1、连接数据库的javabean
dataconn.java
package dataconn;
import java.sql.*;
public class dataconn{
String sConnStr = "jdbc:sqlserver://localhost:1433;DatabaseName=database";
String user="sa";
String password="sa";
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
public dataconn() {
try {
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
}
catch(java.lang.ClassNotFoundException e) {
System.err.println("news_conn(): " + e.getMessage());
}
}
public ResultSet executeQuery(String sql) {
rs = null;
try {
conn = DriverManager.getConnection(sConnStr,user,password);
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
rs = stmt.executeQuery(sql);
}
catch(SQLException ex) {
System.err.println("aq.executeQuery: " + ex.getMessage());
System.err.println("aq.executeQuerystrSQL: " + sql);
}
return rs;
}
public void executeUpdate(String sql) {
try {
conn = DriverManager.getConnection(sConnStr,user,password);
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
stmt.executeUpdate(sql);
}
catch(SQLException ex) {
System.err.println("aq.executeUpdate: " + ex.getMessage());
System.err.println("aq.executeUpadatestrSQL: " + sql);
}
}
public void closeStmt()
{
try{
stmt.close();
}
catch(SQLException e){
e.printStackTrace();
}
}
public void closeConn()
{
try{
conn.close();
}
catch(SQLException e){
e.printStackTrace();
}
}
}
2、调用javabean
<jsp:useBean id="connDbBean" scope="page" class="dataconn.dataconn"/>
3、read.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="connDbBean" scope="page" class="dataconn.dataconn"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>read</title>
</head>
<body>
<a href="add.jsp">add</a>
<form method='post' action="search.jsp">
<input type="text" name="str">
<input type="submit" value="search">
</form>
<table border="1" cellspacing="0" cellpadding="0">
<tr>
<td>id</td>
<td>title</td>
<td>content</td>
<td>删除</td>
<td>编辑</td>
</tr>
<%
String sql="select * from dataTableName";
ResultSet rs=connDbBean.executeQuery(sql);
while(rs.next()) {
%>
<tr>
<td><%=rs.getString(1)%> </td>
<td><%=rs.getString(2)%></td>
<td><%=rs.getString(3)%></td>
<td><a href="del.jsp?id=<%=rs.getString("id")%>">删除</a></td>
<td><a href="edit.jsp?id=<%=rs.getString("id")%>">编辑</a></td>
</tr>
<%}
rs.close();
connDbBean.closeStmt();
connDbBean.closeConn();
%>
</table>
</body>
</html>
4、add.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<form id="form1" name="form1" method="post" action="save.jsp">
<label>
title:
<input name="title" type="text" id="title" value="这是title" size="25" />
</label>
<p>
content:
<textarea name="content" cols="50" rows="15" id="content">这是content</textarea>
</p>
<p>
<label>
<input type="submit" name="Submit" value="提交" />
</label>
</p>
</form>
</body>
</html>
5、save.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="connDbBean" scope="page" class="dataconn.dataconn"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>save</title>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String title=request.getParameter("title");
String content=request.getParameter("content");
String sql="insert into dataTableName(title,content) values('"+ title +"','"+ content +"')";
connDbBean.executeUpdate(sql);
connDbBean.closeStmt();
connDbBean.closeConn();
response.sendRedirect("read.jsp");
%>
</body>
</html>
6、del.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="connDbBean" scope="page" class="dataconn.dataconn"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>save</title>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String id=request.getParameter("id");//应该判断一下id的合法性
String sql="delete from dataTableName where id="+ id +"";
connDbBean.executeUpdate(sql);
connDbBean.closeStmt();
connDbBean.closeConn();
response.sendRedirect("read.jsp");
%>
</body>
</html>
7、edit.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="connDbBean" scope="page" class="dataconn.dataconn"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<%
String id=request.getParameter("id");
String sql="select * from dataTableName where id="+ id;
ResultSet rs=connDbBean.executeQuery(sql);
rs.next();
%>
<form id="form1" name="form1" method="post" action="update.jsp?id=<%=id%>">
<label>
title:
<input name="title" type="text" id="title" value="<%=rs.getString("title")%>" size="25" />
</label>
<p>
content:
<textarea name="content" cols="50" rows="15" id="content"><%=rs.getString("content")%></textarea>
</p>
<p>
<label>
<input type="submit" name="Submit" value="更新" />
</label>
</p>
</form>
<%
rs.close();
connDbBean.closeStmt();
connDbBean.closeConn();
%>
</body>
</html>
8、update.jsp
<%@ page contentType="text/html; charset=utf-8" language="java" import="java.sql.*" errorPage="" %>
<jsp:useBean id="connDbBean" scope="page" class="dataconn.dataconn"/>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>save</title>
</head>
<body>
<%
request.setCharacterEncoding("utf-8");
String id=request.getParameter("id");//应该判断一下id的合法性
String title=request.getParameter("title");
String content=request.getParameter("content");
String sql="update dataTableName set title='"+ title +"', content='"+ content +"' where id="+ id;
connDbBean.executeUpdate(sql);
connDbBean.closeStmt();
connDbBean.closeConn();
response.sendRedirect("read.jsp");
%>
</body>
</html>
判断传递的参数的合法性是必要的。