package com.mandi.common;
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import java.io.UnsupportedEncodingException;
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import java.security.InvalidKeyException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.security.SecureRandom;
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import java.text.SimpleDateFormat;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.Random;
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import java.util.Set;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import javax.crypto.BadPaddingException;
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import javax.crypto.Cipher;
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import javax.crypto.IllegalBlockSizeException;
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import javax.crypto.KeyGenerator;
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import javax.crypto.NoSuchPaddingException;
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import javax.crypto.SecretKey;
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import javax.crypto.spec.SecretKeySpec;
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import org.jsoup.Jsoup;
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import org.jsoup.nodes.Document;
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import org.jsoup.nodes.Element;
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import org.jsoup.select.Elements;
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public class BasicMethod {
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public static String byte2hexStr(byte[] buf){
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if(buf==null)
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return null;
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StringBuffer sb=new StringBuffer();
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for(int i=0;i<buf.length;i++){
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String hex=Integer.toHexString(buf[i]&0xff);
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if(hex.length()==1)
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{
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hex='0'+hex;
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}
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sb.append(hex);
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}
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return sb.toString();
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}
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public static byte[] hexStr2bytes(String str){
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if(str==null||str.length()<1)
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return null;
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byte[] result=new byte[str.length()>>1];
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for(int i=0;i<str.length();i+=2){
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int high=Integer.parseInt(str.substring(i, i+1),16);
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int low=Integer.parseInt(str.substring(i+1, i+2),16);
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result[i>>1]=(byte)(((high<<4)&0xf0)+low);
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}
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return result;
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}
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/**
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* Aes 加密
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* @param source
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* @param password
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* @return
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*/
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public static String encryptAES(String source,String password){
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if(source==null||password==null)
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return null;
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try {
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KeyGenerator keygen=KeyGenerator.getInstance("AES");
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SecureRandom sr=SecureRandom.getInstance("SHA1PRNG");
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sr.setSeed(password.getBytes());
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keygen.init(128,sr);
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SecretKey key=keygen.generateKey();
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byte[] keyendoce=key.getEncoded();
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SecretKeySpec keyspec=new SecretKeySpec(keyendoce, "AES");
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Cipher cipher=Cipher.getInstance("AES");
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cipher.init(Cipher.ENCRYPT_MODE,keyspec );
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byte[] sbytes=null;
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try {
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sbytes = cipher.doFinal(source.getBytes("utf8"));
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} catch (UnsupportedEncodingException e) {
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System.out.println("加密过程中，getbyte有错误!");
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e.printStackTrace();
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}
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return byte2hexStr(sbytes); //这里也可以用base64来表示,这样解密的时候反解析base64
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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} catch (NoSuchPaddingException e) {
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e.printStackTrace();
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} catch (InvalidKeyException e) {
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e.printStackTrace();
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} catch (IllegalBlockSizeException e) {
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e.printStackTrace();
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} catch (BadPaddingException e) {
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e.printStackTrace();
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}
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return "";
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}
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public static String decryptAES(String source,String password)
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{
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if(source==null||password==null)
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return "";
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byte[] sbytes=hexStr2bytes(source);
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try {
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KeyGenerator keygen=KeyGenerator.getInstance("AES");
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SecureRandom sr=SecureRandom.getInstance("SHA1PRNG");
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sr.setSeed(password.getBytes());
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keygen.init(128,sr);
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SecretKey key=keygen.generateKey();
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byte[] keyendoce=key.getEncoded();
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SecretKeySpec keyspec=new SecretKeySpec(keyendoce, "AES");
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Cipher cipher=Cipher.getInstance("AES");
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cipher.init(Cipher.DECRYPT_MODE, keyspec);
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byte[] dbytes=cipher.doFinal(sbytes);
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try {
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return new String(dbytes,"utf8");
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} catch (UnsupportedEncodingException e) {
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System.out.println("解密过程中，编码错误!");
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e.printStackTrace();
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}
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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} catch (NoSuchPaddingException e) {
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e.printStackTrace();
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} catch (InvalidKeyException e) {
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e.printStackTrace();
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} catch (IllegalBlockSizeException e) {
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e.printStackTrace();
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} catch (BadPaddingException e) {
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e.printStackTrace();
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}
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return "";
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}
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public static String encryptSHA(String source)//SHA 摘要，不可逆
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{
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if(source==null)
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return null;
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MessageDigest md;
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try {
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md = MessageDigest.getInstance("SHA-256");
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byte[] bytes=md.digest(source.getBytes());
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return byte2hexStr(bytes);
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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return "";
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}
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public static String encryptMD5(String source)//SHA 摘要，不可逆
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{
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if(source==null)
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return null;
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MessageDigest md;
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try {
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md = MessageDigest.getInstance("md5");
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byte[] bytes=md.digest(source.getBytes("utf-8"));
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return byte2hexStr(bytes);
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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return "";
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}
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public static String encryptSHA1(String source)//SHA 摘要，不可逆
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{
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if(source==null)
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return null;
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MessageDigest md;
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try {
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md = MessageDigest.getInstance("SHA-1");
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byte[] bytes=md.digest(source.getBytes());
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return byte2hexStr(bytes);
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} catch (NoSuchAlgorithmException e) {
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e.printStackTrace();
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}
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return "";
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}
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public static boolean checkEmailFormat(String email)
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{
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if(email==null)
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return false;
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String patterns="[a-zA-Z]+([-.][a-zA-Z0-9_-]+)*@[A-Za-z0-9]+(\\.[A-Za-z0-9]+)*" +"(\\.[A-Za-z]{2,3})$";
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Pattern p=Pattern.compile(patterns);
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Matcher m=p.matcher(email);
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if(m.matches())
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return true;
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return false;
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}
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public static boolean checkvalidusername(String username)
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{
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if(username==null)
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return false;
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String patterns="^[a-zA-Z][a-zA-Z0-9._-]{5,50}";
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Pattern p=Pattern.compile(patterns);
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Matcher m=p.matcher(username);
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if(m.matches())
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return true;
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return false;
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}
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public static boolean checkIP(String ip)
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{
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if(ip==null)
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return false;
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String pattern="^(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])\\.(\\d{1,2}|1\\d\\d|2[0-4]\\d|25[0-5])$";
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Pattern p=Pattern.compile(pattern);
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Matcher m=p.matcher(ip);
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if(m.matches())
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return true;
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return false;
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}
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/**
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* 判断date是否处于当前时间-days前
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* @param date
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* @param days
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* @return
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*/
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public static boolean before(Date date, int days)
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{
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if(date==null)
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return false;
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Date now=new Date(System.currentTimeMillis());
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Calendar nowcal=Calendar.getInstance();
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nowcal.setTime(now);
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Calendar datecal=Calendar.getInstance();
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datecal.setTime(date);
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nowcal.add(Calendar.DAY_OF_MONTH, -days);
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if(datecal.before(nowcal))
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return true;
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return false;
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}
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/**
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* 判断date是否处于当前时间+days后
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* @param date
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* @param days
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* @return
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*/
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public static boolean after(Date date,int days)
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{
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if(date==null)
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return false;
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Date now=new Date(System.currentTimeMillis());
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Calendar nowcal=Calendar.getInstance();
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nowcal.setTime(now);
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Calendar datecal=Calendar.getInstance();
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datecal.setTime(date);
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nowcal.add(Calendar.DAY_OF_MONTH, days);
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if(datecal.after(nowcal))
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return true;
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return false;
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}
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/**
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* 讲string字符串，规整化掉sql里面的特殊字符'和\
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*/
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public static String sqlformat(String param)
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{
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if(param==null)
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return null;
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param=param.trim();
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String t=param.replaceAll("'", "\\\\'");
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t=t.replaceAll("\"", "\\\\\"");
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return t;
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}
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/**
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* 使用Jsoup包解析html content，并提取出所有的img超链接
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* @param content
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* @return
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*/
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public static String parseimgs(String content)
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{
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if(content==null)
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return null;
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Document doc=Jsoup.parse(content);
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Elements eles=doc.select("img");
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Iterator<Element> ele=eles.iterator();
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Set<String> set=new HashSet<String>();
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while(ele.hasNext())
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{
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Element e=ele.next();
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set.add(e.attr("src"));
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}
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if(set.size()>0)
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return Jacksonmethod.tojson(set, false);
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return null;
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}
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public static int countDays(Date stime,Date etime){
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if(stime==null||etime==null)
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return 0;
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return (int)((etime.getTime() - stime.getTime()) / (1000L * 60L * 60L * 24L));
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}
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public static String randomstr(int length)
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{
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if(length<=0)
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return null;
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char[] chars = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8',
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'9', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'k', 'l',
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'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x',
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'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J',
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'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
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'W', 'X', 'Y', 'Z' };
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Random r=new Random(System.currentTimeMillis());
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int charlength=chars.length;
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StringBuffer sb=new StringBuffer();
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for (int i = 0; i <length; i++) {
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int ri=r.nextInt(charlength);
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sb.append(chars[ri]);
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}
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return sb.toString();
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}
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public static String first2Upper(String str)
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{
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if(str==null)
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return null;
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char[] cs=str.toCharArray();
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cs[0]-=32;
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return String.valueOf(cs);
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}
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public static String getNow(Date now,String format){
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Date d=new Date();
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if(now!=null){
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d=now;
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}
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SimpleDateFormat sdf=new SimpleDateFormat(format==null?"yyyy-MM-dd HH:mm:ss":format);
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return sdf.format(d);
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}
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}
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