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());
     }
 }