请各位大侠看看我下面的代码，为什么在执行到try的时候就出现标题中的错误
package db;
import java.sql.*;
import java.io.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.util.*;
import java.math.*;
public class db extends TagSupport
{
private String table;
public int doStartTag() throws JspTagException
{
return(SKIP_BODY);
}
public int doEndTag()
{
try
{
Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver ").newInstance();
Connection conn=DriverManager.getConnection( "jdbc:microsoft:sqlserver://202.112.14.112:1433;DatabaseName=dongshi ", "sa ", "ds ");
Statement stmt=conn.createStatement();
ResultSet rs=stmt.executeQuery( "select * from "+table);
while(rs.next())
{
System.out.print(rs.getString( "uid "));
System.out.print(rs.getString( "pwd "));
System.out.print(rs.getString( "name "));
System.out.print(rs.getString( "age "));
}
//pageContext.getOut().write(table);
}
catch
{
return (EVAL_PAGE);
}
finally
{
}
return (SKIP_BODY);
}
public void settable(String table)
{
this.table=table;
}
public String gettable(String table){
return(table);
}
}
------解决方案--------------------
楼主的是自定义标签吧,我不太熟悉,我感觉太麻烦,我一般写的是标签文件,因为不用写标签库描述,我刚刚试了下楼主的代码,扩号好像有问题,代码应该没问题.
package test;
import javax.servlet.Servlet.*;
import java.sql.*;
import java.io.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;
import java.util.*;
import java.math.*;
public class test extends TagSupport {
private String table = "emPop ";
public int doStartTag() throws JspTagException {
return (SKIP_BODY);
}
public int doEndTag() {
try {
Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver ").
newInstance();
Connection conn = DriverManager.getConnection(
"jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=VODDATA ",
"sa ", " ");
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery( "select * from " + table);
while (rs.next()) {
System.out.print(rs.getString( "emPop_id "));
}
//pageContext.getOut().write(table);
} catch (Exception ex) {
return (EVAL_PAGE);
}
return (SKIP_BODY);
}
}
编译通过了的.