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rrong_m — Tue, 07 Jul 2009 02:28:00 GMT

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http://rrong-m.javaeye.com/

rrong_m 2009-07-07 10:28 发表评论

sql版魔方算法

rrong_m — Mon, 22 Jun 2009 07:46:00 GMT

摘要: 有1－16的数字在SQL中输出输出的样式是 1 12 11 10 2 13 16 9 3 14 15 8 4 5 6 7 create procedure s... 阅读全文

rrong_m 2009-06-22 15:46 发表评论

mysql 保留字

rrong_m — Sun, 21 Jun 2009 11:11:00 GMT

摘要: ADD ALL ALTER ANALYZE AND AS ASC ... 阅读全文

rrong_m 2009-06-21 19:11 发表评论

java去标点符号正则

rrong_m — Fri, 19 Jun 2009 19:28:00 GMT

转载请注明:http://www.pmjava.com/?thread-62961-1.html

java代码

package com.test;
public class StringTest {
public static void main(String... args) {
String str = "!!！？？!!!!%*）%￥！KTV去符号标号！！当然。!!..**半角";
// System.out.println(str);
System.out.println(str.replaceAll("\\p{Punct}", ""));
System.out.println(str.replaceAll("\\pP", ""));
System.out.println(str.replaceAll("\\p{P}", ""));
}
}

rrong_m 2009-06-20 03:28 发表评论

java全角半角转换

rrong_m — Fri, 19 Jun 2009 19:18:00 GMT

摘要: Java代码 package com.test; public class test { public static void main(Strin... 阅读全文

rrong_m 2009-06-20 03:18 发表评论

Java代码的常见错误

rrong_m — Fri, 19 Jun 2009 19:01:00 GMT

摘要: Java代码代码审查是消灭Bug最重要的方法之一，这些审查在大多数时候都特别奏效。由于代码审查本身所针对的对象，就是俯瞰整个代码在测试过程中的问题和Bug。并且，代码审查对消除一些特别细节的错误大有裨益，尤其是那些能够容易在阅读代码的时候发现的错误，这些错误往往不容易通过机器上的测试识别出来。本文就常见的java代码中容易出现的问题提出一些建设性建议，以便您在审查代... 阅读全文

rrong_m 2009-06-20 03:01 发表评论

jsp 利用404错误页进行URL重写

rrong_m — Thu, 18 Jun 2009 06:20:00 GMT

1
2 java代码
3 有些时候为了SEO，尽可能的吧网站的URL弄成静态的，这样有利于搜索引擎的收录。
4 如果空间足够的话，可以把所有的网页生成静态的，而且打开速度也快。但如果条件不允许，又想实现那样的链接？可以通过伪静态，就是通过重新构造URL来实现 URL重写
5 首先定义一个404.jsp页面配置404错误  ，在web.xml里面配置
6 〈error-page〉
7   〈error-code〉404〈/error-code〉
8   〈location〉404.jsp〈/location〉
9   〈/error-page〉
10 〈%@ page language="java" contentType="text/html; charset=GBK" isErrorPage="true" pageEncoding="GBK"%〉
11  〈%
12    response.setStatus(HttpServletResponse.SC_OK);  //返回正常的状态
13    String key = (String) request.getAttribute("javax.servlet.forward.servlet_path");  //得到请求路径
14    if (key != null) {
15      int index = key.lastIndexOf("/");
16      if (index != -1) {
17        key = key.substring(index + 1);
18        if (key.startsWith("f") || key.startsWith("p")) {
19          try {
20            long id = Long.parseLong(key.substring(1));
21            String url = key.startsWith("f") ? "forumdisplay.jsp?fid=" : "viewthread.jsp?tid=";  //根据当前请求的URL分析然后处理
22  %〉
23  〈jsp:forward page="〈%=url+id%〉"〉〈/jsp:forward〉  // 跳转
24  〈%
25    return;
26          } catch (Exception ex) {}
27        }
28  %〉
29  〈jsp:forward page="〈%=response.encodeURL("search.jsp")%〉"〉〈jsp:param name="keyword" value="〈%=key %〉" /〉〈/jsp:forward〉
30  〈%
31    return;
32      }
33    }
34  %〉
35 转载请注明:http://www.pmjava.com/?thread-62953-1.html

rrong_m 2009-06-18 14:20 发表评论

Swing做的QQ

rrong_m — Thu, 18 Jun 2009 01:42:00 GMT

  1 java code 这是一个登陆页面,可以注册,说明这两个功能是可以实现的,大家可以猜一猜这两个是用什么控件?JLabel or JTextField?其实都不是其实就是JPanel是不是很漂亮?
  2 现在看到的就是主界面了,大家不要己为这些按钮都只是画的而没有功能哦,大家看我点状态按钮.说明是可以用的,这里的其它几个面板待开发中..
  3 我现在打开的是聊天窗口,这里面的功能也还不是很完善,大家知道我刚才点的这两个按钮功能是用什么控件完成的吗?不要己为是JSplitPane完成的哦,
  4 也是我自己定义的控件JSplitPane虽然可以完成以上功能,但是做出来的东东太难看了.再看下面这一条,哈哈,和QQ的面板是不是非常"像"?
  5 再看一个功能,看到没?自动隐藏功能..
  6 好了,演示就到这里,下面我介绍几个常用函数:
  7 2,下面我给出几个我这个JQchat里面用到的几个函数.
  8 *a******************************************************************************************
  9 /**
10 这里我现在设置的是windows风格,风格调用代码是:SystemStyles.setWindowsStyle(frame);
11  * 设置Windows风格界面
12  * @param comp
13  */
14 public static void setWindowsStyle(Component comp) {
15     try {
16         UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
17         initGlobalFontSetting(getFont());
18         SwingUtilities.updateComponentTreeUI(comp);
19     } catch (Exception e) {
20         e.printStackTrace();
21     }
22 }
23 风格设置之后就得设置字体了.
24 /**    设置全局字体
25  *     eg:initGlobalFontSetting("宋体");
26  */
27 @SuppressWarnings("unchecked")
28 public static void initGlobalFontSetting(Font fnt) {
29     FontUIResource fontRes = new FontUIResource(fnt);
30     for (Enumeration keys = UIManager.getDefaults().keys(); keys.hasMoreElements();) {
31         Object key = keys.nextElement();
32         Object value = UIManager.get(key);
33         if (value instanceof FontUIResource)
34             UIManager.put(key, fontRes);
35     }
36 }
37 以上的函数只是是做CS的项目基本上都会用到的, 是很基本的东西,第二个函数是我昨天写的,调整窗体大小的函数,
38 如果需要像我一样自定义上面的标题栏,那就要用到这个函数了(调整窗体函数),看到没,我没有用自带的标题栏,
39 而是自己定义的,如果需要自己定义标题栏,那么就需要把原来的标题栏隐藏掉,但是如果隐藏掉标题栏后就不可以调整窗体大小,所以我就写了一个函数.
40 假设我现在需要将这个变大一点点是不是不可以,?因为我把标题栏隐藏掉了,但是如果我把另外一个代码加上去就可以了.
41 *b******************************************************************************************
42 以下是代码,大家可以收藏.如果仔细观察相信大家都看得懂..
43 再看我刚才的这个点击标题栏托动的功能?其实也是要自己写的.大家自己去练练手吧.演示教程就到这里,记住哦,如果大家有兴趣的话等这个软件功能完成后我会在网站上面公布源代码.
44 今天中秋,祝大家中秋快乐.~
45 /**
46      * adjust the window's size
47      * @param frame the Object of window
48      * @param a        the length of top
49      * @param b        the length of bottom
50      * @param c        the length of left
51      * @param d        the length of right
52      * @param minWidth    the window's minwidth
53      * @param minHeight    the window's minheight
54      */
55     public static void setCanResize(final Window frame,final int a,final int b,final int c,final int d,final int minWidth,final int minHeight){
56         frame.addMouseMotionListener(new MouseMotionAdapter() {
57             int x1,y1,x2,y2;
58             public void mouseMoved(final MouseEvent e) {
59                 Point mousePoint = e.getLocationOnScreen();
60                 Point framePoint = frame.getLocationOnScreen();
61                 if(mousePoint.x>=framePoint.x && mousePoint.x<=framePoint.x + c && mousePoint.y>=framePoint.y + a && mousePoint.y<=framePoint.y + frame.getHeight() -b){
62                     frame.setCursor(Cursor.getPredefinedCursor(Cursor.W_RESIZE_CURSOR));
63                 }else if(mousePoint.x>=framePoint.x + frame.getWidth() - d && mousePoint.x <= framePoint.x + frame.getWidth() && mousePoint.y>=framePoint.y + a && mousePoint.y<=framePoint.y + frame.getHeight() -b){
64                     frame.setCursor(Cursor.getPredefinedCursor(Cursor.E_RESIZE_CURSOR));
65                 }else if(mousePoint.x >=framePoint.x + c && mousePoint.x <=framePoint.x + frame.getWidth() -d && mousePoint.y >=framePoint.y && mousePoint.y <= framePoint.y + a){
66                     frame.setCursor(Cursor.getPredefinedCursor(Cursor.N_RESIZE_CURSOR));
67                 }else if(mousePoint.x >= framePoint.x + c && mousePoint.x <=framePoint.x + frame.getWidth()-d && mousePoint.y >= framePoint.y + frame.getHeight() -b && mousePoint.y<= framePoint.y + frame.getHeight()){
68                     frame.setCursor(Cursor.getPredefinedCursor(Cursor.S_RESIZE_CURSOR));
69                 }else if(mousePoint.x >= framePoint.x && mousePoint.x < framePoint.x + c && mousePoint.y >= framePoint.y && mousePoint.y < framePoint.y + a){
70                     frame.setCursor(Cursor.getPredefinedCursor(Cursor.NW_RESIZE_CURSOR));
71                 }else if(mousePoint.x > framePoint.x + frame.getWidth() -d && mousePoint.x <= framePoint.x + frame.getWidth() && mousePoint.y >= framePoint.y && mousePoint.y < framePoint.y + a){
72                     frame.setCursor(Cursor.getPredefinedCursor(Cursor.NE_RESIZE_CURSOR));
73                 }else if(mousePoint.x >= framePoint.x && mousePoint.x < framePoint.x + c && mousePoint.y > framePoint.y + frame.getHeight() - b && mousePoint.y <= framePoint.y + frame.getHeight()){
74                     frame.setCursor(Cursor.getPredefinedCursor(Cursor.SW_RESIZE_CURSOR));
75                 }else if(mousePoint.x > framePoint.x + frame.getWidth() -d && mousePoint.x <= framePoint.x + frame.getWidth() && mousePoint.y > framePoint.y + frame.getHeight()
76 - b && mousePoint.y <= framePoint.y + frame.getHeight()){
77                     frame.setCursor(Cursor.getPredefinedCursor(Cursor.SE_RESIZE_CURSOR));
78                 }else{
79                     frame.setCursor(Cursor.getDefaultCursor());
80                     x1 = -1;
81                     return;
82                 }
83                 x1 = framePoint.x;
84                 y1 = framePoint.y;
85                 x2 = framePoint.x + frame.getWidth();
86                 y2 = framePoint.y + frame.getHeight();
87             }
88             public void mouseDragged(final MouseEvent e) {
89                 if(x1 < 0){
90                     return;
91                 }
92                 int type = frame.getCursor().getType();
93                 Point p = e.getLocationOnScreen();
94                 switch (type){
95                 case Cursor.W_RESIZE_CURSOR:
96                     frame.setBounds(p.x, y1, (x2 - p.x)>minWidth?(x2 - p.x):minWidth, frame.getHeight()>minHeight?frame.getHeight():minHeight);
97                     break;
98                 case Cursor.E_RESIZE_CURSOR:
99                     frame.setBounds(x1, y1, (p.x - x1)>minWidth?(p.x - x1):minWidth, frame.getHeight()>minHeight?frame.getHeight():minHeight);
100                     break;
101                 case Cursor.N_RESIZE_CURSOR:
102                     frame.setBounds(x1, p.y, frame.getWidth()>minWidth?(frame.getWidth()):minWidth, (y2 - p.y)>minHeight?(y2 - p.y):minHeight);
103                     break;
104                 case Cursor.S_RESIZE_CURSOR:
105                     frame.setBounds(x1, y1, frame.getWidth()>minWidth?(frame.getWidth()):minWidth, (p.y - y1)>minHeight?(p.y - y1):minHeight);
106                     break;
107                 case Cursor.NW_RESIZE_CURSOR:
108                     frame.setBounds(p.x, p.y, (x2 - p.x)>minWidth?(x2 - p.x):minWidth, (y2 - p.y)>minHeight?(y2 - p.y):minHeight);
109                     break;
110                 case Cursor.NE_RESIZE_CURSOR:
111                     frame.setBounds(x1, p.y, (p.x - x1)>minWidth?(p.x - x1):minWidth, (y2 - p.y)>minHeight?(y2 - p.y):minHeight);
112                     break;
113                 case Cursor.SW_RESIZE_CURSOR:
114                     frame.setBounds(p.x, y1, (x2 - p.x)>minWidth?(x2 - p.x):minWidth, (p.y - y1)>minHeight?(p.y - y1):minHeight);
115                     break;
116                 case Cursor.SE_RESIZE_CURSOR:
117                     frame.setBounds(x1, y1, (p.x - x1)>minWidth?(p.x - x1):minWidth, (p.y - y1)>minHeight?(p.y - y1):minHeight);
118                     break;
119                 }
120             }
121         });
122     }
123
124
125
126
127
128

rrong_m 2009-06-18 09:42 发表评论

java substring截取字符串汉字和字母

rrong_m — Wed, 17 Jun 2009 04:16:00 GMT

http://ww.pmjava.com/

1 int i=0;
2     String tempstr="";
3     for(int j=0;j <str.length();j++)
4     {
5     i=i+String.valueOf(str.charAt(j)).getBytes().length;
6     if(i <=25){
7     tempstr=tempstr+String.valueOf(str.charAt(j));
8     }
9     }
10     if(tempstr.length()!=str.length())
11      {
12      str=tempstr+"";
13      }
14

rrong_m 2009-06-17 12:16 发表评论

java链接数据库的一个CLASS

rrong_m — Wed, 17 Jun 2009 01:43:00 GMT

package com.pmjava.jdbcdb;

import java.io.PrintStream;
import java.sql.*;
import java.util.Properties;
import javax.sql.DataSource;

public class DBConnect
{

    private static DataSource ds;
    private Connection conn;
    private Statement stmt;
    private PreparedStatement prepstmt;
    private ResultSet rs;
    private String dbDriver;
    private String dbUrl;
    private String dbUser;
    private String dbPassword;

    private DBConnect()
    {
        conn = null;
        stmt = null;
        prepstmt = null;
        rs = null;
        dbDriver = "";
        dbUrl = "";
        dbUser = "";
        dbPassword = "";
        try
        {
            init();
            try
            {
                Class.forName(dbDriver);
            }
            catch (ClassNotFoundException e)
            {
                System.out.println("引导数据库驱动错误：" + e.getMessage());
            }
            conn = DriverManager.getConnection(dbUrl, dbUser, dbPassword);
            conn.setAutoCommit(true);
            stmt = conn.createStatement();
        }
        catch (SQLException e)
        {
            System.out.println("创建数据库连接错误：" + e.getMessage());
        }
    }

    private void init()
    {
        java.io.InputStream is = getClass().getResourceAsStream("/database.properties");
        Properties dbProps = new Properties();
        try
        {
            dbProps.load(is);
            dbDriver = dbProps.getProperty("driver", "com.mysql.jdbc.Driver");
            dbUrl = dbProps.getProperty("url", "jdbc:mysql://localhost/db?autoReconnect=true&defaultAutoCommit=false&useUnicode=true&characterEncoding=gbk");
            dbUser = dbProps.getProperty("username", "1111111");
            dbPassword = dbProps.getProperty("password", "111111");
        }
        catch (Exception e)
        {
            System.err.println("不能读取属性文件:请确保database.properties在CLASSPATH指定的路径中");
            return;
        }
    }

    public static DBConnect getInstance()
    {
        return new DBConnect();
    }

    public DataSource getDataSource()
    {
        return ds;
    }

    public Connection getConnection()
    {
        return conn;
    }

    public void setAutoCommit(boolean bool)
        throws SQLException
    {
        conn.setAutoCommit(bool);
    }

    public void prepareStatement(String sql)
        throws SQLException
    {
        clearParameters();
        prepstmt = conn.prepareStatement(sql, 1004, 1008);
    }

    public ResultSet executePrepQuery()
        throws SQLException
    {
        if (prepstmt != null)
            return prepstmt.executeQuery();
        else
            return null;
    }

    public int executePrepUpdate()
        throws SQLException
    {
        if (prepstmt != null)
            return prepstmt.executeUpdate();
        else
            return 0;
    }

    public void setString(int index, String value)
        throws SQLException
    {
        prepstmt.setString(index, value);
    }

    public void setInt(int index, int value)
        throws SQLException
    {
        prepstmt.setInt(index, value);
    }

    public void setBoolean(int index, boolean value)
        throws SQLException
    {
        prepstmt.setBoolean(index, value);
    }

    public void setDate(int index, Date value)
        throws SQLException
    {
        prepstmt.setDate(index, value);
    }

    public void setLong(int index, long value)
        throws SQLException
    {
        prepstmt.setLong(index, value);
    }

    public void setFloat(int index, float value)
        throws SQLException
    {
        prepstmt.setFloat(index, value);
    }

    public void setBytes(int index, byte value[])
        throws SQLException
    {
        prepstmt.setBytes(index, value);
    }

    public void setInteger(int index, Integer value)
        throws SQLException
    {
        prepstmt.setLong(index, value.longValue());
    }

    public void setShort(int index, short value)
        throws SQLException
    {
        prepstmt.setShort(index, value);
    }

    private void clearParameters()
    {
        try
        {
            prepstmt.clearParameters();
            prepstmt.close();
            prepstmt = null;
        }
        catch (Exception exception) { }
    }

    private void clearStmt()
    {
        try
        {
            stmt.close();
            stmt = null;
        }
        catch (Exception exception) { }
    }

    public int executeUpdate(String sql)
        throws SQLException
    {
        clearStmt();
        if (stmt == null)
            stmt = conn.createStatement();
        return stmt.executeUpdate(sql);
    }

    public ResultSet executeQuery(String sql)
        throws SQLException
    {
        clearStmt();
        if (stmt == null)
            stmt = conn.createStatement(1004, 1008);
        return stmt.executeQuery(sql);
    }

    public void commit()
        throws SQLException
    {
        conn.commit();
    }

    public void rollback()
        throws SQLException
    {
        conn.rollback();
    }

    public void close()
    {
        try
        {
            if (stmt != null)
            {
                stmt.close();
                stmt = null;
            }
            if (prepstmt != null)
            {
                prepstmt.clearParameters();
                prepstmt.close();
                prepstmt = null;
            }
            if (conn != null)
                conn.close();
        }
        catch (SQLException ex)
        {
            System.out.println("数据库连接关闭错误:" + ex.getMessage());
        }
    }

    public static void main(String args[])
    {
        DBConnect DBConnect1 = new DBConnect();
    }
}

站长原创:www.pmjava.com

rrong_m 2009-06-17 09:43 发表评论

语源科技BlogJava-java编程

博客搬家

sql版 魔方算法

mysql 保留字

java去标点符号 正则

java全角半角转换

Java代码的常见错误

jsp 利用404错误页进行URL重写

Swing做的QQ

java substring截取字符串 汉字和字母

java链接数据库的一个CLASS

sql版魔方算法

java去标点符号正则

java substring截取字符串汉字和字母