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package javabean;
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import java.math.BigInteger;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.text.SimpleDateFormat;
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import net.sf.json.JSONObject;
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public class Util {
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/**
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* 主要用来计算json字符串中对象的个数
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* @param str
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* @param contain
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* @return
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*/
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public static int getCountString(String str, String contain) {
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int count = ( str.length()-str.replace(contain, "").length() ) / contain.length();
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return count;
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}
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/**
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* 数据库取出来的datetime有 .0 ,用来去掉
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* @param dateTime
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* @return
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*/
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public static String getFormatDateTime(String dateTime) {
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if(dateTime != null && dateTime.indexOf(".0") != -1) {
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return dateTime.substring(0, dateTime.length()-2);
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}else if(dateTime != null) {
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return dateTime;
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}
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return null;
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}
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/**
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* 获取当前时间
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* @return
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*/
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public static String getCurrentTimeString() {
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java.util.Date date = new java.util.Date();
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SimpleDateFormat dateFormat= new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
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return dateFormat.format(date);
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}
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/*
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* 返回json数据
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*/
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public static String jsonResponse(int code, String msg, String data) {
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JSONObject jsonObject = new JSONObject();
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jsonObject.put("code", code);
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jsonObject.put("msg", msg);
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if( data!=null ) {
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jsonObject.put("data", data);
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}
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return jsonObject.toString();
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}
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/*
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* md5加密
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*/
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public static String stringToMD5(String plainText) {
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byte[] secretBytes = null;
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try {
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secretBytes = MessageDigest.getInstance("md5").digest(
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plainText.getBytes());
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} catch (NoSuchAlgorithmException e) {
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throw new RuntimeException("没有这个md5算法！");
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}
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String md5code = new BigInteger(1, secretBytes).toString(16);
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for (int i = 0; i < 32 - md5code.length(); i++) {
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md5code = "0" + md5code;
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}
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return md5code;
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}
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public static String passMd5(String password) {
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String salt = "ew!.E";
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return Util.stringToMD5(password +salt);
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}
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public static void main(String[] args) {
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System.out.println(Util.passMd5("admin"));
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//java.util.Date date = new java.util.Date();
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//SimpleDateFormat dateFormat= new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
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//System.out.println(dateFormat.format(date));
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}
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}
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