, 25);
		status.setForeground(Color.orange);

		tab1.setBounds(25, 200, 70, 25);
		obj1.setBounds(25, 230, 70, 25);
		ip1.setBounds(25, 20, 70, 25);
		port1.setBounds(25, 50, 70, 25);
		dbname1.setBounds(25, 80, 70, 25);
		username1.setBounds(25, 110, 70, 25);
		userpass1.setBounds(25, 140, 70, 25);

		bt1.setBounds(25, 270, 80, 25);
		bt2.setBounds(130, 270, 80, 25);
		bt3.setBounds(230, 270, 80, 25);
		JScrollPane s = new JScrollPane(sql);
		s.setBounds(25, 310, 285, 120);

		add(tab0);
		add(obj0);
		add(ip0);
		add(port0);
		add(dbname0);
		add(username0);
		add(userpass0);
		add(tab1);
		add(obj1);
		add(ip1);
		add(port1);
		add(dbname1);
		add(username1);
		add(userpass1);

		add(bt1);
		add(bt2);
		add(bt3);
		add(s);
		bt1.addActionListener(this);
		bt2.addActionListener(this);
		bt3.addActionListener(this);
		setVisible(true);
	}

	public void Reset() {
		tab0.setText("");
		obj0.setText("");
	}

	public static void main(String[] args) {
		new Sql_set();
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		if (e.getSource().equals(bt1)) {
			add(status);
			repaint();

			try {
				ResultSet rs = getrs();

				if (rs == null) {
					JOptionPane.showMessageDialog(this, "数据库信息不完整或错误！");
					System.out.println("select * from " + tab0.getText()
							+ " limit 1");
					return;
				}

				ResultSetMetaData m = rs.getMetaData();

				StringBuilder str = new StringBuilder("\"insert into "
						+ tab0.getText() + " (");
				for (int i = 1; i <= m.getColumnCount(); i++) {
					if (m.getColumnName(i).equals("id"))
						continue;
					str.append(m.getColumnName(i));
					if (i < m.getColumnCount())
						str.append(",");
				}
				str.append(")\"\n + \"values(\"+\n");
				for (int i = 1; i <= m.getColumnCount(); i++) {
					if (m.getColumnName(i).equals("id"))
						continue;
					String s = m.getColumnName(i);
					String col = obj0.getText() + ".get"
							+ ("" + s.charAt(0)).toUpperCase() + s.substring(1)
							+ "()";
					String c = "";
					if (i < m.getColumnCount())
						c = ",";
					if (m.getColumnType(i) == Types.INTEGER
							|| m.getColumnType(i) == Types.DOUBLE) {
						str.append(col + "+\"" + c + "\"+\n");
					} else {
						str.append("\"'\"+" + col + "+\"'" + c + "\"+\n");
					}
				}
				str.append("\")\"");
				sql.setText(str.toString());
			} catch (Exception e1) {

			}

		} else if (e.getSource().equals(bt2)) {
			add(status);
			repaint();
			try {
				ResultSet rs = getrs();
				System.out.println(111);
				if (rs == null) {
					JOptionPane.showMessageDialog(this, "数据库信息不完整或错误！");
					System.out.println("select * from " + tab0.getText()
							+ " limit 1");
					return;
				}

				ResultSetMetaData m = rs.getMetaData();

				StringBuilder str = new StringBuilder("\"update "
						+ tab0.getText() + " set \"+\n");
				for (int i = 1; i <= m.getColumnCount(); i++) {
					if (m.getColumnName(i).equals("id"))
						continue;

					str.append("\"" + m.getColumnName(i) + "=\"+");
					String s = m.getColumnName(i);
					String col = obj0.getText() + ".get"
							+ ("" + s.charAt(0)).toUpperCase() + s.substring(1)
							+ "()";
					String c = "";
					if (i < m.getColumnCount())
						c = ",";
					if (m.getColumnType(i) == Types.INTEGER
							|| m.getColumnType(i) == Types.DOUBLE) {
						str.append(col + "+\"" + c + "\"+\n");
					} else {
						str.append("\"'\"+" + col + "+\"'" + c + "\"+\n");
					}
				}
				str.append("\" where id=\" + " + obj0.getText() + ".getId());");

				sql.setText(str.toString());
			} catch (Exception e2) {

			}

		} else if (e.getSource().equals(bt3)) {

			Reset();

		}

	}

	public ResultSet getrs() {

		return sqlHelper.executeQuery("select * from " + tab0.getText()
				+ " limit 1");

	}

}

 

#使用过程中如有问题请与本人联系，转载请注明出处#