这是查询页面的代码
<%@ page contentType="text/html"%>
<%@page pageEncoding="gb2312"%>
<%@page import="java.sql.*" %> <%--导入java.sql包--%>
<html>
<head>
<title >个人信息查询</title>
</head>
<body bgcolor="skyblue">
<%
try {
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/db_users";
String username = "root";
String password = "hang1314521..";
Connection conn = DriverManager.getConnection(url, username, password);
if(conn != null){
out.print("数据库连接成功!");
out.print("<br />");
%>
<table align="center" border="2">
<tr>
<td width="100" id="title">id</td>
<td width="100" name="title">姓名</td>
<td width="100" sno="title">学号</td>
<td width="100" sex="title">性别</td>
<td width="100" age="title">年龄</td>
</tr>
<%
Statement stmt = null;
ResultSet rs = null;
String name = new String(request.getParameter("name").getBytes("iso-8859-1"), "gb2312");
String sql = "SELECT * FROM test1 WHERE name like '%"+name+"%' ";
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
out.print("查询结果:");
out.print("<br/>");
while (rs.next()) {%>
<tr>
<td width="100" ><%=rs.getString("id") %></td>
<td width="100" ><%=rs.getString("name") %></td>
<td width="100"><%=rs.getString("sno") %></td>
<td width="100"><%=rs.getString("sex") %></td>
<td width="100"><%=rs.getString("age") %></td>
</tr>
<%
}
}else{
out.print("连接失败!");
}
}catch (Exception e) {
e.printStackTrace();
out.print("数据库连接异常!");
}
%>
</table>
<h1 align="center" ><input type="button" name="Submit" onclick="javascript:history.back(-1);" value="返回上一页"> </h1>
</body>
</html>
第一张图查询张三个人信息 查询结果为空
第二张图未输入查询信息 查询到表的全部内容