package com.Embed.util;

import java.sql.Connection;

import java.sql.DriverManager;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

public class Common {

//?判斷用戶輸入的時間格式是否正確

public static boolean checkDateTime(String inputDate) {

String DATE_TIME_FORMAT = "yyyy-MM-dd";

java.text.SimpleDateFormat simpleDateFormat = new java.text.SimpleDateFormat(

DATE_TIME_FORMAT);

simpleDateFormat.setLenient(false);

Date d = new Date();

boolean check = false;

try{

d = simpleDateFormat.parse(inputDate);

check = true;

}catch(Exception ex){

check = false;

ex.printStackTrace();

}

return check;

}

//?判斷用戶輸入的是否是數字

public static boolean checkNum(String inputValue) {

return false;

}

public static String toUtf8String(String s) {

StringBuffer sb = new StringBuffer();

for (int i = 0; i < s.length(); i++) {

char c = s.charAt(i);

if (c >= 0 && c <= 255) {

sb.append(c);

} else {

byte[] b;

try {

b = Character.toString(c).getBytes("utf-8");

} catch (Exception ex) {

System.out.println(ex);

b = new byte[0];

}

for (int j = 0; j < b.length; j++) {

int k = b[j];

if (k < 0)

k += 256;

sb.append("%" + Integer.toHexString(k).toUpperCase());

}

}

}

return sb.toString();

}

public static Connection getConnection() {

Connection conn = null;

String Driver = "org.gjt.mm.mysql.Driver";

//??String Url = "jdbc:mysql://888888888:888/8888?useUnicode=true&characterEncoding=GBK";

//??String user = "8888";

//??String pwd = "8888";

String Url = "jdbc:mysql://localhost:3306/8888?useUnicode=true&characterEncoding=GBK";

String user = "root";

String pwd = "000";

try {

Class.forName(Driver);

conn = DriverManager.getConnection(Url, user, pwd);

} catch (Exception e) {

e.printStackTrace();

}

return conn;

}

// 返回系統時間..其他類可以直接調用此方法。

public static String getDataTime() {

String DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";

java.text.SimpleDateFormat simpleDateFormat = new java.text.SimpleDateFormat(

DATE_TIME_FORMAT);

String time = simpleDateFormat.format(new java.util.Date(System

.currentTimeMillis()));

return time;

}

/**

* 此方法判斷輸入字符是否為數字0-9 是返回true不是返回false

*

* @param c

*??????????? char

* @return boolean

*/

public static boolean isDigit(char c) {

return (('0' <= c) && (c <= '9'));

}

/**

* 此方法判斷輸入字符是否為數字a-z或A-Z 是返回true不是返回false

*

* @param c

*??????????? char

* @return boolean

*/

public static boolean isAlpha(char c) {

return ((('a' <= c) && (c <= 'z')) || (('A' <= c) && (c <= 'Z')));

}

/**

* 此方法用于檢查密碼是否合法，用戶名密碼只能使用英文字母、數字以及-和_，并且首字符必須為字母或數字 密碼首字符必須為字母或數字

*

* @param passwordStr

*??????????? String

* @return boolean

*/

public static boolean checkUserNameAndPwssword(String passwordStr) {

for (int nIndex = 0; nIndex < passwordStr.length(); nIndex++) {

char cCheck = passwordStr.charAt(nIndex);

if (nIndex == 0 && (cCheck == '-' || cCheck == '_')) {

return false;

}

if (!(isDigit(cCheck) || isAlpha(cCheck) || cCheck == '-' || cCheck == '_')) {

return false;

}

}

return true;

}

/**

* 此方法檢查用戶名是否包含非法字符 ！！！！！！！！！！！此方法暫時注釋

*

* @param str

*??????????? String

* @return boolean

*/

// public static boolean checkUserName(String str)

// {

// for(int i=0;i// {

// char c=str.charAt(i);

// if(c=='\'' || c=='\"')

// {

// return false;

// }

// }

// return true;

// }

/**

* 此方法用于替換字符文本中的非法字符

*

* @param str

*??????????? String

* @return String

*/

public static String replaceStr(String str) {

// CleanHtmlBr =

// Replace(Replace(Replace(Replace(str,"",">"),,

// "

"), chr(32)&chr(32),"??")

return str.replaceAll("", ">").replaceAll(

"'", "‘").replaceAll("\"", "“");

}

/**

* 此方法用于替換字符文本中"引號;

*

* @param str

*??????????? String

* @return String

*/

public static String replaceComma(String str) {

// CleanHtmlBr =

// Replace(Replace(Replace(Replace(str,"",">"),,

// "

"), chr(32)&chr(32),"??")

return str.replaceAll("'", "‘").replaceAll("\"", "“");

}

/**

* 此方法用于把字符“引號轉換回普通引號";

*

* @param str

*??????????? String

* @return String

*/

public static String replaceReComma(String str) {

// CleanHtmlBr =

// Replace(Replace(Replace(Replace(str,"",">"),,

// "

"), chr(32)&chr(32),"??")

return str.replaceAll("‘", "'").replaceAll("“", "\"");

}

/**

* 此方法檢查email有效性 返回提示信息 如果返回字符串ok則通過驗證

*

* @param email

*??????????? String

* @return String

*/

public static String checkEmail(String email) {

String checkEmail = email;

String ok = "ok";

// 檢測輸入的EMAIL地址是否以 非法符號"."或"@"作為起始字符

Pattern p = Pattern.compile("^\\.|^\\@");

Matcher m = p.matcher(checkEmail);

if (m.find()) {

ok = "EMAIL地址不能以'.'或作為起始字符";

return ok;

}

// 檢測是否以"www."為起始

p = Pattern.compile("^www\\.");

m = p.matcher(checkEmail);

if (m.find()) {

ok = "EMAIL地址不能以'www.'起始";

return ok;

}

// 檢測是否包含非法字符

p = Pattern.compile("[^A-Za-z0-9\\.\\@_\\-~#]+");

m = p.matcher(checkEmail);

StringBuffer sb = new StringBuffer();

boolean result = m.find();

boolean deletedIllegalChars = false;

while (result) {

// 如果找到了非法字符那么就設下標記

deletedIllegalChars = true;

// 如果里面包含非法字符如冒號雙引號等，那么就把他們消去，加到SB里面

m.appendReplacement(sb, "");

result = m.find();

}

m.appendTail(sb);

checkEmail = sb.toString();

if (deletedIllegalChars) {

ok = "輸入的EMAIL地址里包含有冒號、逗號等非法字符，請修改";

}

return ok;

}

}

總結

以上是生活随笔為你收集整理的java输入正确的信息_判断用户输入的信息是否正确的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。