CRUD练习

以Oracle中自带的emp表进行处理，对添加雇员页面进行简单的javaScript验证处理，对分页进行控制端与显示端的分离，添加模糊查找功能。

1,添加雇员页面,AddEmp.jsp

View Code

<%@ page contentType="text/html" pageEncoding="GBK"%>
<script language="javascript">
    function validateEmpno(eno)
    {
        if(!(/^\d{4}$/.test(eno)))
        {
            document.getElementById("empno_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">雇员编号必须是四位数字！</font>"
            return false;                                                                                                        
        }
        else
        {
            document.getElementById("empno_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">雇员编号输入正确！</font>"
            return true;
        }
    }
    function validateEname(ename)
    {
        if(ename=="")
        {
            document.getElementById("ename_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">雇员姓名不能为空！</font>"
            return false;                                                                                                        
        }
        else
        {
            document.getElementById("ename_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">雇员姓名输入正确！</font>"
            return true;
        }
    }
    function validateJob(job)
    {
        if(job=="")
        {
            document.getElementById("job_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">雇员岗位不能为空！</font>"
            return false;                                                                                                        
        }
        else
        {
            document.getElementById("job_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">雇员岗位输入正确！</font>"
            return true;
        }
    }
    function validateMgr(mgr)
    {
        if(!(/^\d{4}$/.test(mgr)))
        {
            document.getElementById("mgr_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">领导编号必须是四位数字！</font>"
            return false;                                                                                                        
        }
        else
        {
            document.getElementById("mgr_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">领导编号输入正确！</font>"
            return true;
        }
    }
    function validateHiredate(hiredate)
    {
        if(!(/^\d{4}-\d{2}-\d{2}$/.test(hiredate)))    
        {
            document.getElementById("hiredate_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">雇佣日期必须是yyyy-mm-dd格式的日期！</font>"
            return false;                                                                                                        
        }
        else
        {
            document.getElementById("hiredate_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">雇佣日期输入正确！</font>"
            return true;
        }
    }
    function validateSal(sal)
    {
        if(!(/^\d+.\d*$/.test(sal)))
        {
            document.getElementById("sal_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">工资必须是数字,可以包含小数！</font>"
            return false;                                                                                                        
        }
        else
        {
            document.getElementById("sal_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">工资输入正确！</font>"
            return true;
        }
    }
    function validateComm(comm)
    {
        if(!(/^\d+.?\d*$/.test(comm)))        
        {
            document.getElementById("comm_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">奖金必须是数字,可以包含小数！</font>"
            return false;                                                                                                        
        }
        else
        {
            document.getElementById("comm_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">奖金输入正确！</font>"
            return true;
        }
    }
    function validateDeptno(deptno)
    {
        if(!(/^\d{2}$/.test(deptno)))
        {
            document.getElementById("deptno_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">部门编号必须是两位数字！</font>"
            return false;                                                                                                        
        }
        else
        {
            document.getElementById("deptno_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">部门编号输入正确！</font>"
            return true;
        }
    }
    function validate(numValue)
    {
        return validateEmpno(numValue.empno.value)&&
                     validateEname(numValue.ename.value)&&
                     validateJob(numValue.job.value)&&
                     validateMgr(numValue.mgr.value)&&
                     validateHiredate(numValue.hiredate.value)&&
                     validateSal(numValue.sal.value)&&
                     validateComm(numValue.comm.value)
                     &&validateDeptno(numValue.deptno.value);
    }
</script>
    
<h1>添加雇员信息</h1>
<form action="AddEmp_do.jsp" method="post" onSubmit="return validate(this.value)" >
            <table border="1" ,width="100%">    
                <tr>
                    <td>雇员编号:</td>
                    <td><input type="text" name="empno" onBlur="validateEmpno(this.value)" /></td>
                    <td><span id="empno_picMsg"><font color="red">*</font></span></td>
                </tr>
                <tr>
                    <td>雇员姓名:</td>
                    <td><input type="text" name="ename" onBlur="validateEname(this.value)"/></td>
                    <td><span id="ename_picMsg"><font color="red">*</font></span></td>
                </tr>
                <tr>
                    <td>雇员岗位:</td>
                    <td><input type="text" name="job" onBlur="validateJob(this.value)"/></td>
                    <td><span id="job_picMsg"><font color="red">*</font></span></td>
                </tr>
                <tr>
                    <td>领导编号:</td>
                    <td><input type="text" name="mgr" onBlur="validateMgr(this.value)"/></td>
                    <td><span id="mgr_picMsg"><font color="red">*</font></span></td>
                </tr>
                <tr>
                    <td>雇佣日期:</td>
                    <td><input type="text" name="hiredate" onBlur="validateHiredate(this.value)"/></td>
                    <td><span id="hiredate_picMsg"><font color="red">*</font></span></td>
                </tr>
                <tr>
                    <td>雇员工资:</td>
                    <td><input type="text" name="sal" onBlur="validateSal(this.value)"/></td>
                    <td><span id="sal_picMsg"><font color="red">*</font></span></td>
                </tr>
                <tr>
                    <td>雇员奖金:</td>
                    <td><input type="text" name="comm" onBlur="validateComm(this.value)"/></td>
                    <td><span id="comm_picMsg"><font color="red">*</font></span></td>
                </tr>
                <tr>
                    <td>部门编号:</td>
                    <td><input type="text" name="deptno" onBlur="validateDeptno(this.value)"/></td>
                    <td><span id="deptno_picMsg"><font color="red">*</font></span></td>
                </tr>
                <tr>
                    <input type="hidden" name="cp" value="<%=request.getParameter("cp")%>"/>
                    <input type="hidden" name="ls" value="<%=request.getParameter("ls")%>"/>
                    <td>&nbsp;&nbsp;&nbsp;&nbsp;<input type="submit" value="添加"/>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type="reset" value="重置"/></td>
                </tr>
            </table>
</form>

2，添加雇员的后台处理页面,AddEmp_do.jsp

View Code

 1 <%@ page contentType="text/html" pageEncoding="GBK"%>
 2 <%@ page import="java.sql.*,java.text.*"%>
 3 <%
 4     request.setCharacterEncoding("GBK");
 5 %>
 6 <%
 7 int empno=Integer.parseInt(request.getParameter("empno"));
 8 String ename=request.getParameter("ename");
 9 String job=request.getParameter("job");
10 int mgr=Integer.parseInt(request.getParameter("mgr"));
11     java.sql.Date hiredate=null;
12     try
13     {
14         hiredate=new java.sql.Date(new SimpleDateFormat("yyyy-MM-dd").parse(request.getParameter("hiredate")).getTime());
15     }
16     catch(Exception ex)
17     {
18         
19     }
20     float sal=Float.parseFloat(request.getParameter("sal"));
21     float comm=Float.parseFloat(request.getParameter("comm"));
22 int deptnp=Integer.parseInt(request.getParameter("deptno"));
23 %>
24 <%
25 String DBDRIVER = "oracle.jdbc.driver.OracleDriver" ;
26 String DBURL = "jdbc:oracle:thin:@localhost:1521:study" ;
27 String DBUSER = "scott" ;
28 String DBPASSWORD = "tiger" ;
29 %>
30 <%
31     Connection conn=null;
32     PreparedStatement psmt=null;
33     ResultSet rst=null;
34 %>
35 
36 <%
37 String msg="雇员添加失败!";
38     Class.forName(DBDRIVER);
39     conn=DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD);    
40 String sql="insert into emp(empno,ename,job,mgr,hiredate,sal,comm,deptno) values(?,?,?,?,?,?,?,?)";
41     psmt=conn.prepareStatement(sql);
42     psmt.setInt(1,empno);
43     psmt.setString(2,ename);
44     psmt.setString(3,job);
45     psmt.setInt(4,mgr);
46     psmt.setDate(5,hiredate);
47     psmt.setFloat(6,sal);
48     psmt.setFloat(7,comm);
49     psmt.setInt(8,deptnp);
50     try
51     {
52 int n=psmt.executeUpdate();
53 if(n>0)
54         {
55             msg="雇员添加成功!";
56         }
57     }
58     catch(Exception ex)
59     {        
60         ex.printStackTrace();
61     }
62     
63 %>
64 <script language="javascript">
65     alert("<%=msg%>");
66     window.location="fuck_page_source.jsp?cp=<%=request.getParameter("cp")%>&ls=<%=request.getParameter("ls")%>";
67 </script>

3,分页的控制端页面,fuck_page_control.jsp

View Code

 1 <%@ page contentType="text/html" pageEncoding="GBK"%>
 2 <%
 3 int currentPage =1;
 4 int lineSize=3;
 5 long allRecorders=0;
 6 long pageSize=1;
 7 int[] lineData={1,3,5,7,9,10,12,14};
 8 String keyword=null;    
 9 String url=request.getParameter("url");    
10 %>
11 <%
12         try
13         {
14             allRecorders=Long.parseLong(request.getParameter("Recorders"));
15         }
16         catch(Exception ex)
17         {
18             ex.printStackTrace();
19         }
20         try
21         {            
22             currentPage=Integer.parseInt(request.getParameter("cp"));
23             lineSize=Integer.parseInt(request.getParameter("ls"));                
24             keyword=request.getParameter("kw");            
25         }
26         catch(Exception ex)
27         {            
28         }
29 if(keyword==null)
30         {
31             keyword="";
32         }
33     pageSize = (allRecorders + lineSize -1) / lineSize ;    
34     
35 if(pageSize == 0)
36     {
37         pageSize = 1 ;
38     }
39 %>
40 
41 <center>
42     <h1>雇员信息列表</h1><br/>
43     <a href="AddEmp.jsp?cp=<%=currentPage%>&ls=<%=lineSize%>"> 添加雇员</a>
44     <script language="javascript">
45 function go(num)
46             {
47                 document.getElementById("cp").value=num;
48                 document.pageForm.submit();
49             }
50 </script>
51     <form name="pageForm" action="<%=url%>" method="post">
52     请输入查询关键字:<input type="text" name="kw" value="<%=keyword%>"/> <input type="submit" value="查询"/><br/><br/>
53         <input type="button" value="首页" onClick="go(1)" <%=currentPage==1?"disabled":""%>/>
54         <input type="button" value="上一页" onclick="go(<%=currentPage-1%>)" <%=currentPage==1?"disabled":""%>/>
55         <input type="button" value="下一页" onclick="go(<%=currentPage+1%>)" <%=currentPage==pageSize?"disabled":""%>/>
56         <input type="button" value="尾页" onclick="go(<%=pageSize%>)" <%=currentPage==pageSize?"disabled":""%>/>
57         跳转至<select onChange="go(this.value)">
58 <%for(int i=1;i<=pageSize;i++)
59                 {
60 %>
61         <option value=<%=i%> <%=i==currentPage?"selected":""%>><%=i%></option>    
62 <%                
63                 }
64 %>
65         </select>
66         页    
67         每页显示<select  name="ls" onChange="go(1)">
68 <%for(int i=0;i<lineData.length;i++)
69                 {
70 %>
71         <option value=<%=lineData[i]%> <%=lineSize==lineData[i]?"selected":""%>><%=lineData[i]%></option>    
72 <%                
73                 }
74 %>
75         </select>
76         条记录
77         <input type="hidden" value="1" name="cp" />        
78     </form>    
79 </center>

4,分页的显示页面,fuck_page_source.jsp

View Code

  1 <%@ page contentType="text/html" pageEncoding="GBK"%>
  2 <%@ page import="java.sql.*"%>
  3 <%
  4     request.setCharacterEncoding("GBK");
  5 String url="fuck_page_source.jsp";
  6 %>
  7 <%
  8 int currentPage =1;
  9 int lineSize=3;
 10 int allRecorders=0;
 11 String keyword=null;    
 12 int count=0;
 13 %>
 14 <%
 15         try
 16         {
 17             currentPage=Integer.parseInt(request.getParameter("cp"));
 18             lineSize=Integer.parseInt(request.getParameter("ls"));
 19             keyword=request.getParameter("kw");
 20         }
 21         catch(Exception ex)
 22         {            
 23         }
 24 if(keyword==null)
 25         {
 26             keyword="";
 27         }
 28 %>
 29 <%
 30 String DBDRIVER = "oracle.jdbc.driver.OracleDriver" ;
 31 String DBURL = "jdbc:oracle:thin:@localhost:1521:study" ;
 32 String DBUSER = "scott" ;
 33 String DBPASSWORD = "tiger" ;
 34 %>
 35 <%
 36     Connection conn=null;
 37     PreparedStatement psmt=null;
 38     ResultSet rst=null;
 39 %>
 40 
 41 <%
 42     Class.forName(DBDRIVER);
 43     conn=DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD);    
 44 String sql="select count(empno) from emp where empno like ? or ename like ? or job like ? or mgr like ? or to_char(hiredate,'yyyy-mm-dd') like ? or sal like ? or comm like ? or deptno like ?";
 45     psmt=conn.prepareStatement(sql);
 46     psmt.setString(1,"%"+keyword+"%");
 47     psmt.setString(2,"%"+keyword+"%");
 48     psmt.setString(3,"%"+keyword+"%");
 49     psmt.setString(4,"%"+keyword+"%");
 50     psmt.setString(5,"%"+keyword+"%");
 51     psmt.setString(6,"%"+keyword+"%");
 52     psmt.setString(7,"%"+keyword+"%");
 53     psmt.setString(8,"%"+keyword+"%");
 54     try
 55     {
 56         rst=psmt.executeQuery();
 57 if(rst.next())
 58         {
 59             allRecorders=rst.getInt(1);
 60         }
 61     }
 62     catch(Exception ex)
 63     {
 64         ex.printStackTrace();
 65     }
 66 
 67 %>
 68 
 69 <center>
 70     <jsp:include page="fuck_page_control.jsp">
 71         <jsp:param name="url" value="<%=url%>" />
 72         <jsp:param name="Recorders" value="<%=allRecorders%>" />
 73     </jsp:include>    
 74 </center>
 75 
 76 <table border="1" width="100%">
 77         <tr>
 78             <th>雇员编号</th>
 79             <th>雇员姓名</th>
 80             <th>雇员职位</th>
 81             <th>领导姓名</th>
 82             <th>雇佣日期</th>
 83             <th>雇员工资</th>
 84             <th>雇员奖金</th>
 85             <th>部门编号</th>
 86             <th colspan="2">操作</th>
 87         </tr>
 88 
 89 <%    
 90     try
 91     {
 92         sql="select * from (SELECT empno,ename,job,mgr,hiredate,sal,comm,deptno,ROWNUM rn FROM emp WHERE (empno like ? or ename like ? or job like ? or mgr like ? or to_char(hiredate,'yyyy-mm-dd') like ? or sal like ? or comm like ? or deptno like ?) and ROWNUM<=? ORDER BY empno) temp where temp.rn>?"; 
 93         psmt=conn.prepareStatement(sql);
 94         psmt.setString(1,"%"+keyword+"%");
 95         psmt.setString(2,"%"+keyword+"%");
 96         psmt.setString(3,"%"+keyword+"%");
 97         psmt.setString(4,"%"+keyword+"%");
 98         psmt.setString(5,"%"+keyword+"%");
 99         psmt.setString(6,"%"+keyword+"%");
100         psmt.setString(7,"%"+keyword+"%");
101         psmt.setString(8,"%"+keyword+"%");
102         psmt.setInt(9,currentPage*lineSize);
103         psmt.setInt(10,(currentPage-1)*lineSize);
104         rst=psmt.executeQuery();
105 while(rst.next())
106         {
107             count++;
108 int empno=rst.getInt(1);
109 String ename=rst.getString(2);
110 String job=rst.getString(3);
111 String mgr=rst.getString(4);
112 Date hiredate=rst.getDate(5);
113             float sal=rst.getFloat(6);
114             float comm=rst.getFloat(7);
115 int deptno=rst.getInt(8);
116 %>
117         <tr>
118             <th><%=empno%></th>
119             <th><%=ename%></th>
120             <th><%=job%></th>
121             <th><%=mgr%></th>
122             <th><%=hiredate%></th>
123             <th><%=sal%></th>
124             <th><%=comm%></th>
125             <th><%=deptno%></th>
126             <th><a href="UpdateEmp.jsp?empno=<%=empno%>&cp=<%=currentPage%>&ls=<%=lineSize%>">修改</a></th>
127             <th><a href="DeleteEmp.jsp?empno=<%=empno%>&cp=<%=currentPage%>&ls=<%=lineSize%>">删除</a></th>
128         </tr>
129 <%
130         }
131 
132     }
133     catch(Exception ex)
134     {
135         ex.printStackTrace();
136     }
137     finally
138     {
139         try
140         {
141             conn.close();
142         }
143         catch(Exception ex)
144         {
145             ex.printStackTrace();
146         }
147     }
148 %>
149 <%
150 if(count==0)
151     {
152 %>
153     <tr>
154         <th colspan="8" >没有符合条件的数据!</th>
155     </tr>
156 <%
157     }
158 %>
159     </table>

5,更新雇员信息页面，UpdateEmp.jsp

<%@ page contentType="text/html" pageEncoding="GBK"%>
<%@ page import="java.sql.*"%>
<%
	request.setCharacterEncoding("GBK");
%>
<script language="javascript">
	function validateEname(ename)
	{
		if(ename=="")
		{
			document.getElementById("ename_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">雇员姓名不能为空！</font>"
			return false;																										
		}
		else
		{
			document.getElementById("ename_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">雇员姓名输入正确！</font>"
			return true;
		}
	}
	function validateJob(job)
	{
		if(job=="")
		{
			document.getElementById("job_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">雇员岗位不能为空！</font>"
			return false;																										
		}
		else
		{
			document.getElementById("job_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">雇员岗位输入正确！</font>"
			return true;
		}
	}
	function validateMgr(mgr)
	{
		if(!(/^\d{4}$/.test(mgr)))
		{
			document.getElementById("mgr_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">领导编号必须是四位数字！</font>"
			return false;																										
		}
		else
		{
			document.getElementById("mgr_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">领导编号输入正确！</font>"
			return true;
		}
	}
	function validateHiredate(hiredate)
	{
		if(!(/^\d{4}-\d{2}-\d{2}$/.test(hiredate)))	
		{
			document.getElementById("hiredate_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">雇佣日期必须是yyyy-mm-dd格式的日期！</font>"
			return false;																										
		}
		else
		{
			document.getElementById("hiredate_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">雇佣日期输入正确！</font>"
			return true;
		}
	}
	function validateSal(sal)
	{
		if(!(/^\d+.\d*$/.test(sal)))
		{
			document.getElementById("sal_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">工资必须是数字,可以包含小数！</font>"
			return false;																										
		}
		else
		{
			document.getElementById("sal_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">工资输入正确！</font>"
			return true;
		}
	}
	function validateComm(comm)
	{
		if(!(/^\d+.?\d*$/.test(comm)))		
		{
			document.getElementById("comm_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">奖金必须是数字,可以包含小数！</font>"
			return false;																										
		}
		else
		{
			document.getElementById("comm_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">奖金输入正确！</font>"
			return true;
		}
	}
	function validateDeptno(deptno)
	{
		if(!(/^\d{2}$/.test(deptno)))
		{
			document.getElementById("deptno_picMsg").innerHTML="<img src=\"images/wrong.gif\">"+"<font color=\"red\">部门编号必须是两位数字！</font>"
			return false;																										
		}
		else
		{
			document.getElementById("deptno_picMsg").innerHTML="<img src=\"images/right.gif\">"+"<font color=\"green\">部门编号输入正确！</font>"
			return true;
		}
	}
	function validate(numValue)
	{
		return validateEname(numValue.ename.value)&&
					 validateJob(numValue.job.value)&&
					 validateMgr(numValue.mgr.value)&&
					 validateHiredate(numValue.hiredate.value)&&
					 validateSal(numValue.sal.value)&&
					 validateComm(numValue.comm.value)
					 &&validateDeptno(numValue.deptno.value);
	}
</script>
<%
	int empno=0;
	try
	{
		empno=Integer.parseInt(request.getParameter("empno"));
	}
	catch(Exception ex)
	{
	}
%>
<%
	String DBDRIVER = "oracle.jdbc.driver.OracleDriver" ;
	String DBURL = "jdbc:oracle:thin:@localhost:1521:study" ;
	String DBUSER = "scott" ;
	String DBPASSWORD = "tiger" ;
	
	String ename=null;;
	String job=null;
	int mgr=0;
	Date hiredate=null;
	float sal=0;
	float comm=0;
	int deptno=0;
%>
<%
	Connection conn=null;
	PreparedStatement psmt=null;
	ResultSet rst=null;
%>

<%
	Class.forName(DBDRIVER);
	conn=DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD);	
	String sql="select empno,ename,job,mgr,hiredate,sal,comm,deptno from emp where empno=?";
	psmt=conn.prepareStatement(sql);
	psmt.setInt(1,empno);
	try
	{
		rst=psmt.executeQuery();
		if(rst.next())
		{
			empno=rst.getInt(1);
			ename=rst.getString(2);
			job=rst.getString(3);
			mgr=rst.getInt(4);
			hiredate=rst.getDate(5);
			sal=rst.getFloat(6);
			comm=rst.getFloat(7);
			deptno=rst.getInt(8);
%>	
<h1>修改雇员信息</h1>
<form action="UpdateEmp_do.jsp" method="post" onSubmit="return validate(this.value)" >
			<table border="1" ,width="100%">	
				<tr>
					<td>雇员编号:</td>
					<td><input type="text" name="empno" value="<%=empno%>" readOnly="true"/></td>					
				</tr>
				<tr>
					<td>雇员姓名:</td>
					<td><input type="text" name="ename" onBlur="validateEname(this.value)" value="<%=ename%>"/></td>
					<td><span id="ename_picMsg"><font color="red">*</font></span></td>
				</tr>
				<tr>
					<td>雇员岗位:</td>
					<td><input type="text" name="job" onBlur="validateJob(this.value)" value="<%=job%>"/></td>
					<td><span id="job_picMsg"><font color="red">*</font></span></td>
				</tr>
				<tr>
					<td>领导编号:</td>
					<td><input type="text" name="mgr" onBlur="validateMgr(this.value)" value="<%=mgr%>"/></td>
					<td><span id="mgr_picMsg"><font color="red">*</font></span></td>
				</tr>
				<tr>
					<td>雇佣日期:</td>
					<td><input type="text" name="hiredate" onBlur="validateHiredate(this.value)" value="<%=hiredate%>"/></td>
					<td><span id="hiredate_picMsg"><font color="red">*</font></span></td>
				</tr>
				<tr>
					<td>雇员工资:</td>
					<td><input type="text" name="sal" onBlur="validateSal(this.value)" value="<%=sal%>"/></td>
					<td><span id="sal_picMsg"><font color="red">*</font></span></td>
				</tr>
				<tr>
					<td>雇员奖金:</td>
					<td><input type="text" name="comm" onBlur="validateComm(this.value)" value="<%=comm%>"/></td>
					<td><span id="comm_picMsg"><font color="red">*</font></span></td>
				</tr>
				<tr>
					<td>部门编号:</td>
					<td><input type="text" name="deptno" onBlur="validateDeptno(this.value)" value="<%=deptno%>"/></td>
					<td><span id="deptno_picMsg"><font color="red">*</font></span></td>
				</tr>
				<tr>
					<input type="hidden" name="cp" value="<%=request.getParameter("cp")%>"/>
					<input type="hidden" name="ls" value="<%=request.getParameter("ls")%>"/>
					<td>    <input type="submit" value="修改"/>          <input type="reset" value="重置"/></td>
				</tr>
			</table>
</form>
<%
			}
	}
	catch(Exception ex)
	{
		ex.printStackTrace();
	}
	finally
	{
		try
		{
			conn.close();
		}
		catch(Exception ex)
		{
			ex.printStackTrace();
		}
	}
%>

5,更新雇员后台处理页面，UpdateEmp_do.jsp

View Code

 1 <%@ page contentType="text/html" pageEncoding="GBK"%>
 2 <%@ page import="java.sql.*,java.text.*"%>
 3 <%
 4     request.setCharacterEncoding("GBK");
 5 %>
 6 <%
 7 int empno=0;
 8     try
 9     {
10         empno=Integer.parseInt(request.getParameter("empno"));
11     }
12     catch(Exception ex)
13     {
14         
15     }    
16 String ename=request.getParameter("ename");
17 String job=request.getParameter("job");
18 int mgr=Integer.parseInt(request.getParameter("mgr"));
19     java.sql.Date hiredate=null;
20     try
21     {
22         hiredate=new java.sql.Date(new SimpleDateFormat("yyyy-MM-dd").parse(request.getParameter("hiredate")).getTime());
23     }
24     catch(Exception ex)
25     {
26         
27     }
28     float sal=Float.parseFloat(request.getParameter("sal"));
29     float comm=Float.parseFloat(request.getParameter("comm"));
30 int deptno=Integer.parseInt(request.getParameter("deptno"));
31 %>
32 <%
33 String DBDRIVER = "oracle.jdbc.driver.OracleDriver" ;
34 String DBURL = "jdbc:oracle:thin:@localhost:1521:study" ;
35 String DBUSER = "scott" ;
36 String DBPASSWORD = "tiger" ;
37 %>
38 <%
39     Connection conn=null;
40     PreparedStatement psmt=null;
41     ResultSet rst=null;
42 %>
43 
44 <%
45 String msg="雇员修改失败!";
46     Class.forName(DBDRIVER);
47     conn=DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD);    
48 String sql="UPDATE emp SET ename=?,job=?,mgr=?,hiredate=?,sal=?,comm=?,deptno=? WHERE empno=?";                 
49     psmt=conn.prepareStatement(sql);
50     psmt.setString(1,ename);
51     psmt.setString(2,job);
52     psmt.setInt(3,mgr);
53     psmt.setDate(4,hiredate);
54     psmt.setFloat(5,sal);
55     psmt.setFloat(6,comm);
56     psmt.setInt(7,deptno);
57     psmt.setInt(8,empno);
58     try
59     {
60 int n=psmt.executeUpdate();
61 if(n>0)
62         {
63             msg="雇员修改成功!";
64         }
65     }
66     catch(Exception ex)
67     {        
68         ex.printStackTrace();
69     }
70     finally
71     {
72         try
73         {
74             conn.close();
75         }
76         catch(Exception ex)
77         {
78             ex.printStackTrace();
79         }
80     }
81     
82 %>
83 <script language="javascript">
84     alert("<%=msg%>");
85     window.location="fuck_page_source.jsp?cp=<%=request.getParameter("cp")%>&ls=<%=request.getParameter("ls")%>";
86 </script>

6,删除雇员页面,DeleteEmp.jsp

View Code

 1 <%@ page contentType="text/html" pageEncoding="GBK"%>
 2 <%@ page import="java.sql.*"%>
 3 <%
 4     request.setCharacterEncoding("GBK");
 5 %>
 6 <%
 7 int empno=0;
 8     try
 9     {
10         empno=Integer.parseInt(request.getParameter("empno"));
11     }
12     catch(Exception ex)
13     {
14         
15     }    
16 %>
17 <%
18 String DBDRIVER = "oracle.jdbc.driver.OracleDriver" ;
19 String DBURL = "jdbc:oracle:thin:@localhost:1521:study" ;
20 String DBUSER = "scott" ;
21 String DBPASSWORD = "tiger" ;
22 %>
23 <%
24     Connection conn=null;
25     PreparedStatement psmt=null;
26     ResultSet rst=null;
27 %>
28 
29 <%
30 String msg="雇员删除失败!";
31     Class.forName(DBDRIVER);
32     conn=DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD);    
33 String sql="DELETE FROM EMP WHERE empno=?";                 
34     psmt=conn.prepareStatement(sql);
35     psmt.setInt(1,empno);
36     try
37     {
38 int n=psmt.executeUpdate();
39         System.out.println(n);
40 if(n>0)
41         {
42             msg="雇员删除成功!";
43         }
44     }
45     catch(Exception ex)
46     {        
47         ex.printStackTrace();
48     }
49     finally
50     {
51         try
52         {
53             conn.close();
54         }
55         catch(Exception ex)
56         {
57             ex.printStackTrace();
58         }
59     }
60     
61 %>
62 <script language="javascript">
63     alert("<%=msg%>");
64     window.location="fuck_page_source.jsp?cp=<%=request.getParameter("cp")%>&ls=<%=request.getParameter("ls")%>";
65 </script>

-----------------总结:通过地址重写的方式完成了CRUD操作，但代码重复的太多了。

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原文地址：https://www.cnblogs.com/xiongyu/p/2353328.html