jsp <%%>程序段里的catch语句里怎么弹出提示框？
<%request.setCharacterEncoding("utf-8");//防止乱码
String id = request.getParameter("id");
int a=0;
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection conn = DriverManager.getConnection("jdbc:odbc:student");
Statement stat = conn.createStatement();
String sql = "delete from chengji where id = '" +id+ "'";
int i = stat.executeUpdate(sql);
a=a/i;
out.print("成功删除" + i + "行记录！");
stat.close();
conn.close();
}
catch(Exception e){ out.print("<%=check()%>"); }
%>
代码里的 catch语句体里该怎么写？
我在开头定义的下面的
<script language="javascript" type="text/javascript">
function check(){ alert("删除记录失败！请检查学号是否存在！");}
</script>
求老师们指教下
快期末考试了、、蛋疼啊、、
搜索更多相关主题的帖子:
where sql
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矮油、、不好意思、、开头的try{ 给掉了、、、
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我擦、、眼神不好、、咳咳 老师同学们请无视2楼吧
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<%%>里是不能调用到JS的 直接打印一个JS就行了
程序代码：
out.print("<script language="javascript" type="text/javascript">check()</script>");
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谢谢前辈啦 有什么方法可以弹出提示框确定之后直接返回前一个页面嘛？
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<script language="javascript" type="text/javascript">
function check(){ alert("删除记录失败！请检查学号是否存在！");location.href="上一个页面的链接";}
</script>
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嘿嘿 我又来了 说我的java 文件有错？我测试过java文件木有错啊
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 153 in the generated java file
Syntax error, insert "else Statement" to complete IfStatement
An error occurred at line: 153 in the generated java file
Syntax error, insert "}" to complete Block
An error occurred at line: 164 in the generated java file
Syntax error on token "}", delete this token
An error occurred at line: 165 in the generated java file
Syntax error, insert "}" to complete ClassBody
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:356)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:334)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:321)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
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这是java代码：
package mybean;
import java.io.*;
import java.sql.*;
public class A{
String id="";
String name="";
String fenshu="";
public A()
{
id="";
name="";
fenshu="";
}
public void setId(String id)
{
this.id=id;
}
public String getId()
{
return id;
}
public void setName(String name)
{
this.name=name;
}
public String getName()
{
return name;
}
public void setFenshu(String fenshu)
{
this.fenshu=fenshu;
}
public String getFenshu()
{
return fenshu;
}
public void conn()
{
if(id!="")
{
try{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection conn1 = DriverManager.getConnection("jdbc:odbc:student");
Statement stat1 = conn1.createStatement();
String sql1 = "select * from chengji where id='"+id+"'";
ResultSet rs1 = stat1.executeQuery(sql1);
while(rs1.next())
{
id=rs1.getString(1);
name=rs1.getString(2);
fenshu=rs1.getString(3);
}
if(rs1.next()==false)
{
id="";name="";fenshu="";
}
else
{
}
stat1.close();
conn1.close();
}
catch(Exception e)
{
System.out.print("请规范操作！");
}
}
else
{
}
}
public static void main(String[] args)
{
A a=new A();
a.setId("002");
a.conn();
if(a.name!="")
{
System.out.println(" id:"+a.id);
System.out.println(" name:"+a.name);
System.out.println("fenshu:"+a.fenshu);
}
else
{
System.out.println("数据库里没有这个id！");
}
}
}
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前辈们真的很抱歉浪费你们时间了 是我自己的错 我把表单的action 地址写错了、、转到别的页面才错了 灰常抱歉额、、、唉、、浪费了一天时间 数据库都没怎么复习、、明天要就考数据库了
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像你这阶段的数据库更本就不难
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