[最新]MapReduce综合应用案例 — 招聘数据清洗

DBHelper.java

package com;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
public class DBHelper {
    /********** begin **********/
    private static final String driver = "com.mysql.jdbc.Driver";
    private static final String url = "jdbc:mysql://localhost:3306/mydb?useUnicode=true&characterEncoding=UTF-8";
    private static final String username = "root";
    private static final String password = "123123";
    private static Connection conn = null;
    static {
        try {
            Class.forName(driver);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }
    public static Connection getConnection() {
        if (conn == null) {