分页类和页面，(MYSQL,其他数据库需更改SQL)
2004-09-17 16:56
465 查看
类DataList
/*
* Created on 2004-9-17
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package com.jia.database;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.logging.Logger;
/**
* @author Administrator
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class DataList {
private static String sql_teacher_count = "select count(*) from teacher";
private static ArrayList arr_teacher = new ArrayList();
private static int totalCount = 0;
/*取出总纪录数*/
public static int getTeacherCount() {
Connection conn = ConnectDB.ConnMysqlbyJDBC();
Statement stmt = null;
try {
stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql_teacher_count);
totalCount = rs.getInt(1);
} catch (SQLException e) {
Logger log = Logger.getLogger("");
log.severe("取出表数据错误" + e.getMessage());
// TODO: handle exception
} finally {
try {
stmt.close();
conn.close();
} catch (Exception e) {
}
}
return totalCount;
}
/*取出分页纪录*/
public static ArrayList getTeacherList(int p1, int p2) {
Connection conn = ConnectDB.ConnMysqlbyJDBC();
Statement stmt = null;
try {
arr_teacher.clear();
stmt = conn.createStatement();
ResultSet rs =
stmt.executeQuery(
"SELECT id,name,address FROM teacher limit "
+ p1
+ ","
+ p2
+ "");
while (rs.next()) {
Teacher teacher = new Teacher();
teacher.setId(rs.getString(1));
teacher.setName(rs.getString(2));
teacher.setAddress(rs.getString(3));
arr_teacher.add(teacher);
}
} catch (SQLException e) {
// TODO: handle exception
Logger log = Logger.getLogger("");
log.severe("取出表数据错误" + e.getMessage());
} finally {
try {
stmt.close();
conn.close();
} catch (Exception e) {
}
}
return arr_teacher;
}
}
标准javaBean,teacher表
/*
* Created on 2004-9-17
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package com.jia.database;
/**
* @author Administrator
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class Teacher {
private String name="";
private String address="";
private String id="";
/**
* @return
*/
public String getAddress() {
return address;
}
/**
* @return
*/
public String getName() {
return name;
}
/**
* @param string
*/
public void setAddress(String string) {
address = string;
}
/**
* @param string
*/
public void setName(String string) {
name = string;
}
/**
* @return
*/
public String getId() {
return id;
}
/**
* @param string
*/
public void setId(String string) {
id = string;
}
}
显示页面default.jsp
<%@ page language="java" errorPage="error.html" pageEncoding="GB2312" %>
<%@ page import="java.util.*"%>
<%@ page import="com.jia.database.Teacher"%>
<%@ page import="com.jia.database.DataList"%>
<!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<title>Lomboz JSP</title>
<link href="/WebStation/css/style.css" rel="stylesheet" type="text/css">
</head>
<body bgcolor="#FFFFFF">
<!---------------------可抽取为单独的jsf文件---------------------------->
<%
int rowNum=DataList.getTeacherCount();
int pageSize=5;
int pageNum=rowNum%pageSize==0?(rowNum/pageSize) : (rowNum/pageSize+1);
int curPage=1;
if(request.getParameter("curPage")!=null)
curPage=Integer.parseInt(request.getParameter("curPage"));
%>
<!---------------------------------------------------------------------->
<%
ArrayList al=DataList.getTeacherList((curPage-1)*pageSize,pageSize);
Teacher teacher=new Teacher();
Iterator it =al.listIterator();
while (it.hasNext()) {
teacher=(Teacher)it.next();
out.println(teacher.getId()+teacher.getName()+teacher.getAddress()+"<br>");
}
%>
<!---------------------可抽取为单独的jsf文件---------------------------->
共<%=pageNum%>页 第<%=curPage%>页
<%if(curPage-1>0){%>
<a href="default.jsp?curPage=<%=curPage-1%>"><<<<</a>
<%}%>
<%if(curPage+1<=pageNum){%>
<a href="default.jsp?curPage=<%=curPage+1%>">>>>></a>
<%}%>
<!---------------------------------------------------------------------->
<form method="post" action="/WebStation/LoginServlet">
<center>
用户：<input type="text" name="userName">
密码：<input type="text" name="password">
验证码：<input type="text" name="veritycode" size=4 maxlength=4><script>document.write("<img border=0 src='/WebStation/verifyImg'>");</script>
<input type="submit" value="登陆">
</center>
</form>
</body>
</html>
/*
* Created on 2004-9-17
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package com.jia.database;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.logging.Logger;
/**
* @author Administrator
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class DataList {
private static String sql_teacher_count = "select count(*) from teacher";
private static ArrayList arr_teacher = new ArrayList();
private static int totalCount = 0;
/*取出总纪录数*/
public static int getTeacherCount() {
Connection conn = ConnectDB.ConnMysqlbyJDBC();
Statement stmt = null;
try {
stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery(sql_teacher_count);
totalCount = rs.getInt(1);
} catch (SQLException e) {
Logger log = Logger.getLogger("");
log.severe("取出表数据错误" + e.getMessage());
// TODO: handle exception
} finally {
try {
stmt.close();
conn.close();
} catch (Exception e) {
}
}
return totalCount;
}
/*取出分页纪录*/
public static ArrayList getTeacherList(int p1, int p2) {
Connection conn = ConnectDB.ConnMysqlbyJDBC();
Statement stmt = null;
try {
arr_teacher.clear();
stmt = conn.createStatement();
ResultSet rs =
stmt.executeQuery(
"SELECT id,name,address FROM teacher limit "
+ p1
+ ","
+ p2
+ "");
while (rs.next()) {
Teacher teacher = new Teacher();
teacher.setId(rs.getString(1));
teacher.setName(rs.getString(2));
teacher.setAddress(rs.getString(3));
arr_teacher.add(teacher);
}
} catch (SQLException e) {
// TODO: handle exception
Logger log = Logger.getLogger("");
log.severe("取出表数据错误" + e.getMessage());
} finally {
try {
stmt.close();
conn.close();
} catch (Exception e) {
}
}
return arr_teacher;
}
}
标准javaBean,teacher表
/*
* Created on 2004-9-17
*
* To change the template for this generated file go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
package com.jia.database;
/**
* @author Administrator
*
* To change the template for this generated type comment go to
* Window>Preferences>Java>Code Generation>Code and Comments
*/
public class Teacher {
private String name="";
private String address="";
private String id="";
/**
* @return
*/
public String getAddress() {
return address;
}
/**
* @return
*/
public String getName() {
return name;
}
/**
* @param string
*/
public void setAddress(String string) {
address = string;
}
/**
* @param string
*/
public void setName(String string) {
name = string;
}
/**
* @return
*/
public String getId() {
return id;
}
/**
* @param string
*/
public void setId(String string) {
id = string;
}
}
显示页面default.jsp
<%@ page language="java" errorPage="error.html" pageEncoding="GB2312" %>
<%@ page import="java.util.*"%>
<%@ page import="com.jia.database.Teacher"%>
<%@ page import="com.jia.database.DataList"%>
<!DOCTYPE HTML PUBLIC "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<title>Lomboz JSP</title>
<link href="/WebStation/css/style.css" rel="stylesheet" type="text/css">
</head>
<body bgcolor="#FFFFFF">
<!---------------------可抽取为单独的jsf文件---------------------------->
<%
int rowNum=DataList.getTeacherCount();
int pageSize=5;
int pageNum=rowNum%pageSize==0?(rowNum/pageSize) : (rowNum/pageSize+1);
int curPage=1;
if(request.getParameter("curPage")!=null)
curPage=Integer.parseInt(request.getParameter("curPage"));
%>
<!---------------------------------------------------------------------->
<%
ArrayList al=DataList.getTeacherList((curPage-1)*pageSize,pageSize);
Teacher teacher=new Teacher();
Iterator it =al.listIterator();
while (it.hasNext()) {
teacher=(Teacher)it.next();
out.println(teacher.getId()+teacher.getName()+teacher.getAddress()+"<br>");
}
%>
<!---------------------可抽取为单独的jsf文件---------------------------->
共<%=pageNum%>页 第<%=curPage%>页
<%if(curPage-1>0){%>
<a href="default.jsp?curPage=<%=curPage-1%>"><<<<</a>
<%}%>
<%if(curPage+1<=pageNum){%>
<a href="default.jsp?curPage=<%=curPage+1%>">>>>></a>
<%}%>
<!---------------------------------------------------------------------->
<form method="post" action="/WebStation/LoginServlet">
<center>
用户：<input type="text" name="userName">
密码：<input type="text" name="password">
验证码：<input type="text" name="veritycode" size=4 maxlength=4><script>document.write("<img border=0 src='/WebStation/verifyImg'>");</script>
<input type="submit" value="登陆">
</center>
</form>
</body>
</html>
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