func2.java

主要是描述的同学录系统

package com.user;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;

public class Func2 {
	Conn conn = null;

	Vo vo = null;

	Connection con = null;

	Statement stmt = null;// 一般的操作平台

	PreparedStatement pstmt = null;// 预处理操作平台

	ResultSet rs = null;

	boolean flag = false;

	public Vo getVo() {
		return vo;
	}

	public void setVo(Vo vo) {
		this.vo = vo;
	}

	public boolean doload(String username) {
		String str = "select * from xinxi where username='" + username + "'";
		try {
			conn = new Conn();
			con = conn.getConn();
			stmt = con.createStatement();
			rs = stmt.executeQuery(str);

			if (rs.next()) {
				flag = true;
				System.out.println("注册名重复");
			}
			rs.close();
			stmt.close();

		} catch (Exception e) {

			e.printStackTrace();
		}
		return flag;
	}
}