Mysql自动生成javabean

直接上代码：

数据库链接工具类：

import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.SQLException;import java.sql.Statement;//本类专门用来连接数据库,可以作为固定的工具类使用(记下来即可)public class DBManager {// 定义一个静态的连接对象用来连接数据库// private static Connection conn = null;// 定一个静态的语句对象,用来执行sql语句// private static Statement stmt = null;// 定义一个静态的结果集对象用来存放执行sql语句后查询得到的结果// private static ResultSet rs = null;/** * 连接数据库的方法 *  * @return conn 返回一个连接对象 */public static Connection mssql(String url, String user, String pass) {Connection conn = null;try {// 1、加载连接驱动// "jdbc:odbc:bookdemo"Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");// 2、连接到数据库（获得连接对象）// 通过连接管理器(DriverManager)类的一个方法来获得连接对象，里面的参数表示我们连接到数据源bookdemoconn = DriverManager.getConnection(url, user, pass);} catch (ClassNotFoundException e) {// 以堆栈的方式将错误信息打印出来e.printStackTrace();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}return conn; // 将连接对象返回}/** * 连接数据库的方法 *  * @return conn 返回一个连接对象 * @throws ClassNotFoundException * @throws SQLException */public static Connection mysql(String url, String user, String pass)throws ClassNotFoundException, SQLException {Connection conn = null;// 1、加载连接驱动// "jdbc:odbc:bookdemo"Class.forName("com.mysql.jdbc.Driver");// 2、连接到数据库（获得连接对象）// 通过连接管理器(DriverManager)类的一个方法来获得连接对象，里面的参数表示我们连接到数据源bookdemoconn = DriverManager.getConnection(url, user, pass);return conn; // 将连接对象返回}/** * 动漫网的mysql数据库连接 * @throws SQLException  * @throws ClassNotFoundException  */public static Connection mysql(String host, String database, String user,String pass) throws ClassNotFoundException, SQLException {String url = "jdbc:mysql://" + host + "/" + database+ "?useUnicode=true&characterEncoding=UTF-8";return mysql(url, user, pass);}/** * 本函数用来执行用户传入的sql语句(仅限于select语句) *  * @param sql *            传入的sql语句，等待执行 * @return 返回执行sql语句后的结果集对象 */public static ResultSet query(Connection conn, String sql) {ResultSet rs = null;try {// 3、通过连接对象创建一个语句对象stmt，用来执行sql语句Statement stmt = conn.createStatement();// 4、执行sql语句，得到一个rs（结果集对象）rs = stmt.executeQuery(sql);} catch (Exception e) { // 错误处理，暂时不用理会e.printStackTrace();}return rs; // 将查询得到的结果集对象返回}/** * 本方法用来执行更新语句，并返回影响了多少行（insert,update,delete） *  * @param sql *            传入的sql语句，等待执行 * @return 返回执行sql语句后的结果集对象 */public static int update(Connection conn, String sql) {// 执行sql语句前先连接到数据库Statement stmt = null;int i = 0;try {// 通过连接对象创建一个语句对象stmt，用来执行sql语句stmt = conn.createStatement();// 执行更新语句，并返回影响了多少行i = stmt.executeUpdate(sql);} catch (Exception e) { // 错误处理，暂时不用理会e.printStackTrace();} finally {try {stmt.close();} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}return i;}public static void close(Connection conn, Statement stmt, ResultSet rs) {try {if (rs != null) {rs.close();rs = null;}if (stmt != null) {stmt.close();stmt = null;}if (conn != null) {conn.close();conn = null;}} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

Javebean生成类：

import java.awt.BorderLayout;import java.awt.Color;import java.awt.EventQueue;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileWriter;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.sql.Connection;import java.sql.ResultSet;import java.sql.SQLException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Properties;import javax.swing.JButton;import javax.swing.JCheckBox;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.UIManager;import javax.swing.UnsupportedLookAndFeelException;/** * 此类用来将mysql的表直接生成Bean *  * @author Ming */public class MySQLToBean extends JFrame {/** *  */private static final long serialVersionUID = 1L;private JCheckBox checkBox;Properties p = new Properties();String configFile = "config.ini";private JLabel lblNewLabel_4;public MySQLToBean() {setResizable(false);setTitle("MySQL生成javabean小工具");setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);setBounds(100, 100, 484, 324);JPanel panel = new JPanel();getContentPane().add(panel, BorderLayout.CENTER);panel.setLayout(null);txtLocalhost = new JTextField();txtLocalhost.setText("localhost");txtLocalhost.setBounds(146, 10, 147, 21);panel.add(txtLocalhost);txtLocalhost.setColumns(10);JLabel lblIp = new JLabel("IP:");lblIp.setBounds(80, 13, 30, 15);panel.add(lblIp);JLabel label = new JLabel("数据库:");label.setBounds(80, 42, 54, 15);panel.add(label);textField = new JTextField();textField.setBounds(146, 39, 147, 21);panel.add(textField);textField.setColumns(10);JLabel label_1 = new JLabel("表名:");label_1.setBounds(80, 127, 54, 15);panel.add(label_1);textField_1 = new JTextField();textField_1.setBounds(146, 124, 147, 21);panel.add(textField_1);textField_1.setColumns(10);JLabel label_2 = new JLabel("包名:");label_2.setBounds(79, 156, 54, 15);panel.add(label_2);txtComyourcom = new JTextField();txtComyourcom.setText("com.yourcom.bean");txtComyourcom.setBounds(146, 155, 147, 21);panel.add(txtComyourcom);txtComyourcom.setColumns(10);JLabel lblNewLabel = new JLabel("输出目录：");lblNewLabel.setBounds(80, 190, 65, 15);panel.add(lblNewLabel);textField_3 = new JTextField();textField_3.setBounds(146, 186, 147, 21);panel.add(textField_3);textField_3.setColumns(10);checkBox = new JCheckBox("生成包结构目录");checkBox.setSelected(true);checkBox.setBounds(145, 213, 147, 23);panel.add(checkBox);JLabel lblNewLabel_1 = new JLabel("可以指定表名，也可以不指定");lblNewLabel_1.setBounds(303, 127, 176, 15);panel.add(lblNewLabel_1);JLabel lblNewLabel_2 = new JLabel("* 数据库名");lblNewLabel_2.setForeground(Color.RED);lblNewLabel_2.setBounds(303, 42, 66, 15);panel.add(lblNewLabel_2);JLabel lblNewLabel_3 = new JLabel("* 包结构");lblNewLabel_3.setForeground(Color.RED);lblNewLabel_3.setBounds(303, 158, 79, 15);panel.add(lblNewLabel_3);JButton button = new JButton("执行");button.addActionListener(new ActionListener() {public void actionPerformed(ActionEvent e) {go();}});button.setBounds(145, 242, 93, 23);panel.add(button);textField_4 = new JTextField();textField_4.setText("123456");textField_4.setBounds(145, 93, 147, 21);panel.add(textField_4);textField_4.setColumns(10);txtRoot = new JTextField();txtRoot.setText("root");txtRoot.setBounds(145, 66, 148, 21);panel.add(txtRoot);txtRoot.setColumns(10);JLabel label_3 = new JLabel("用户名:");label_3.setBounds(80, 69, 54, 15);panel.add(label_3);JLabel label_4 = new JLabel("密码:");label_4.setBounds(80, 96, 54, 15);panel.add(label_4);lblNewLabel_4 = new JLabel("");lblNewLabel_4.setForeground(Color.RED);lblNewLabel_4.setBounds(248, 242, 204, 23);panel.add(lblNewLabel_4);addWindowListener(new WindowAdapter() {public void windowClosing(WindowEvent e) {super.windowClosing(e);export();System.exit(0);}});inport();}static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");private JTextField txtLocalhost;private JTextField textField;private JTextField textField_1;private JTextField txtComyourcom;private JTextField textField_3;private JTextField textField_4;private JTextField txtRoot;/** * @param args */public static void main(String[] args) {try {UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());} catch (ClassNotFoundException e) {e.printStackTrace();} catch (InstantiationException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();} catch (UnsupportedLookAndFeelException e) {e.printStackTrace();}EventQueue.invokeLater(new Runnable() {public void run() {try {MySQLToBean frame = new MySQLToBean();frame.setLocationRelativeTo(null);frame.setVisible(true);} catch (Exception e) {e.printStackTrace();}}});}private void inport() {File config = new File(configFile);if (config.exists()) {try {InputStream is = new FileInputStream(config);p.load(is);is.close();setUIVal();} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}} else {try {config.createNewFile();} catch (IOException e) {e.printStackTrace();}}}public void setUIVal() {txtLocalhost.setText(p.getProperty("host", "localhost"));textField.setText(p.getProperty("database", ""));txtRoot.setText(p.getProperty("user", "root"));textField_4.setText(p.getProperty("pass", "123456"));txtComyourcom.setText(p.getProperty("packname", "com.youcom.bean"));textField_3.setText(p.getProperty("dirstr", ""));textField_1.setText(p.getProperty("tablename", ""));}private void export() {String host = txtLocalhost.getText();String database = textField.getText();String user = txtRoot.getText();String pass = textField_4.getText();String packname = txtComyourcom.getText();String dirstr = textField_3.getText();// 空表示当前目录String tablename = textField_1.getText();p.setProperty("host", host);p.setProperty("database", database);p.setProperty("user", user);p.setProperty("pass", pass);p.setProperty("packname", packname);p.setProperty("dirstr", dirstr);p.setProperty("tablename", tablename);try {OutputStream out = new FileOutputStream(configFile);p.store(out, "退出保存文件," + sdf.format(new Date()));} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void setTips(String msg) {lblNewLabel_4.setText(msg);}public void go() {String host = txtLocalhost.getText();String database = textField.getText();if (database.length() == 0) {setTips("数据库名必填");return;}String user = txtRoot.getText();String pass = textField_4.getText();String packname = txtComyourcom.getText();String dirstr = textField_3.getText();// 空表示当前目录String tablename = textField_1.getText();boolean createPackage = checkBox.getSelectedObjects() != null;System.out.println(createPackage);if (dirstr != null && !dirstr.isEmpty()) {if (!dirstr.endsWith("/")) {dirstr += "/";}}File dir = new File(dirstr);if (createPackage) {dir = new File(dirstr + packname.replaceAll("\\.", "/"));if (!dir.exists()) {dir.mkdirs();}}String outputdir = dir.getAbsolutePath();// bean的生成目录Connection conn = null;try {conn = DBManager.mysql(host, database, user, pass);if (tablename.length() > 0) {parseTableByShowCreate(conn, tablename, packname, outputdir);} else {parseAllTable(conn, packname, outputdir);}} catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();setTips("找不到MySQL的jar包");} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/** * 开始处理生成所有表 如果不传入表名，表示将数据库中所有表生成bean; 可以指定表名生成bean; */public void parseAllTable(Connection conn, String packname, String outputdir) {String sql = "show tables";ResultSet rs = DBManager.query(conn, sql);try {while (rs.next()) {String tablename = rs.getString(1);parseTableByShowCreate(conn, tablename, packname, outputdir);}DBManager.close(conn, null, rs);} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/** * 通过 mysql的 show create table TABLE_NAME逆向生成Bean; *  * @param conn * @param tname * @param outputdir * @param packname */private void parseTableByShowCreate(Connection conn, String tablename,String packname, String outputdir) {StringBuilder classInfo = new StringBuilder("\t/**\r\n\t*");boolean shouldCloseConn = false;String sql = "desc " + tablename;ResultSet rs = null;try {rs = DBManager.query(conn, sql);StringBuilder fields = new StringBuilder();StringBuilder methods = new StringBuilder();int i = 0;while (rs.next()) {String fieldName = rs.getString("Field");System.out.println(rs.getString("Type"));String fieldType = "";if (rs.getString("Type").contains("(")) {fieldType = typeTrans(rs.getString("Type").substring(0,rs.getString("Type").indexOf("(")));} else {fieldType = typeTrans(rs.getString("Type"));}fields.append(getFieldStr(fieldName, fieldType, null));methods.append(getMethodStr(fieldName, fieldType));if (i == 0) {classInfo.append("此类由" + getClass().getSimpleName()+ "工具自动生成\r\n");classInfo.append("\r\n");classInfo.append("\t*@author \r\n");classInfo.append("\t*@since ");classInfo.append(sdf.format(new Date()));classInfo.append("\r\n\t*/\r\n\r\n");}i++;}classInfo.append("\tpublic class ").append(upperFirestChar(tablename)).append("{\r\n");classInfo.append(fields);classInfo.append(methods);classInfo.append("\r\n");classInfo.append("}");} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {DBManager.close(shouldCloseConn ? conn : null, null, rs);}String packageinfo = "package " + packname.replace("src.", "")+ ";\r\n\r\n";File file = new File(outputdir, upperFirestChar(tablename) + ".java");System.out.println(file.getAbsolutePath());try {FileWriter fw = new FileWriter(file);fw.write(packageinfo);fw.write(classInfo.toString());fw.flush();fw.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/** *  * @param type * @return */private String getMethodStr(String field, String type) {StringBuilder get = new StringBuilder("\tpublic ");get.append(type).append(" ");if (type.equals("boolean")) {get.append(field);} else {get.append("get");get.append(upperFirestChar(field));}get.append("(){").append("\r\n\t\treturn this.").append(field).append(";\r\n\t}\r\n");StringBuilder set = new StringBuilder("\tpublic void ");if (type.equals("boolean")) {set.append(field);} else {set.append("set");set.append(upperFirestChar(field));}set.append("(").append(type).append(" ").append(field).append("){\r\n\t\tthis.").append(field).append("=").append(field).append(";\r\n\t}\r\n");get.append(set);return get.toString();}public String upperFirestChar(String src) {return src.substring(0, 1).toUpperCase().concat(src.substring(1));}private String getFieldStr(String field, String type, String cmt) {StringBuilder sb = new StringBuilder();sb.append("\t").append("private ").append(type).append(" ").append(field).append(";");if (cmt != null) {sb.append("//").append(cmt);}sb.append("\r\n");return sb.toString();}/** * mysql的类型转换到java 类型参考文章 *  */public String typeTrans(String type) {if (type.contains("tinyint")) {return "boolean";} else if (type.contains("int")) {return "int";} else if (type.contains("varchar") || type.contains("date")|| type.contains("time") || type.contains("datetime")|| type.contains("timestamp") || type.contains("text")|| type.contains("enum") || type.contains("set")) {return "String";} else if (type.contains("binary") || type.contains("blob")) {return "byte[]";} else {return "String";}}}