用mysql编译：Java Web开发实战经典（基础篇)课后题答案 060502_〖第05章：JSP基础语法〗_第02题

以下为调试通过代码，需要更详细的可以私信问我

要修改的地方：

1、mysql和oracle之间的转换：

String sql = 	"SELECT COUNT(empno) FROM emp " + 
					" WHERE empno LIKE ? OR ename LIKE ? OR job LIKE ? OR TO_CHAR(hiredate,'yyyy-mm-dd') LIKE ? " + 
					" OR sal LIKE ? OR comm LIKE ? " ;

改为

String sql = 	"SELECT COUNT(empno) FROM emp " + 
					" WHERE empno LIKE ? OR ename LIKE ? OR job LIKE ? OR DATE_FORMAT(hiredate,'yyyy-mm-dd') LIKE ? " + 
					" OR sal LIKE ? OR comm LIKE ? " ;

2、mysql和oracle之间的转换：
	

sql = 	"SELECT * FROM (	" + 
			" SELECT empno,ename,job,hiredate,sal,comm,ROWNUM rn " +
			" FROM emp WHERE (empno LIKE ? OR ename LIKE ? OR job LIKE ? OR TO_CHAR(hiredate,'yyyy-mm-dd') LIKE ? OR sal LIKE ? OR comm LIKE ?) AND " + 
			" ROWNUM<=? ORDER BY empno) temp " + 
			" WHERE temp.rn>? " ;

改为：

sql = " SELECT * FROM emp WHERE empno LIKE ? OR ename LIKE ? OR job LIKE ? OR DATE_FORMAT(hiredate,'yyyy-mm-dd') LIKE ? "+
      "OR sal LIKE ? OR comm LIKE ?  ORDER BY empno LIMIT ? , ? ";

3、

改为
 
  
 
  
 
 
  
4、数据库的连接：
 
  
public static final String DBDRIVER = "oracle.jdbc.driver.OracleDriver" ;
	public static final String DBURL = "jdbc:oracle:thin:@localhost:1521:MLDN" ;
	public static final String DBUSER = "scott" ;
	public static final String DBPASSWORD = "tiger" ;
 
  
改为：
 
  
public static final String DBDRIVER = "org.gjt.mm.mysql.Driver"; 
	public static final String DBURL = "jdbc:mysql://localhost:3306/mldn"; 
	public static final String DBUSER = "用户名"; 
	public static final String DBPASSWORD = "t密码"; 
 
  
代码如下：
 
  
emp_list.jsp
 
  
<%@ page contentType="text/html" pageEncoding="GBK"%>
<%@ page import="java.sql.*" %>




	

<%!
	public static final String URL = "emp_list.jsp" ;
%>
<%!
	public static final String DBDRIVER = "org.gjt.mm.mysql.Driver";
	public static final String DBURL = "jdbc:mysql://localhost:3306/mldn";
	public static final String DBUSER = "root";
	public static final String DBPASSWORD = "toor";
%>
<%
	Connection conn = null ;
	PreparedStatement pstmt = null ;
	ResultSet rs = null ;
%>
<%
	int currentPage = 1 ;	// 为当前所在的页，默认在第1页
	int lineSize = 3 ;		// 每次显示的记录数
	int allRecorders = 0 ;	// 表示全部的记录数
	String keyWord = request.getParameter("kw"); //接收查询关键字
%>
<%
	try{
		currentPage = Integer.parseInt(request.getParameter("cp")) ;
	} catch(Exception e) {}
	try{
		lineSize = Integer.parseInt(request.getParameter("ls")) ;
	} catch(Exception e) {}
	if(keyWord == null){
	   keyWord = "";
	}
%>
<%
	Class.forName(DBDRIVER) ;
	conn = DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD) ;
		String sql = 	"SELECT COUNT(empno) FROM emp " + 
					" WHERE empno LIKE ? OR ename LIKE ? OR job LIKE ? OR DATE_FORMAT(hiredate,'yyyy-mm-dd') LIKE ? " + 
					" OR sal LIKE ? OR comm LIKE ? " ;
	pstmt = conn.prepareStatement(sql) ;
	pstmt.setString(1,"%"+keyWord+"%") ;
	pstmt.setString(2,"%"+keyWord+"%") ;
	pstmt.setString(3,"%"+keyWord+"%") ;
	pstmt.setString(4,"%"+keyWord+"%") ;
	pstmt.setString(5,"%"+keyWord+"%") ;
	pstmt.setString(6,"%"+keyWord+"%") ;
	rs = pstmt.executeQuery() ;
	if(rs.next()){	// 取得全部的记录数
		allRecorders = rs.getInt(1) ;
	}
%>

	
雇员列表

    
    


<%
sql = " SELECT * FROM emp WHERE empno LIKE ? OR ename LIKE ? OR job LIKE ? OR DATE_FORMAT(hiredate,'yyyy-mm-dd') LIKE ? "+
      "OR sal LIKE ? OR comm LIKE ?  ORDER BY empno LIMIT ? , ? ";
pstmt = conn.prepareStatement(sql) ;
pstmt.setString(1,"%"+keyWord+"%");
pstmt.setString(2,"%"+keyWord+"%");
pstmt.setString(3,"%"+keyWord+"%");
pstmt.setString(4,"%"+keyWord+"%");
pstmt.setString(5,"%"+keyWord+"%");
pstmt.setString(6,"%"+keyWord+"%");
pstmt.setInt(7,(currentPage -1)* lineSize) ;
pstmt.setInt(8,lineSize) ;
rs = pstmt.executeQuery() ;
%>
<%
	while(rs.next()){
		int empno = rs.getInt(1) ;
		String ename = rs.getString(2) ;
		String job = rs.getString(3) ;
		Date hiredate = rs.getDate(4) ;
		double sal = rs.getDouble(5) ;
		double comm = rs.getDouble(6) ;
%>
	
<%
	}
%>

	

		
编号
		
姓名
		
职位
		
雇佣日期
		
工资
		
奖金
	

		
<%=empno%>
		
<%=ename%>
		
<%=job%>
		
<%=hiredate%>
		
<%=sal%>
		
<%=comm%>
	
<%
	conn.close() ;
%>


 
  
split_page_plugin.jsp
 
  
<%@ page contentType="text/html" pageEncoding="GBK"%>
<%
	int currentPage = 1 ;	// 为当前所在的页，默认在第1页
	int lineSize = 3 ;		// 每次显示的记录数
	long allRecorders = 0 ;	// 表示全部的记录数
	long pageSize = 1 ;		// 表示全部的页数（尾页）
	int lsData[] = {1,3,5,7,9,10,15,20,25,30,50,100} ;
	String keyWord = request.getParameter("kw"); //接收查询关键字
	String url = request.getParameter("url");
%>
<%
	try{
		currentPage = Integer.parseInt(request.getParameter("cp")) ;
	} catch(Exception e) {}
	try{
		lineSize = Integer.parseInt(request.getParameter("ls")) ;
	} catch(Exception e) {}
	try{
		allRecorders = Long.parseLong(request.getParameter("allRecorders")) ;
	} catch(Exception e) {}
	if(keyWord == null){
	   keyWord = "";
	}
%>

<%
	pageSize = (allRecorders + lineSize -1) / lineSize ;
	if(pageSize == 0){
	   pageSize = 1;
	}
%>


    输入查询关键字：

	>
	>
	>
	>
	跳转到第
		<%
			for(int x=1;x<=pageSize;x++){
		%>
				><%=x%>
		<%
			}
		%>
	页
	每页显示
		
		<%
			for(int x=0;x
			><%=lsData[x]%>
		<%
			}
		%>
		
	条