毕业论文目录及正文等(11)

毕业论文（设计）

}

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} /**

}

}

e.printStackTrace(); this.closeAll(conn, pstmt, rs);

} catch (Exception e) { } finally {

return user;

* 判断数据库中当前用户名是否存在 * @param userName 用户名

* @return 存在返回true,否则返回false */

public boolean findUsers(String userName){

String sql = \try { }

return false;

conn = this.getConn();

pstmt = conn.prepareStatement(sql); pstmt.setString(1, userName); rs = pstmt.executeQuery(); if (rs.next()) { }

e.printStackTrace(); this.closeAll(conn, pstmt, rs);

return true;

} catch (Exception e) { } finally {

毕业论文（设计）

} /**

* 查找所有的注册用户信息 * @return 用户列表 */

public List selectAllUser(){

List list=new ArrayList(); String sql = \try {

conn = this.getConn();

pstmt = conn.prepareStatement(sql); rs = pstmt.executeQuery(); while(rs.next()) {

Users user = new Users();

user.setUserID(rs.getInt(\

user.setUserName(rs.getString(%user.setPassword(rs.getString(%user.setStatus(rs.getInt(\

list.add(user);

String sql = \

String[] params = new String[] { userName, password ,status+\return this.executeSQL(sql, params); /**

* 添加用户信息 * @param userName * @param password

* @return 操作数据库影响行数 */

public int insertUser(String userName, String password,int status) {

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