小编rat*_*esh的帖子

我遇到了错误,这里我的第42号线是while(rs.next()){,请帮助我这个我被困在这几个小时.

> Exception in thread "main" java.sql.SQLException: Operation not allowed after ResultSet closed
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:998)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:937)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:872)
    at com.mysql.jdbc.ResultSetImpl.checkClosed(ResultSetImpl.java:740)
    at com.mysql.jdbc.ResultSetImpl.next(ResultSetImpl.java:6326)
    at removeStopwords.RemoveStopwords.main(RemoveStopwords.java:42)

这是我的代码:

package removeStopwords;

import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.StringTokenizer;

import com.mysql.jdbc.Connection;
import com.mysql.jdbc.Statement;

public class RemoveStopwords {

    // JDBC driver name and database URL
    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://localhost/mydbv2";

    // Database credentials
    static final String USER = "root";
    static final String PASS …