📄 delete1.jsp
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<html>
<body>
<%@ page contentType="text/html;charset=gb2312" %>
<%@ page language="java" import="java.sql.*" %>
<%String mysubject=request.getParameter("subject");
Connection con = null;
ResultSet rs = null;
Statement statement;
String mysql_str;
String mysql;
try {
// 登记JDBC驱动程序
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//连接数据库
con = DriverManager.getConnection("jdbc:odbc:mydb","", "");
//创建语句对象
statement = con.createStatement();
//执行SQL语句
mysql="delete * from wenti where subject='"+mysubject+"' and answer<>null";
//将Unicode编码的String类型数据转化为“ISO-8859-1”编码
byte[] temp=mysql.getBytes("ISO-8859-1");
mysql_str=new String(temp);
statement.executeQuery(mysql_str);
//取得结果，输出到屏幕
}
catch (Exception e) {
//out.println(e.getMessage());
// out.println(e.toString());
}
%>
<%
statement = con.createStatement();
mysql="select * from wenti where subject='"+mysubject+"'";
//将Unicode编码的String类型数据转化为“ISO-8859-1”编码
byte[] temp=mysql.getBytes("ISO-8859-1");
mysql_str=new String(temp);
rs=statement.executeQuery(mysql_str);
if(rs.next()){
out.println("删除不成功");
}
else{
out.println("删除成功");
}
//关闭数据库连接
con.close();
%>
<center>
</body>
</html>
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