Java 常用的30个通用功能工具类梳理(如:CookieCounter、MD5工具类、分页split_page.jsp、获取绝对路径 .java、记录log日志文件等)

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java常见的30个工具类

我们在java开发中有很多常见的功能,像常见的字符串、日期、cookie的操作、日志、文件等的操作,加解密操作,这些每次都是用到了然后再去百度,很浪费时间,这里给大家梳理了常见的这些工具类,可以帮助你在开发中节省很多搜索的时间。同时,对这些常见的操作,多加练习,也可以稳固提升自己的编程能力。

工具类截图

part1:
在这里插入图片描述
part2:
在这里插入图片描述

工具清单

[工具类] CookieCounter .java.txt
[工具类] Java中计算任意两个日期之间的工作天
[工具类] java抓取网页 .java.txt
[工具类] MD5 .java.txt
[工具类] MD5强化版 .java.txt
[工具类] MD5超强化版 .java.txt
[工具类] XML 实用工具类 .java.txt
[工具类] XML工具类2 .java.txt
[工具类] 一个压缩工具类.java.txt
[工具类] 中文验证.jsp.txt
[工具类] 使用Java程序来实现HTTP文件的队列下
[工具类] 分页split_page.jsp .jsp.txt
[工具类] 序列化保存为XML文件的工具类 .java.
[工具类] 文件FileUtil.java
[工具类] 文件操作工具类 .java.txt
[工具类] 日期DateUtil.java
[工具类] 时间Time.java
[工具类] 时间工具TimeUtil.java
[工具类] 框架StringUtil.java
[工具类] 测试Mysql的最大连接数 .java.txt
[工具类] 用java编写简单UDP网络通信程序 .jav
[工具类] 获取绝对路径 .java.txt
[工具类] 获得汉字拼音首字母的java工具类.jav
[工具类] 记录log日志文件的工具类 .java.txt
[工具类] 读取、打印输出、保存xml .java.txt
[工具类] 连接数据库的工具类 .java.txt
[工具类] 连数据库ConnectDB.java
[工具类] 通信客户端simpleClient.java
[工具类] 通信服务端simpleServer.java
[工具类] 验证码img .jsp.txt

工具类分类

1、文件(IO、文件、日志读写)操作类
2、通信类
3、jsp相关操作类
4、日期处理类
5、加解密操作类
6、字符串操作类
7、数据库操作类
8、其他

代码

[工具类] CookieCounter .java


import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
 * <p>Title: servlet读取cookie</p>
 * <p>Description: 这个servlet演示怎样创建和获取cookie并设置cookie的期限</p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Filename: CookieCounter.java</p>
 * @author 杜江
 * @version 1.0
 */
//必须继承HttpServlet类
public class CookieCounter extends HttpServlet {
  private int pageCount = 0;

/**
 *<br>方法说明:初始化
 *<br>输入参数:ServletConfig config 服务器配置对象
 *<br>返回类型:
 */

  public void init(ServletConfig config) throws ServletException  {
    super.init(config);
  }
/**
 *<br>方法说明:实现service方法
 *<br>输入参数:HttpServletRequest req 客户请求对象
 *<br>输入参数:HttpServletResponse res 服务器应答对象
 *<br>返回类型:
 */
  public void service(HttpServletRequest req, HttpServletResponse res)
       throws IOException
  {
    boolean cookieFound = false;
    Cookie thisCookie = null;
    
    // 设置内容类型
    res.setContentType("text/html; charset=GB2312");
    // 调用getWriter()
    PrintWriter out = res.getWriter();
    
    // 从请求获取coolies
    Cookie[] cookies = req.getCookies();
    
    if(cookies!=null){
      for(int i=0; i < cookies.length; i++) {
        thisCookie = cookies[i];
        //检查是否存在CookieCount数据
        if (thisCookie.getName().equals("CookieCount")) {
          cookieFound = true;
          break;
        }
      }
    }
    if (cookieFound == false) {
      // 创建新的Cookie并设置它的存活期
      thisCookie = new Cookie("CookieCount", "1");
      thisCookie.setMaxAge(60*1);
      // 在response对象中加入cookie
      res.addCookie(thisCookie);
    }
    //输出页面
    out.println("<html><head>\n" + "<title>Cookie计数器</title></head><body>\n" +
                "<center><h1>Cookie 计数器</h1></center></font>");
    pageCount++;
    out.println("<p>");
    out.println("<font color=blue size=+1>");
    out.println("<p><br><br><br>这个页面您已经拜访了 " + pageCount + 
                " 次.\n");
    
    // 显示客户端详细信息,是否存在计数器cookie
    if (cookieFound) {
      int cookieCount = Integer.parseInt(thisCookie.getValue());
      cookieCount++;
      // 设置cookie的新值, 加到相应对象中
      thisCookie.setValue(String.valueOf(cookieCount));
      thisCookie.setMaxAge(10);
      res.addCookie(thisCookie);
      
      out.println("<p>这是你近10秒内第 " +
                  thisCookie.getValue() +
                  " 次拜访这一页\n");
      
    } else {
      out.println("<p>你在近10秒内没有拜访过此页或者你的浏览器不支持cookie "+
                  "如果你的浏览器支持cookie,请确认是否打开了!\n");
    }
    out.println("</body></html>");
    
  }
}



[工具类] 连数据库ConnectDB.java:

package com.common.database;

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

/**
 * 功能描述:连接数据库-mysql/oracle
 * 
 * @author :FangHewei
 * @Date :Jul 18, 2008
 * @Time :3:28:59 PM
 * @version :1.0
 */
public class ConnectDB {

	private static final String MYSQL = "jdbc:mysql://";

	private static final String ORACLE = "jdbc:oracle:thin:@";

	private static final String SQLSERVER = "jdbc:microsoft:sqlserver://";
	private ConnectDB() {
	}

	public static Connection getConnection(String DBType, String url,
			String user, String password) throws SQLException {
		if ("mysql".equalsIgnoreCase(DBType))
			return getMySqlConn(url, user, password);
		if ("oracle".equalsIgnoreCase(DBType))
			return getOracleConn(url, user, password);
		if ("sqlserver".equals(DBType)){
			return getSqlServerConn(url, user, password);
		}
		return null;
	}

	public static void closeConn(Connection conn) {
		if (conn != null) {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}

	private static Connection getMySqlConn(String url, String user,
			String password) throws SQLException {
		Connection conn = null;
		try {
			Class.forName("com.mysql.jdbc.Driver");// 加载驱动
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		conn = DriverManager.getConnection(MYSQL + url, "root", "root");

		return conn;
	}

	private static Connection getOracleConn(String url, String user,
			String password) throws SQLException {
		Connection conn = null;
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver");// 加载驱动
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		conn = DriverManager.getConnection(ORACLE + url, "scott", "tiger");

		return conn;
	}
	
	private static Connection getSqlServerConn(String url, String user,
			String password) throws SQLException {
		Connection conn = null;
		try {
			Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");// 加载驱动
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		}
		conn = DriverManager.getConnection(SQLSERVER + url, "root", "root");

		return conn;
	}
	public static void main(String[] args) {
		try {
			Connection conn = getConnection("MySQL", "127.0.0.1", "root",
					"root");
			if (conn == null) {
				System.out.println("Connection the database is failled !");
			} else {
				System.out.println(conn.toString());
			}
		} catch (SQLException e) {
			e.printStackTrace();
		}

	}

}


[工具类] MD5 .java:

 /************************************************
    MD5 算法的Java Bean
    Last Modified:10,Mar,2001
    *************************************************/
    import java.lang.reflect.*;
    /*************************************************
    md5 类实现了RSA Data Security, Inc.在提交给IETF
    的RFC1321中的MD5 message-digest 算法。
    *************************************************/
    public class MD5 {
    /* 下面这些S11-S44实际上是一个4*4的矩阵,在原始的C实现中是用#define 实现的,
    这里把它们实现成为static final是表示了只读,切能在同一个进程空间内的多个
    Instance间共享*/
    static final int S11 = 7;
    static final int S12 = 12;
    static final int S13 = 17;
    static final int S14 = 22;
    static final int S21 = 5;
    static final int S22 = 9;
    static final int S23 = 14;
    static final int S24 = 20;
    static final int S31 = 4;
    static final int S32 = 11;
    static final int S33 = 16;
    static final int S34 = 23;
    static final int S41 = 6;
    static final int S42 = 10;
    static final int S43 = 15;
    static final int S44 = 21;
    static final byte[] PADDING = { -128, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
    /* 下面的三个成员是MD5计算过程中用到的3个核心数据,在原始的C实现中
    被定义到MD5_CTX结构中
    */
    private long[] state = new long[4]; // state (ABCD)
    private long[] count = new long[2]; // number of bits, modulo 2^64 (lsb first)
    private byte[] buffer = new byte[64]; // input buffer
    /* digestHexStr是MD5的唯一一个公共成员,是最新一次计算结果的
    16进制ASCII表示.
    */
    public String digestHexStr;
    /* digest,是最新一次计算结果的2进制内部表示,表示128bit的MD5值.
    */
    private byte[] digest = new byte[16];
    /*
    getMD5ofStr是类MD5最主要的公共方法,入口参数是你想要进行MD5变换的字符串
    返回的是变换完的结果,这个结果是从公共成员digestHexStr取得的.
    */
    public String getMD5ofStr(String inbuf) {
    md5Init();
    md5Update(inbuf.getBytes(), inbuf.length());
    md5Final();
    digestHexStr = "";
    for (int i = 0; i < 16; i++) {
    digestHexStr += byteHEX(digest[i]);
    }
    return digestHexStr;
    }
    // 这是MD5这个类的标准构造函数,JavaBean要求有一个public的并且没有参数的构造函数
    public MD5() {
    md5Init();
    return;
    }
    /* md5Init是一个初始化函数,初始化核心变量,装入标准的幻数 */
    private void md5Init() {
    count[0] = 0L;
    count[1] = 0L;
    ///* Load magic initialization constants.
    state[0] = 0x67452301L;
    state[1] = 0xefcdab89L;
    state[2] = 0x98badcfeL;
    state[3] = 0x10325476L;
    return;
    }
    /* F, G, H ,I 是4个基本的MD5函数,在原始的MD5的C实现中,由于它们是
    简单的位运算,可能出于效率的考虑把它们实现成了宏,在java中,我们把它们
    实现成了private方法,名字保持了原来C中的。 */
    private long F(long x, long y, long z) {
    return (x & y) | ((~x) & z);
    }
    private long G(long x, long y, long z) {
    return (x & z) | (y & (~z));
    }
    private long H(long x, long y, long z) {
    return x ^ y ^ z;
    }
    private long I(long x, long y, long z) {
    return y ^ (x | (~z));
    }
    /*
    Rotation is separate from addition to prevent recomputation.
    */
    private long FF(long a, long b, long c, long d, long x, long s,
    long ac) {
    a += F (b, c, d) + x + ac;
    a = ((int) a << s) | ((int) a >>> (32 - s));
    a += b;
    return a;
    }
    private long GG(long a, long b, long c, long d, long x, long s,
    long ac) {
    a += G (b, c, d) + x + ac;
    a = ((int) a << s) | ((int) a >>> (32 - s));
    a += b;
    return a;
    }
    private long HH(long a, long b, long c, long d, long x, long s,
    long ac) {
    a += H (b, c, d) + x + ac;
    a = ((int) a << s) | ((int) a >>> (32 - s));
    a += b;
    return a;
    }
    private long II(long a, long b, long c, long d, long x, long s,
    long ac) {
    a += I (b, c, d) + x + ac;
    a = ((int) a << s) | ((int) a >>> (32 - s));
    a += b;
    return a;
    }
    /*
    md5Update是MD5的主计算过程,inbuf是要变换的字节串,inputlen是长度,这个
    函数由getMD5ofStr调用,调用之前需要调用md5init,因此把它设计成private的
    */
    private void md5Update(byte[] inbuf, int inputLen) {
    int i, index, partLen;
    byte[] block = new byte[64];
    index = (int)(count[0] >>> 3) & 0x3F;
    // /* Update number of bits */
    if ((count[0] += (inputLen << 3)) < (inputLen << 3))
    count[1]++;
    count[1] += (inputLen >>> 29);
    partLen = 64 - index;
    // Transform as many times as possible.
    if (inputLen >= partLen) {
    md5Memcpy(buffer, inbuf, index, 0, partLen);
    md5Transform(buffer);
    for (i = partLen; i + 63 < inputLen; i += 64) {
    md5Memcpy(block, inbuf, 0, i, 64);
    md5Transform (block);
    }
    index = 0;
    } else
    i = 0;
    ///* Buffer remaining input */
    md5Memcpy(buffer, inbuf, index, i, inputLen - i);
    }
    /*
    md5Final整理和填写输出结果
    */
    private void md5Final () {
    byte[] bits = new byte[8];
    int index, padLen;
    ///* Save number of bits */
    Encode (bits, count, 8);
    ///* Pad out to 56 mod 64.
    index = (int)(count[0] >>> 3) & 0x3f;
    padLen = (index < 56) ? (56 - index) : (120 - index);
    md5Update (PADDING, padLen);
    ///* Append length (before padding) */
    md5Update(bits, 8);
    ///* Store state in digest */
    Encode (digest, state, 16);
    }
    /* md5Memcpy是一个内部使用的byte数组的块拷贝函数,从input的inpos开始把len长度的
    字节拷贝到output的outpos位置开始
    */
    private void md5Memcpy (byte[] output, byte[] input,
    int outpos, int inpos, int len)
    {
    int i;
    for (i = 0; i < len; i++)
    output[outpos + i] = input[inpos + i];
    }
    /*
    md5Transform是MD5核心变换程序,有md5Update调用,block是分块的原始字节
    */
    private void md5Transform (byte block[]) {
    long a = state[0], b = state[1], c = state[2], d = state[3];
    long[] x = new long[16];
    Decode (x, block, 64);

/* Round 1 */
    a = FF (a, b, c, d, x[0], S11, 0xd76aa478L); /* 1 */
    d = FF (d, a, b, c, x[1], S12, 0xe8c7b756L); /* 2 */
    c = FF (c, d, a, b, x[2], S13, 0x242070dbL); /* 3 */
    b = FF (b, c, d, a, x[3], S14, 0xc1bdceeeL); /* 4 */
    a = FF (a, b, c, d, x[4], S11, 0xf57c0fafL); /* 5 */
    d = FF (d, a, b, c, x[5], S12, 0x4787c62aL); /* 6 */
    c = FF (c, d, a, b, x[6], S13, 0xa8304613L); /* 7 */
    b = FF (b, c, d, a, x[7], S14, 0xfd469501L); /* 8 */
    a = FF (a, b, c, d, x[8], S11, 0x698098d8L); /* 9 */
    d = FF (d, a, b, c, x[9], S12, 0x8b44f7afL); /* 10 */
    c = FF (c, d, a, b, x[10], S13, 0xffff5bb1L); /* 11 */
    b = FF (b, c, d, a, x[11], S14, 0x895cd7beL); /* 12 */
    a = FF (a, b, c, d, x[12], S11, 0x6b901122L); /* 13 */
    d = FF (d, a, b, c, x[13], S12, 0xfd987193L); /* 14 */
    c = FF (c, d, a, b, x[14], S13, 0xa679438eL); /* 15 */
    b = FF (b, c, d, a, x[15], S14, 0x49b40821L); /* 16 */
    /* Round 2 */
    a = GG (a, b, c, d, x[1], S21, 0xf61e2562L); /* 17 */
    d = GG (d, a, b, c, x[6], S22, 0xc040b340L); /* 18 */
    c = GG (c, d, a, b, x[11], S23, 0x265e5a51L); /* 19 */
    b = GG (b, c, d, a, x[0], S24, 0xe9b6c7aaL); /* 20 */
    a = GG (a, b, c, d, x[5], S21, 0xd62f105dL); /* 21 */
    d = GG (d, a, b, c, x[10], S22, 0x2441453L); /* 22 */
    c = GG (c, d, a, b, x[15], S23, 0xd8a1e681L); /* 23 */
    b = GG (b, c, d, a, x[4], S24, 0xe7d3fbc8L); /* 24 */
    a = GG (a, b, c, d, x[9], S21, 0x21e1cde6L); /* 25 */
    d = GG (d, a, b, c, x[14], S22, 0xc33707d6L); /* 26 */
    c = GG (c, d, a, b, x[3], S23, 0xf4d50d87L); /* 27 */
    b = GG (b, c, d, a, x[8], S24, 0x455a14edL); /* 28 */
    a = GG (a, b, c, d, x[13], S21, 0xa9e3e905L); /* 29 */
    d = GG (d, a, b, c, x[2], S22, 0xfcefa3f8L); /* 30 */
    c = GG (c, d, a, b, x[7], S23, 0x676f02d9L); /* 31 */
    b = GG (b, c, d, a, x[12], S24, 0x8d2a4c8aL); /* 32 */
    /* Round 3 */
    a = HH (a, b, c, d, x[5], S31, 0xfffa3942L); /* 33 */
    d = HH (d, a, b, c, x[8], S32, 0x8771f681L); /* 34 */
    c = HH (c, d, a, b, x[11], S33, 0x6d9d6122L); /* 35 */
    b = HH (b, c, d, a, x[14], S34, 0xfde5380cL); /* 36 */
    a = HH (a, b, c, d, x[1], S31, 0xa4beea44L); /* 37 */
    d = HH (d, a, b, c, x[4], S32, 0x4bdecfa9L); /* 38 */
    c = HH (c, d, a, b, x[7], S33, 0xf6bb4b60L); /* 39 */
    b = HH (b, c, d, a, x[10], S34, 0xbebfbc70L); /* 40 */
    a = HH (a, b, c, d, x[13], S31, 0x289b7ec6L); /* 41 */
    d = HH (d, a, b, c, x[0], S32, 0xeaa127faL); /* 42 */
    c = HH (c, d, a, b, x[3], S33, 0xd4ef3085L); /* 43 */
    b = HH (b, c, d, a, x[6], S34, 0x4881d05L); /* 44 */
    a = HH (a, b, c, d, x[9], S31, 0xd9d4d039L); /* 45 */
    d = HH (d, a, b, c, x[12], S32, 0xe6db99e5L); /* 46 */
    c = HH (c, d, a, b, x[15], S33, 0x1fa27cf8L); /* 47 */
    b = HH (b, c, d, a, x[2], S34, 0xc4ac5665L); /* 48 */
    /* Round 4 */
    a = II (a, b, c, d, x[0], S41, 0xf4292244L); /* 49 */
    d = II (d, a, b, c, x[7], S42, 0x432aff97L); /* 50 */
    c = II (c, d, a, b, x[14], S43, 0xab9423a7L); /* 51 */
    b = II (b, c, d, a, x[5], S44, 0xfc93a039L); /* 52 */
    a = II (a, b, c, d, x[12], S41, 0x655b59c3L); /* 53 */
    d = II (d, a, b, c, x[3], S42, 0x8f0ccc92L); /* 54 */
    c = II (c, d, a, b, x[10], S43, 0xffeff47dL); /* 55 */
    b = II (b, c, d, a, x[1], S44, 0x85845dd1L); /* 56 */
    a = II (a, b, c, d, x[8], S41, 0x6fa87e4fL); /* 57 */
    d = II (d, a, b, c, x[15], S42, 0xfe2ce6e0L); /* 58 */
    c = II (c, d, a, b, x[6], S43, 0xa3014314L); /* 59 */
    b = II (b, c, d, a, x[13], S44, 0x4e0811a1L); /* 60 */
    a = II (a, b, c, d, x[4], S41, 0xf7537e82L); /* 61 */
    d = II (d, a, b, c, x[11], S42, 0xbd3af235L); /* 62 */
    c = II (c, d, a, b, x[2], S43, 0x2ad7d2bbL); /* 63 */
    b = II (b, c, d, a, x[9], S44, 0xeb86d391L); /* 64 */
    state[0] += a;
    state[1] += b;
    state[2] += c;
    state[3] += d;
    }
    /*Encode把long数组按顺序拆成byte数组,因为java的long类型是64bit的,
    只拆低32bit,以适应原始C实现的用途
    */
    private void Encode (byte[] output, long[] input, int len) {
    int i, j;
    for (i = 0, j = 0; j < len; i++, j += 4) {
    output[j] = (byte)(input[i] & 0xffL);
    output[j + 1] = (byte)((input[i] >>> 8) & 0xffL);
    output[j + 2] = (byte)((input[i] >>> 16) & 0xffL);
    output[j + 3] = (byte)((input[i] >>> 24) & 0xffL);
    }
    }
    /*Decode把byte数组按顺序合成成long数组,因为java的long类型是64bit的,
    只合成低32bit,高32bit清零,以适应原始C实现的用途
    */
    private void Decode (long[] output, byte[] input, int len) {
    int i, j;
    for (i = 0, j = 0; j < len; i++, j += 4)
    output[i] = b2iu(input[j]) |
    (b2iu(input[j + 1]) << 8) |
    (b2iu(input[j + 2]) << 16) |
    (b2iu(input[j + 3]) << 24);
    return;
    }
    /*
    b2iu是我写的一个把byte按照不考虑正负号的原则的"升位"程序,因为java没有unsigned运算
    */
    public static long b2iu(byte b) {
    return b < 0 ? b & 0x7F + 128 : b;
    }
    /*byteHEX(),用来把一个byte类型的数转换成十六进制的ASCII表示,
    因为java中的byte的toString无法实现这一点,我们又没有C语言中的
    sprintf(outbuf,"%02X",ib)
    */
    public static String byteHEX(byte ib) {
    char[] Digit = { '0','1','2','3','4','5','6','7','8','9',
    'A','B','C','D','E','F' };
    char [] ob = new char[2];
    ob[0] = Digit[(ib >>> 4) & 0X0F];
    ob[1] = Digit[ib & 0X0F];
    String s = new String(ob);
    return s;
    }
    }


[工具类] 分页split_page.jsp:

<%@ page contentType="text/html;charset=gbk"%>
<%
    // 页面连接路径
    String jspUrl = null ;
    // 定义如下分页变量
    // 1、定义没页要显示的记录数,默认是10条每页
    int lineSize = 10 ;
    // 2、定义一个当前是第几页
    int currentPage = 1 ;
    // 计算出总页数
    int pageSize = 0 ;
    // 总记录数 / 每页显示的记录数
    int allRecorders = 0 ;
    // 加入查询关键字变量
    String keyWord = null ;
    // 加入一个检索标记
    String searchFlag = "F" ;
%>
<%
    // 需要从外面接收以下参数
    // 当前页、每页显示的记录数、总记录数、查询关键字、连接地址
    jspUrl = request.getParameter("jspUrl") ;
    keyWord = request.getParameter("keyWord") ;
    searchFlag = request.getParameter("searchFlag") ;
    try
    {
        lineSize = Integer.parseInt(request.getParameter("lineSize")) ;
        currentPage = Integer.parseInt(request.getParameter("currentPage")) ;
        allRecorders = Integer.parseInt(request.getParameter("allRecorders")) ;
    }
    catch(Exception e)
    {
        // s
    }
%>
<%
    // 计算总页数
    pageSize = (allRecorders+lineSize-1)/lineSize ;
%>
<script language="javaScript">
    function openPage(curpage)
    {
        document.spage.cp.value = curpage ;
        // alert(cupage) ;
        document.spage.submit() ;
    }
    function selOpenPage()
    {
        document.spage.cp.value = document.spage.selpage.value ;
        document.spage.submit() ;
    }
    function change()
    {
        if(document.spage.kw.value!="")
        {
            document.spage.status.value = "selectlike" ;
        }
    }
</script>
<form name="spage" action="<%=jspUrl%>" onSubmit="change()">
<input type="hidden"
    name="status" value="${status}"> <input type="hidden"
    name="${param.flagname}" value=${param.flagvalue}> <%
 if ("T".equals(searchFlag)) {
 %> 输入查询关键字:<input type="text" name="kw"
    value="<%=keyWord.equals("null") ? "" : keyWord%>"> <input
    type="submit" value="查询"> <br>
<br>
<%
}
%> <%
 if (allRecorders > 0) {
 %> <input type="button" value="首页" onClick="openPage(1)"
    <%=currentPage == 1 ? "disabled" : ""%>> <input type="button"
    value="上一页" onClick="openPage(<%=currentPage - 1%>)"
    <%=currentPage == 1 ? "disabled" : ""%>> <input type="button"
    value="下一页" onClick="openPage(<%=currentPage + 1%>)"
    <%=currentPage == pageSize ? "disabled" : ""%>> <input type="button"
    value="尾页" onClick="openPage(<%=pageSize%>)"
    <%=currentPage == pageSize ? "disabled" : ""%>> <input type="hidden"
    name="cp" value=""> <font color="red" size="5"><%=currentPage%></font>
/ <font color="red" size="5"><%=pageSize%></font> 跳转到 <select
    name="selpage" onChange="selOpenPage()">
    <%
    for (int x = 1; x <= pageSize; x++) {
    %>
    <option value="<%=x%>" <%=currentPage == x ? "selected" : ""%>><%=x%></option>
    <%
    }
    %>
</select> 页 <%
}
%>
</form>

写在最后

(代码由于太多贴不全,如果有问题或者需要所有源码,可以加博主V交流: Code2Life2)

posted @ 2022-07-24 16:26  武红明  阅读(736)  评论(0编辑  收藏  举报