一、獲取code
我們提供的服務(wù)有：成都做網(wǎng)站、網(wǎng)站設(shè)計(jì)、外貿(mào)營銷網(wǎng)站建設(shè)、微信公眾號開發(fā)、網(wǎng)站優(yōu)化、網(wǎng)站認(rèn)證、維西ssl等。為近1000家企事業(yè)單位解決了網(wǎng)站和推廣的問題。提供周到的售前咨詢和貼心的售后服務(wù)，是有科學(xué)管理、有技術(shù)的維西網(wǎng)站制作公司
將code作為參數(shù)傳遞過來
//如果有code，說明是微信小程序，根據(jù)code獲取openId
//classify用于標(biāo)識是哪個小程序
if (!CheckUtil.checkNulls( keUser.getCode(),keUser.getClassify())){
//
String openid = OpenIdUtil.oauth2GetOpenid(keUser.getCode(),keUser.getClassify());
printParamsLog(openid, logger);
keUser.setUserId(openid);
}1234567812345678
二、工具類
package com.util;
import net.sf.json.JSONObject;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;
import java.util.HashMap;
import java.util.Map;
/**
* @author xsx
*/
public class OpenIdUtil {
public static String oauth2GetOpenid(String code,String classify) {
String appid="";
String appsecret="";
switch (classify){
case "1":
//自己的配置appid
appid = "**********";
//自己的配置APPSECRET;
appsecret = "**********";
break;
case "2":
appid = "**********";
appsecret = "************";
break;
case "3":
appid = "**********";
appsecret = "************";
break;
case "4":
appid = "**********";
appsecret = "************";
break;
case "5":
appid = "**********";
appsecret = "************";
}
//授權(quán)（必填）
String grant_type = "authorization_code";
//URL
String requestUrl = "";
//請求參數(shù)
String params = "appid=" + appid + "secret=" + appsecret + "js_code=" + code + "grant_type=" + grant_type;
//發(fā)送請求
String data = HttpUtil.get(requestUrl, params);
//解析相應(yīng)內(nèi)容（轉(zhuǎn)換成json對象）
JSONObject json = JSONObject.fromObject(data);
//用戶的唯一標(biāo)識（openid）
String Openid =String.valueOf(json.get("openid"));
//System.out.println(Openid);
return Openid;
}
}
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三、發(fā)送請求的工具類
package com.util;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java點(diǎn)虐 .URL;
import java點(diǎn)虐 .URLConnection;
import java.util.List;
import java.util.Map;
/**
* @author xsx
*/
public class HttpUtil {
/**
* 向指定URL發(fā)送GET方法的請求
*
* @param url
* 發(fā)送請求的URL
* @param param
* 請求參數(shù)，請求參數(shù)應(yīng)該是 name1=value1name2=value2 的形式。
* @return String 所代表遠(yuǎn)程資源的響應(yīng)結(jié)果
*/
public static String get(String url,String param){
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
//System.out.println(urlNameString);
URL realUrl = new URL(urlNameString);
// 打開和URL之間的連接
URLConnection connection = realUrl.openConnection();
// 設(shè)置通用的請求屬性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立實(shí)際的連接
connection.connect();
// 獲取所有響應(yīng)頭字段
MapString, ListString map = connection.getHeaderFields();
// 遍歷所有的響應(yīng)頭字段
/*for (String key : map.keySet()) {
System.out.println(key + "---" + map.get(key));
}*/
// 定義 BufferedReader輸入流來讀取URL的響應(yīng)
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("發(fā)送GET請求出現(xiàn)異常！" + e);
e.printStackTrace();
}
// 使用finally塊來關(guān)閉輸入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
}
package com.cube.limail.util;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;/**
* 加密解密類
*/
public class Eryptogram
{
private static String Algorithm ="DES";
private String key="CB7A92E3D3491964";
//定義 加密算法,可用 DES,DESede,Blowfish
static boolean debug = false ;
/**
* 構(gòu)造子注解.
*/
public Eryptogram ()
{
} /**
* 生成密鑰
* @return byte[] 返回生成的密鑰
* @throws exception 扔出異常.
*/
public static byte [] getSecretKey () throws Exception
{
KeyGenerator keygen = KeyGenerator.getInstance (Algorithm );
SecretKey deskey = keygen.generateKey ();
System.out.println ("生成密鑰:"+bytesToHexString (deskey.getEncoded ()));
if (debug ) System.out.println ("生成密鑰:"+bytesToHexString (deskey.getEncoded ()));
return deskey.getEncoded ();
} /**
* 將指定的數(shù)據(jù)根據(jù)提供的密鑰進(jìn)行加密
* @param input 需要加密的數(shù)據(jù)
* @param key 密鑰
* @return byte[] 加密后的數(shù)據(jù)
* @throws Exception
*/
public static byte [] encryptData (byte [] input ,byte [] key ) throws Exception
{
SecretKey deskey = new javax.crypto.spec.SecretKeySpec (key ,Algorithm );
if (debug )
{
System.out.println ("加密前的二進(jìn)串:"+byte2hex (input ));
System.out.println ("加密前的字符串:"+new String (input ));
} Cipher c1 = Cipher.getInstance (Algorithm );
c1.init (Cipher.ENCRYPT_MODE ,deskey );
byte [] cipherByte =c1.doFinal (input );
if (debug ) System.out.println ("加密后的二進(jìn)串:"+byte2hex (cipherByte ));
return cipherByte ;
} /**
* 將給定的已加密的數(shù)據(jù)通過指定的密鑰進(jìn)行解密
* @param input 待解密的數(shù)據(jù)
* @param key 密鑰
* @return byte[] 解密后的數(shù)據(jù)
* @throws Exception
*/
public static byte [] decryptData (byte [] input ,byte [] key ) throws Exception
{
SecretKey deskey = new javax.crypto.spec.SecretKeySpec (key ,Algorithm );
if (debug ) System.out.println ("解密前的信息:"+byte2hex (input ));
Cipher c1 = Cipher.getInstance (Algorithm );
c1.init (Cipher.DECRYPT_MODE ,deskey );
byte [] clearByte =c1.doFinal (input );
if (debug )
{
System.out.println ("解密后的二進(jìn)串:"+byte2hex (clearByte ));
System.out.println ("解密后的字符串:"+(new String (clearByte )));
} return clearByte ;
} /**
* 字節(jié)碼轉(zhuǎn)換成16進(jìn)制字符串
* @param byte[] b 輸入要轉(zhuǎn)換的字節(jié)碼
* @return String 返回轉(zhuǎn)換后的16進(jìn)制字符串
*/
public static String byte2hex (byte [] b )
{
String hs ="";
String stmp ="";
for (int n =0 ;n b.length ;n ++)
{
stmp =(java.lang.Integer.toHexString (b [n ] 0XFF ));
if (stmp.length ()==1 ) hs =hs +"0"+stmp ;
else hs =hs +stmp ;
if (n b.length -1 ) hs =hs +":";
} return hs.toUpperCase ();
}
/**
* 字符串轉(zhuǎn)成字節(jié)數(shù)組.
* @param hex 要轉(zhuǎn)化的字符串.
* @return byte[] 返回轉(zhuǎn)化后的字符串.
*/
public static byte[] hexStringToByte(String hex) {
int len = (hex.length() / 2);
byte[] result = new byte[len];
char[] achar = hex.toCharArray();
for (int i = 0; i len; i++) {
int pos = i * 2;
result[i] = (byte) (toByte(achar[pos]) 4 | toByte(achar[pos + 1]));
}
return result;
}
private static byte toByte(char c) {
byte b = (byte) "0123456789ABCDEF".indexOf(c);
return b;
}
/**
* 字節(jié)數(shù)組轉(zhuǎn)成字符串.
* @param String 要轉(zhuǎn)化的字符串.
* @return 返回轉(zhuǎn)化后的字節(jié)數(shù)組.
*/
public static final String bytesToHexString(byte[] bArray) {
StringBuffer sb = new StringBuffer(bArray.length);
String sTemp;
for (int i = 0; i bArray.length; i++) {
sTemp = Integer.toHexString(0xFF bArray[i]);
if (sTemp.length() 2)
sb.append(0);
sb.append(sTemp.toUpperCase());
}
return sb.toString();
}
/**
* 從數(shù)據(jù)庫中獲取密鑰.
* @param deptid 企業(yè)id.
* @return 要返回的字節(jié)數(shù)組.
* @throws Exception 可能拋出的異常.
*/
public static byte[] getSecretKey(long deptid) throws Exception {
byte[] key=null;
String value=null;
//CommDao dao=new CommDao();
// List list=dao.getRecordList("from Key k where k.deptid="+deptid);
//if(list.size()0){
//value=((com.csc.sale.bean.Key)list.get(0)).getKey();
value = "CB7A92E3D3491964";
key=hexStringToByte(value);
//}
if (debug)
System.out.println("密鑰:" + value);
return key;
}
public String encryptData2(String data) {
String en = null;
try {
byte[] key=hexStringToByte(this.key);
en = bytesToHexString(encryptData(data.getBytes(),key));
} catch (Exception e) {
e.printStackTrace();
}
return en;
}
public String decryptData2(String data) {
String de = null;
try {
byte[] key=hexStringToByte(this.key);
de = new String(decryptData(hexStringToByte(data),key));
} catch (Exception e) {
e.printStackTrace();
}
return de;
}
} 加密使用： byte[] key=Eryptogram.getSecretKey(deptid); //獲得鑰匙（字節(jié)數(shù)組）
byte[] tmp=Eryptogram.encryptData(password.getBytes(), key); //傳入密碼和鑰匙，獲得加密后的字節(jié)數(shù)組的密碼
password=Eryptogram.bytesToHexString(tmp); //將字節(jié)數(shù)組轉(zhuǎn)化為字符串，獲得加密后的字符串密碼解密與之差不多
public?static?void?main(String[]?args)?throws?Exception?{??
String?data?=?"itxxz";??
System.out.println("字符串：itxxz");??
System.err.println("加密："+encrypt(data));??
System.err.println("解密："+decrypt(encrypt(data)));??
}
運(yùn)行結(jié)果：
由于代碼太多，可到 ?itxxz點(diǎn)抗 /a/javashili/2014/1217/encrypt_decrypt.html? 查看，注釋也比較完整，清晰易懂
按照你同學(xué)的加密算法，只對英文小寫字母進(jìn)行了加密，原文和密文的對應(yīng)關(guān)系如下：
原文：a b c d e f g h i j k l m n o p q r s t u v w x y z
密文：f g h i j k l m n o p q r s t u v w x y z { | } a b
怎么得到上述關(guān)系呢，其實(shí)是所有的字符都有一個對應(yīng)的ASCII碼，相關(guān)ASCII碼如下：
可以看到v的ASCII碼為118，+5為123，所以變?yōu)閧
97 a
98 b
99 c
100 d
101 e
102 f
103 g
104 h
105 i
106 j
107 k
108 l
109 m
110 n
111 o
112 p
113 q
114 r
115 s
116 t
117 u
118 v
119 w
120 x
121 y
122 z
123 {
124 |
125 }
下面為解密代碼
import?java.io.*;
class?FileIo2?{
public?static?void?main(String?args[])?{
//?聲明輸入流引用
FileInputStream?fis?=?null;
//?聲明輸出流引用
FileOutputStream?fos?=?null;
try?{
//?生成代表輸入流的對象
fis?=?new?FileInputStream("D:/test1.txt");
//?生成代表輸出流的對象
fos?=?new?FileOutputStream("D:/test2.txt");
//?生成一個字節(jié)數(shù)組
byte[]?buffer?=?new?byte[100];
//?調(diào)用輸入對象的read方法，讀取字節(jié)數(shù)組的數(shù)據(jù)
int?temp?=?fis.read(buffer,?0,?buffer.length);
for?(int?i?=?0;?i??temp;?i++)?{
if?(buffer[i]?=?'f'??buffer[i]?=?'z')?{
buffer[i]?-=?5;
System.out.printf("%c",?buffer[i]);
}else?if?(buffer[i]?==?'a')?{
buffer[i]?=?'y';
System.out.printf("%c",?buffer[i]);
}else?if?(buffer[i]?==?'b')?{
buffer[i]?=?'z';
System.out.printf("%c",?buffer[i]);
}else?if(buffer[i]?==?'{'){
buffer[i]?=?'v';
System.out.printf("%c",?buffer[i]);
}else?if(buffer[i]?==?'|'){
buffer[i]?=?'w';
System.out.printf("%c",?buffer[i]);
}else?if(buffer[i]?==?'}'){
buffer[i]?=?'x';
System.out.printf("%c",?buffer[i]);
}
}
//?System.out.printf("temp=%d",temp);
//?temp臨時定義用來接收read返回值類型，從而判斷寫入多少數(shù)據(jù)
fos.write(buffer,?0,?temp);
}?catch?(Exception?e)?{
System.out.println(e);
}
}
}
下面這段代碼是既有加密也有解密：
import?java.io.*;
class?FileIo2?{
public?static?void?jiemi(){
//?聲明輸入流引用
FileInputStream?fis?=?null;
//?聲明輸出流引用
FileOutputStream?fos?=?null;
try?{
//?生成代表輸入流的對象
fis?=?new?FileInputStream("D:/test1.txt");
//?生成代表輸出流的對象
fos?=?new?FileOutputStream("D:/test2.txt");
//?生成一個字節(jié)數(shù)組
byte[]?buffer?=?new?byte[100];
//?調(diào)用輸入對象的read方法，讀取字節(jié)數(shù)組的數(shù)據(jù)
int?temp?=?fis.read(buffer,?0,?buffer.length);
for?(int?i?=?0;?i??temp;?i++)?{
if?(buffer[i]?=?'f'??buffer[i]?=?'z')?{
buffer[i]?-=?5;
System.out.printf("%c",?buffer[i]);
}else?if?(buffer[i]?==?'a')?{
buffer[i]?=?'y';
System.out.printf("%c",?buffer[i]);
}else?if?(buffer[i]?==?'b')?{
buffer[i]?=?'z';
System.out.printf("%c",?buffer[i]);
}else?if(buffer[i]?==?'{'){
buffer[i]?=?'v';
System.out.printf("%c",?buffer[i]);
}else?if(buffer[i]?==?'|'){
buffer[i]?=?'w';
System.out.printf("%c",?buffer[i]);
}else?if(buffer[i]?==?'}'){
buffer[i]?=?'x';
System.out.printf("%c",?buffer[i]);
}
}
//?System.out.printf("temp=%d",temp);
//?temp臨時定義用來接收read返回值類型，從而判斷寫入多少數(shù)據(jù)
fos.write(buffer,?0,?temp);
}?catch?(Exception?e)?{
System.out.println(e);
}
}
public?static?void?jiami(){
//?聲明輸入流引用
FileInputStream?fis?=?null;
//?聲明輸出流引用
FileOutputStream?fos?=?null;
try?{
//?生成代表輸入流的對象
fis?=?new?FileInputStream("D:/test.txt");
//?生成代表輸出流的對象
fos?=?new?FileOutputStream("D:/test1.txt");
//?生成一個字節(jié)數(shù)組
byte[]?buffer?=?new?byte[100];
//?調(diào)用輸入對象的read方法，讀取字節(jié)數(shù)組的數(shù)據(jù)
int?temp?=?fis.read(buffer,?0,?buffer.length);
for?(int?i?=?0;?i??temp;?i++)?{
if?(buffer[i]?=?'a'??buffer[i]?=?'x')?{
buffer[i]?+=?5;
//?buffer[i]--;
System.out.printf("%c",?buffer[i]);
}
if?(buffer[i]?==?'y')?{
buffer[i]?=?'a';
System.out.printf("%c",?buffer[i]);
}
if?(buffer[i]?==?'z')?{
buffer[i]?=?'b';
System.out.printf("%c",?buffer[i]);
}
}
//?System.out.printf("temp=%d",temp);
//?temp臨時定義用來接收read返回值類型，從而判斷寫入多少數(shù)據(jù)
fos.write(buffer,?0,?temp);
}?catch?(Exception?e)?{
System.out.println(e);
}
}
public?static?void?main(String?args[])?{
jiami();//先加密
jiemi();//再解密
}
}
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