关键字中mysql数据库查询条件带中文无结果解决办法

package keyword;

import java.io.UnsupportedEncodingException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import cn.suning.automation.execute.Parameter;
import cn.suning.automation.param.Reference;

public class MySQLConnection {
    private static final String DBDRIVER = "com.mysql.jdbc.Driver";
    private static final String DBURL = "jdbc:mysql://localhost:3306/dbname"
            + "user=root@password=pwd@useUnicode=true&characterEncoding=UTF8";
    private static final String URL = "jdbc:mysql://localhost:3306/dbname?characterEncoding=UTF8"; //如果不指定字符集则在封装的关键字里查询不到结果
    private static final String DBUSER = "root";
    private static final String PASSWORD = "pwd";
    private Connection conn = null;

    public MySQLConnection() {
        try {
            Class.forName(DBDRIVER);
            //System.out.println("成功加载MySQL驱动！");
            this.conn = DriverManager.getConnection(URL, DBUSER, PASSWORD);
//            this.conn=DriverManager.getConnection(DBURL);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public Connection getConnection() {
        return this.conn;
    }

    public void close() {
        if (this.conn != null) {
            try {
                this.conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
    
    public static void encodedString(Parameter poParam) throws UnsupportedEncodingException {
        String sResult=String.valueOf(getValue());
        
        Reference<String> oResult=Reference.refer(poParam.getString("result"));
        oResult.setValue(poParam, sResult);
    }
    
    public static int getValue() {
        int value=0;
        MySQLConnection mySQLConnection = new MySQLConnection();
        Connection conn = mySQLConnection.getConnection();
        //String sql = "INSERT INTO student(name) VALUES(?)";
        String sql="SELECT colName FROM tableName where colName2='中文'";
        try {
            PreparedStatement statement = conn.prepareStatement(sql);
            // ResultSet resultSet=statement.executeQuery();
            //statement.setString(1, "赵六子");
           // System.out.println(statement.executeUpdate());
            ResultSet rs=statement.executeQuery(sql);
            
            while (rs.next()){                
                System.out.print(rs.getInt(1) + "\t");
//                System.out.print(rs.getInt(2) + "\t");
//                System.out.print(rs.getString(3) + "\t");
                System.out.println();
                value=rs.getInt(1);
            }
                
            rs.close();
            
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return value;
    }
    
    public static void main(String[]args) {
        System.out.println(getValue());
    }
}