jsp查询修改
也是只帖代码。。。。不讲解。
1、search.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'find.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
--> </head> <body>
<form action="goodsServlet">
商品名:<input type="text" name="goodsName"/><br/>
商品类型:<input type="text" name="goodsType"/><br/>
<input type="hidden" value="findAll" name="status"/>
<input type="submit" value="查询"/>
</form>
</body>
</html>
2、show.jsp
<%@ page language="java" import="java.util.*,java.sql.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'show.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
--> <script type="text/javascript">
function delGoods(no){
window.location.href="goodsServlet?no="+no+"&status=delete&goodsName=<%=request.getParameter("goodsName")%>&goodsType=<%=request.getParameter("goodsType")%>";
} function editGoods(no){
window.location.href="goodsServlet?no="+no+"&status=edit&goodsName=<%=request.getParameter("goodsName")%>&goodsType=<%=request.getParameter("goodsType")%>";
}
</script> </head> <body>
<table border="1" cellpadding="0" cellspacing="0" width="600">
<tr>
<td>商品编号</td>
<td>商品名</td>
<td>生产日期</td>
<td>地址</td>
<td>商品类型</td>
<td>操作</td>
</tr> <%
ResultSet rs = (ResultSet)request.getAttribute("rs");
while(rs.next()){
%>
<tr>
<td><%=rs.getString("no") %></td>
<td><%=rs.getString("name") %></td>
<td><%=rs.getString("time") %></td>
<td><%=rs.getString("address") %></td>
<td><%=rs.getString("type") %></td>
<td>
<input type="button" value="删除" onclick="delGoods('<%=rs.getString("no") %>')"/>
<input type="button" value="修改" onclick="editGoods('<%=rs.getString("no") %>')"/>
</td>
</tr>
<%
}
%>
</table>
</body>
</html>
3、showEdit.jsp
<%@ page language="java" import="java.util.*,java.sql.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>"> <title>My JSP 'showEdit.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
--> <script type="text/javascript"> function editGoodsOK(no){ document.getElementById("no").value=no;
document.getElementById("form").submit(); }
</script> </head> <body>
<form action="goodsServlet" id="form">
<table border="1" cellpadding="0" cellspacing="0" width="500">
<tr>
<td>商品编号</td>
<td>商品名</td>
<td>生产日期</td>
<td>地址</td>
<td>商品类型</td>
<td>操作</td>
</tr> <%
ResultSet rs = (ResultSet)request.getAttribute("rs");
while(rs.next()){
%>
<tr>
<td><input type="text" name="no" value="<%=rs.getString("no") %>" readonly="readonly"/></td>
<td><input type="text" name="name" value="<%=rs.getString("name") %>"/></td>
<td><input type="text" name="time" value="<%=rs.getString("time") %>"/></td>
<td><input type="text" name="address" value="<%=rs.getString("address") %>"/></td>
<td><input type="text" name="type" value="<%=rs.getString("type") %>"/></td>
<td>
<input type="button" value="确认修改" onclick="editGoodsOK('<%=rs.getString("no") %>')"/>
</td>
</tr>
<%
}
%>
<input type="hidden" name="no" id="no"/><br/>
<input type="hidden" name="status" value="editOK"/><br/>
<input type="hidden" name="goodsName" value="<%=request.getParameter("goodsName")%>"/><br/>
<input type="hidden" name="goodsType" value="<%=request.getParameter("goodsType")%>"/><br/>
</table>
</form>
</body>
</html>
4、DBHelper类
package com.cn.tools; import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement; /**
* ��ȡ���ݿ���������Ӷ���?
* �ر����ݿ�����ĸ������?
* @author ������
*
*/
public class DBHelper {
private static final String className = "com.mysql.jdbc.Driver";
private static final String url = "jdbc:mysql://localhost:3306/jsp?characterEncoding=utf8&useSSL=true";
private static final String uname = "root";
private static final String upass = "**********"; /**
* ��ȡ���ݿ����Ӷ���ķ���?
*/
public static Connection getConn(){
Connection conn = null;
try{
Class.forName(className);
conn = DriverManager.getConnection(url,uname, upass);
} catch(Exception e){
e.printStackTrace();
} return conn;
} /**
* �ر����ݿ����Ӷ���
*/
public static void closeConn(Connection conn){
try{
if(conn!=null){
conn.close();
}
} catch(Exception e){
e.printStackTrace();
}
} /**
* �ر����ݿ��������?
*/
public static void closeStmt(Statement stmt){
try{
if(stmt!=null){
stmt.close();
}
} catch(Exception e){
e.printStackTrace();
}
} /**
* �ر����ݿ��������?
*/
public static void closePstmt(PreparedStatement pstmt){
try{
if(pstmt!=null){
pstmt.close();
}
} catch(Exception e){
e.printStackTrace();
}
} /**
* �ر����ݿ��������?
*/
public static void closeRs(ResultSet rs){
try{
if(rs!=null){
rs.close();
}
} catch(Exception e){
e.printStackTrace();
}
}
}
5、GoodsServlet
package com.cn.servlet; import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement; import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; import com.cn.tools.DBHelper; public class GoodsServlet extends HttpServlet { private DBHelper db = new DBHelper();
private Connection conn = db.getConn(); public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { this.doPost(request, response);
} public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { String status = request.getParameter("status"); if(status.equals("findAll")){
this.findAll(request, response);
}else if(status.equals("delete")){
this.delete(request, response);
}else if(status.equals("edit")){
this.edit(request, response);
}else if(status.equals("editOK")){
this.editOK(request, response);
} } /**
* 查询商品
*/ public void findAll(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { String goodsName = request.getParameter("goodsName");
String goodsType = request.getParameter("goodsType"); ResultSet rs = null;
try {
Statement st = conn.createStatement(); String sql = "select * from goods t where 1=1 "; if(goodsName!=null||!goodsName.equals("")){
sql += " and t.name like '%"+goodsName+"%'";
}
if(goodsType!=null||!goodsType.equals("")){
sql += " and t.type like '%"+goodsType+"%'";
} rs = st.executeQuery(sql); } catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} request.setAttribute("rs", rs);
request.getRequestDispatcher("show.jsp").forward(request, response);
} /**
* 删除商品
*/
public void delete(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { String no = request.getParameter("no");
try {
Statement st = conn.createStatement();
st.execute("delete from goods where no='"+no+"'");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
this.findAll(request, response);
} /**
* 修改数据展示
*/
public void edit(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String no = request.getParameter("no");
ResultSet rs = null;
try {
Statement st = conn.createStatement();
rs = st.executeQuery("select * from goods where no='"+no+"'");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
request.setAttribute("rs", rs);
request.getRequestDispatcher("showEdit.jsp").forward(request, response);
} /**
* 确认修改
*/
public void editOK(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException { String no = request.getParameter("no");
String name = request.getParameter("name");
String time = request.getParameter("time");
String address = request.getParameter("address");
String type = request.getParameter("type"); try {
Statement st = conn.createStatement();
st.execute("update goods set name='"+name+"',time='"+time+"',address='"+address+"',type='"+type+"' where no='"+no+"'");
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
this.findAll(request, response);
} }
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