为什么我的jsp数据库更新不了,哪位老师帮帮忙看看
<%@ page contentType= "text/html;charset=gb2312 "%>
<%@ page import= "java.sql.* "%>
<html>
<body>
<%
//获取提交的姓名
String name=request.getParameter( "name ");
if(name==null)
{
name= " ";
}
name=new String(name.getBytes( "ISO8859_1 "), "gb2312 ");
//out.print(name);
//获取提交的新的数学成绩
String newMath=request.getParameter( "math ");
if(newMath==null)
{
newMath= "-100 ";
}
//out.print(newMath);
//获取提交的新的英语成绩
String newEnglish=request.getParameter( "english ");
if(newEnglish==null)
{
newEnglish= "-100 ";
}
//out.print(newEnglish);
//获取提交的新的物理成绩
String newPhysics=request.getParameter( "physics ");
if(newPhysics==null)
{
newPhysics= "-100 ";
}
//out.print(newPhysics);
Connection con;
Statement sql;
ResultSet rs;
try
{
Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver ");
}
catch(ClassNotFoundException e)
{}
try
{
con=DriverManager.getConnection( "jdbc:odbc:student ", "sa ", "123 ");
sql=con.createStatement();
String condition1=
"update students set mscore= "+newMath+
"where name= ' "+name+ " ' ";
String condition2=
"update students set escore= "+newEnglish+
"where name= ' "+name+ " ' ";
String condition3=
"update students set pscore= "+newPhysics+
"where name= ' "+name+ " ' ";
//执行更新操作
sql.executeUpdate(condition1);
sql.executeUpdate(condition2);
sql.executeUpdate(condition3);
//显示更新后的表中的记录
%>
<p> 更新后的表的记录：
<%
rs=sql.executeQuery( "select * from students ");
out.println( " <table border=1> ");
out.println( " <tr> ");
out.println( " <th width=100> "+ "学号 ");
out.println( " <th width=100> "+ "姓名 ");
out.println( " <th width=50> "+ "数学成绩 ");
out.println( " <th width=50> "+ "英语成绩 ");
out.println( " <th width=50> "+ "物理成绩 ");
out.println( " </tr> ");
while(rs.next())
{
out.print( " <tr> ");
out.print( " <td> "+rs.getString(1)+ " </td> ");
out.print( " <td> "+rs.getString(2)+ " </td> ");
out.print( " <td> "+rs.getInt( "mscore ")+ " </td> ");
out.print( " <td> "+rs.getInt( "escore ")+ " </td> ");
out.print( " <td> "+rs.getInt( "pscore ")+ " </td> ");
out.print( " </tr> ");
}
out.print( " </table> ");
con.close();
}
catch(SQLException e1)
{}
%>
</body>
</html>
[解决办法]
你把你的sql语句打出来看看，语句绝对错了
我没说错的话应该是(比如你的newMath=80，name=lisi)
update students set mscore=80where name= 'lisi '
[解决办法]
开始写上getAutoCommit(false);
...........
最后commit() ;
[解决办法]
String condition1=
"update students set mscore= "+newMath+
"where name= ' "+name+ " ' ";
String condition2=
"update students set escore= "+newEnglish+
"where name= ' "+name+ " ' ";
String condition3=
"update students set pscore= "+newPhysics+
"where name= ' "+name+ " ' ";
-------------------------------------------
正如Top
YOYOOOP
说得．
你的ｓｑｌ生成时 update students set mscore=80where name= 'lisi '
应该在where 前加空格
[解决办法]
[解决办法]
呵呵
