【代码总结● Swing中的一些操作与设置】

Swing中设置关闭窗口验证与添加背景图片

package com.swing.test;

import java.awt.EventQueue;
import java.awt.Image;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

/**
 *@Title BackGroundPic.java
 *@description TODO
 *@ time 2018-8-31 下午11:11:50
 *@author Anderson
 *@version 1.0
 */
public class BackGroundPic extends JFrame {
    private static final long serialVersionUID = 1L;

    private JPanel contentPane;//最大的Jpanel层
    private JLabel lblBackgroundl;//背景图片标签

    /**
     * Create the frame.
     */
    public BackGroundPic() {
        contentPane = new JPanel();
        setContentPane(contentPane);
        contentPane.setLayout(null);//绝对布局
        setResizable(false);//不允许用户自定义大小
        setSize(612 ,398);//设置Jpanel大小
        setLocationRelativeTo(null);//居中

        //设置点关闭后什么也不做.为添加关闭窗口验证做铺垫
        setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);

        /**
         * 为整个窗口添加退出确认,前提是
         * setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
         */
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                int isExits = JOptionPane.showConfirmDialog(null, "确认退出吗?",
                        "Exit", JOptionPane.OK_CANCEL_OPTION,
                        JOptionPane.QUESTION_MESSAGE);
                if (isExits == JOptionPane.OK_OPTION) {
                    System.exit(0);
                }
            }
        });

/**********************设置背景图片***********************/
        /**
         * @author Administrator
         * getScaledInstance(width,height,hints);
         * //width,height,hints为方法中的参数
         * width the width to which to scale the image.
         * height the height to which to scale the image.
         * hints flags to indicate the type of algorithm to use for image resampling.
         * //指示用于图像重新取样的算法类型的标志，指定缩放的比例算法
         */
        ImageIcon background = new ImageIcon("./img/login_box.jpg");
        background.setImage(
                background.getImage().getScaledInstance(
                        background.getIconWidth(), background.getIconHeight(),
                        Image.SCALE_DEFAULT
                        )
                );
        lblBackgroundl = new JLabel();
        lblBackgroundl.setBounds(0, 0, 608, 369);
        lblBackgroundl.setIcon(background);
        lblBackgroundl.setHorizontalAlignment(0);
        getContentPane().add(lblBackgroundl);
        System.out.println(
        "图片宽: "+background.getIconWidth() +
        "高:" + background.getIconHeight()
        );
/**********************以上,设置背景图片***********************/    

    }

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    BackGroundPic frame = new BackGroundPic();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

}

字符串下拉框的设置

private static JComboBox<String> cobAuth;

cobAuth = new JComboBox<String>();
cobAuth.setBounds(244, 235, 147, 21);

cobAuth.addItem("Leader");//添加下拉内容
cobAuth.addItem("Worker");
//cobAuth.setSelectedIndex(0);//设置默认显示下拉框
contentPane.add(cobAuth);

//获取下拉框值
private static String auth1;
auth1 = (String) cobAuth.getSelectedItem();

密码输入框的设置

private static JPasswordField pwdField;

pwdField = new JPasswordField();
pwdField.setBounds(244, 210, 147, 21);
contentPane.add(pwdField);

//获取密码框值
private static String pwd1;
pwd1 = String.valueOf(pwdField.getPassword()).trim();

自己写的一些判断的工具类

package pers.jason.market.util;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 工具包
 * @author Administrator
 *
 */
public final class Util {
    /**
     * 判断字符串是否为空
     * @param str
     * @return
     */
    public static boolean isEmpty(String str) {
        return null == str || "" .equals(str.trim()) ? true : false;
    }
    /**
     * 判断字符串是否为整数
     * @Title : isNumber
     * @Description:
     * @param str
     * @return
     * @return boolean
     * @author Anderson
     * @data 2018-8-23 下午10:05:06
     */
    public static boolean isInt (String str){

        Pattern pattern = Pattern.compile("[0-9]+");
           Matcher isNum = pattern.matcher(str);
           if( !isNum.matches() ){
               return false;
           }
        return true;
    }
    /**
     * 判断是否为小数
     * @Title : isDouble
     * @Description:
     * @param str
     * @return
     * @return boolean
     * @author Anderson
     * @data 2018-8-23 下午10:59:04
     */
    public static boolean isDouble (String str){
        String [] num = str.split("\\.");
        if(num.length == 2 && isInt(num[0]) && isInt(num[1]) ){
            return true;
        }
        return false;
    }
    /**
     *
     * @Title : isDolores
     * @Description:判断是否为美元
     * @param str
     * @return
     * @return boolean
     * @author Anderson
     * @data 2018-8-27 上午11:38:26
     */
    public static boolean isDolores(String str){
        if("$".equals(str)){
        return true;
        }else
            return false;
    }
    /**
     *
     * @Title : isRMB
     * @Description: 判断是否为人民币
     * @param str
     * @return
     * @return boolean
     * @author Anderson
     * @data 2018-8-27 下午12:33:11
     */
    public static boolean isRMB(String str){
        if("¥".equals(str)){
            return true;
        }
        return false;
    }
}

object.properties 配置文件(对象属性)

Transaction=pers.jason.market.transaction.impl.TransactionImpl
UserDao=pers.jason.market.dao.impl.UserDaoImpl
UserService=pers.jason.market.service.impl.UserServiceImpl
AccountDao=pers.jason.market.dao.impl.AccountDaoImpl
AccountService=pers.jason.market.service.impl.AccountServiceImpl
SupplierDao=pers.jason.market.dao.impl.SupplierDaoImpl
SupplierService=pers.jason.market.service.impl.SupplierServiceImpl

SupplierGroupDao=pers.jason.market.dao.impl.SupplierGroupDaoImpl
SupplierGroupService=pers.jason.market.service.impl.SupplierGroupServiceImpl
GoodsGroupDao=pers.jason.market.dao.impl.GoodsGroupDaoImpl
GoodsGroupService=pers.jason.market.service.impl.GoodsGroupServiceImpl

等号左边是接口,等号右边是其对应的实现类所在的包及实现类本身

之所以要写这个,是因为要写对象工厂

对象工厂

package pers.jason.market.object.factoy;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
/**
 *
 * @Title ObjectFactory.java
 * @description TODO 对象工厂
 * @time 2018-8-20 下午3:11:19
 * @author Anderson
 * @version 1.0 ok
 */
public final class ObjectFactory {
    private static Map<String, Object> objectMap  = new HashMap<String,Object>();
    static {
        Properties properties = new Properties();
        try {
            properties.load(new FileInputStream("Object.properties"));
            Enumeration<?> enumeration =properties.keys();
            while(enumeration.hasMoreElements()) {
                String key = (String)enumeration.nextElement();
                String value = properties.getProperty(key);
                objectMap.put(key, Class.forName(value).newInstance());
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
    public static Object getInstance(String key) {//得到对象
        //System.out.println(key+"："+objectMap.get(key));
        return objectMap.get(key);
    }

}

事务管理接口

package pers.jason.market.transaction;
/**
 *@Title Transaction.java
 *@description TODO 事务管理接口
 *@ time 2018-8-18 下午11:50:51
 *@author Anderson
 *@version 1.0
 */
public interface Transaction {

    /**
     *
     * @Title : begin
     * @Description:事务开启
     * @return void
     * @author Anderson
     * @data 2018-8-18 下午11:51:21
     */
    public  abstract  void begin();

    /**
     *
     * @Title : commit
     * @Description:事务提交
     * @return void
     * @author Anderson
     * @data 2018-8-18 下午11:51:26
     */
    public  abstract  void commit();

    /**
     *
     * @Title : rollback
     * @Description:事务回滚
     * @return void
     * @author Anderson
     * @data 2018-8-18 下午11:51:30
     */
    public  abstract  void rollback();
}

事务管理接口实现类

package pers.jason.market.transaction.impl;

import java.sql.Connection;
import java.sql.SQLException;

import pers.jason.market.transaction.Transaction;
import pers.jason.market.util.JDBCUtil;

/**
 *@Title TransactionImpl.java
 *@description TODO 事务管理接口实现类
 *@ time 2018-8-18 下午11:52:59
 *@author Anderson
 *@version 1.0 照抄完毕
 */
public class TransactionImpl implements Transaction{

    /**
     * 事务开启
     */
    @Override
    public void begin() {
        Connection conn = JDBCUtil.getConnection();
        try {
            conn.setAutoCommit(false);//false为禁止自动提交
        } catch (SQLException e) {
            e.printStackTrace();
        }

    }

    /**
     * 事务提交
     */
    @Override
    public void commit() {
        Connection conn = JDBCUtil.getConnection();
        try {
            conn.commit();//事务提交
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            JDBCUtil.closeConnection(conn);
        }

    }

    /**
     * 事务回滚
     */
    @Override
    public void rollback() {
        Connection conn = JDBCUtil.getConnection();
        try {
            conn.rollback();//事务回滚
        } catch (SQLException e) {
            e.printStackTrace();
        }finally {
            JDBCUtil.closeConnection(conn);
        }
    }
}

加载数据库的连接类

package pers.jason.market.util;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;

import javax.sql.DataSource;

import org.apache.commons.dbcp.BasicDataSourceFactory;

/**
 *@Title JDBCUtil.java
 *@description TODO 加载数据库的连接类
 *@ time 2018-8-18 下午11:58:34
 *@author Anderson
 *@version 1.0 照抄完毕
 */

public final class JDBCUtil {
    private static DataSource  dataSource =null;
    private static ThreadLocal<Connection> threadLocal = new ThreadLocal<Connection>();
    static {
        Properties properties = new Properties();
        try {
            //读取配置文件
            properties.load(new FileInputStream("database.properties"));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        try {
            dataSource = BasicDataSourceFactory.createDataSource(properties);//加载配置文件
        } catch (Exception e1) {
            e1.printStackTrace();
        }
    }

    /**
     * 获取连接
     * @return
     */
    public static Connection getConnection() {
        Connection conn = threadLocal.get();//从线程局部变量map中取出连接
        if(null == conn) {//首次获取连接为null。要读取配置文件获取连接
            try {
                conn =dataSource.getConnection();//获取连接
                threadLocal.set(conn);//保存连接到局部变量中
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
        return conn;
    }

    /**
     * 关闭连接
     * @param conn
     */
    public static void closeConnection(Connection conn) {
        if(null != conn) {
            threadLocal.remove();//先从局部变量中删除
            try {
                conn.close();//然后再关闭自身连接
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }

}

其中配置文件为:(database.properties)
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/db_market
username=root
password=cc321321

JDBC管理类

package pers.jason.market.util;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import pers.jason.market.rowmapper.RowMapper;

/**
 * JDBC管理类
 * @author Administrator
 *
 */
public  final class JDBCTemplate {
    /**
     * 增删改方法
     * @param sql
     * @param param
     * @return
     * @throws SQLException
     */
    public static int executeUpdate(String sql,Object ...param) {
        int rows=-1;
        Connection conn=JDBCUtil.getConnection();
        try {
            PreparedStatement ps=conn.prepareStatement(sql);
            if(null!=param && param.length>0){
                for (int i = 0; i < param.length; i++) {
                    ps.setObject((i+1), param[i]);
                }

            }
            rows=ps.executeUpdate();
            close(null,ps);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return rows;

    }

    /**
     * 查询方法
     * @param sql
     * @param rowmapper
     * @param param
     * @return
     * @throws SQLException
     */

    public static   List<Object> executeQuery(String sql,RowMapper rowmapper,Object ...param) throws SQLException {
        List<Object> list = new ArrayList<Object>();
        Connection conn = JDBCUtil.getConnection();//获取连接
        PreparedStatement ps = conn.prepareStatement(sql);
        if(null != param && param.length>0) {
            for (int i = 0; i < param.length; i++) {
                ps.setObject((i+1), param[i]);// 占位符从1开始   下标从0开始
            }
        }
        System.out.println("JDBC 中PS:    " + ps);                                         //测试
        ResultSet rs = ps.executeQuery();
        while(rs.next()) {
            Object obj = rowmapper.getObjectMapper(rs);
            list.add(obj);
        }
        close(rs,ps);
        return list;
    }

    private static void close(ResultSet rs,PreparedStatement ps) throws SQLException {
        if(null != rs) {
            rs.close();
        }
        if(null != ps) {
            ps.close();
        }
    }

}