java 生成sql语句

package com.iminido.util.dev;

import com.iminido.db.Conn;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;

public class DataBaseStruct {

//	private final String DRIVER =  "oracle.jdbc.driver.OracleDriver";
//	private final String URI = "jdbc:oracle:thin:@192.168.1.6:1521:orcl";
//	private final String NAME = "xcww";
//	private final String PASSWORD = "1";
    private Connection conn = null;
    private PreparedStatement pstmt = null;
    private ResultSet rs = null;
    private ResultSetMetaData rsm = null;

    public static void main(String[] args) {
        DataBaseStruct dbs = new DataBaseStruct();
        dbs.getTableStruct("t_user");
    }

    public void getTableStruct(String tableName) {
        try {
//	    	 Class.forName(DRIVER);
//			 conn = DriverManager.getConnection(URI,NAME,PASSWORD);
            conn = Conn.conn();
            pstmt = (PreparedStatement) conn.prepareStatement("select * from " + tableName);
            pstmt.execute();
            rsm = (ResultSetMetaData) pstmt.getMetaData();

            StringBuilder insert = new StringBuilder();
            insert.append("INSERT INTO " + tableName + "(");
            for (int i = 1; i < rsm.getColumnCount() + 1; i++) {
                insert.append("'").append(rsm.getColumnName(i)).append("',");
            }
            insert.append(") values (");
            for (int i = 1; i < rsm.getColumnCount() + 1; i++) {
                insert.append("'").append(rsm.getColumnName(i)).append("',");
            }
            insert.append(");");
            System.out.println(insert.toString().replace(",)", ")").toUpperCase());

        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                pstmt.close();
                conn.close();
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}