微信开发之使用java获取签名signature

<dependency>
 <groupId>org.apache.httpcomponents</groupId>
 <artifactId>httpcore</artifactId>
 <version>4.4.3</version>
</dependency>
<dependency>
 <groupId>org.apache.httpcomponents</groupId>
 <artifactId>httpclient</artifactId>
 <version>4.5.1</version>
</dependency>

<dependency> 
 <groupId>net.sf.json-lib</groupId> 
 <artifactId>json-lib</artifactId> 
 <version>2.4</version> 
 <classifier>jdk15</classifier> 
</dependency>
<dependency>
 <groupId>xom</groupId>
 <artifactId>xom</artifactId>
 <version>1.2.5</version>
</dependency>

package com.luo.util;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.UUID;
import net.sf.json.JSONObject;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

public class HttpXmlClient {

 public static String post(String url, Map<String, String> params) {
 DefaultHttpClient httpclient = new DefaultHttpClient();
 String body = null;
 HttpPost post = postForm(url, params);
 body = invoke(httpclient, post);
 httpclient.getConnectionManager().shutdown();
 return body;
 }

 public static String get(String url) {
 DefaultHttpClient httpclient = new DefaultHttpClient();
 String body = null;
 HttpGet get = new HttpGet(url);
 body = invoke(httpclient, get);
 httpclient.getConnectionManager().shutdown();
 return body;
 }

 private static String invoke(DefaultHttpClient httpclient,
  HttpUriRequest httpost) {
 HttpResponse response = sendRequest(httpclient, httpost);
 String body = paseResponse(response);
 return body;
 }

 private static String paseResponse(HttpResponse response) {
 HttpEntity entity = response.getEntity();
 String charset = EntityUtils.getContentCharSet(entity);
 String body = null;
 try {
  body = EntityUtils.toString(entity);
 } catch (ParseException e) {
  e.printStackTrace();
 } catch (IOException e) {
  e.printStackTrace();
 }
 return body;
 }

 private static HttpResponse sendRequest(DefaultHttpClient httpclient,
  HttpUriRequest httpost) {
 HttpResponse response = null;
 try {
  response = httpclient.execute(httpost);
 } catch (ClientProtocolException e) {
  e.printStackTrace();
 } catch (IOException e) {
  e.printStackTrace();
 }
 return response;
 }

 private static HttpPost postForm(String url, Map<String, String> params) {

 HttpPost httpost = new HttpPost(url);
 List<NameValuePair> nvps = new ArrayList<NameValuePair>();

 Set<String> keySet = params.keySet();
 for (String key : keySet) {
  nvps.add(new BasicNameValuePair(key, params.get(key)));
 }

 try {
  httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
 } catch (UnsupportedEncodingException e) {
  e.printStackTrace();
 }

 return httpost;
 }

 public static void main(String[] args) {
 //获取access_token
 Map<String, String> params = new HashMap<String, String>();
 params.put("corpid","wx5f24fa0db1819ea2");
 params.put("corpsecret","uQtWzF0bQtl2KRHX0amekjpq8L0aO96LSpSNfctOBLRbuYPO4DUBhMn0_v2jHS-9");
 String xml = HttpXmlClient.post("https://qyapi.weixin.qq.com/cgi-bin/gettoken",params);
 JSONObject jsonMap = JSONObject.fromObject(xml);
 Map<String, String> map = new HashMap<String, String>();
 Iterator<String> it = jsonMap.keys(); 
 while(it.hasNext()) { 
  String key = (String) it.next(); 
  String u = jsonMap.get(key).toString();
  map.put(key, u); 
 }
 String access_token = map.get("access_token");
 System.out.println("access_token=" + access_token);

 //获取ticket
 params.put("access_token",access_token);
 xml = HttpXmlClient.post("https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket",params); 
 jsonMap = JSONObject.fromObject(xml);
 map = new HashMap<String, String>();
 it = jsonMap.keys(); 
 while(it.hasNext()) { 
  String key = (String) it.next(); 
  String u = jsonMap.get(key).toString();
  map.put(key, u); 
 }
 String jsapi_ticket = map.get("ticket");
 System.out.println("jsapi_ticket=" + jsapi_ticket);

 //获取签名signature
 String noncestr = UUID.randomUUID().toString();
 String timestamp = Long.toString(System.currentTimeMillis() / 1000);
 String url="http://mp.weixin.qq.com";
 String str = "jsapi_ticket=" + jsapi_ticket +
  "&noncestr=" + noncestr +
  "&timestamp=" + timestamp +
  "&url=" + url;
 //sha1加密
 String signature = SHA1(str);
 System.out.println("noncestr=" + noncestr);
 System.out.println("timestamp=" + timestamp);
 System.out.println("signature=" + signature);
 //最终获得调用微信js接口验证需要的三个参数noncestr、timestamp、signature
 }

 /** 
 * @author：罗国辉 
 * @date： 2015年12月17日 上午9:24:43 
 * @description： SHA、SHA1加密
 * @parameter： str：待加密字符串
 * @return： 加密串
 **/
 public static String SHA1(String str) {
 try {
  MessageDigest digest = java.security.MessageDigest
   .getInstance("SHA-1"); //如果是SHA加密只需要将"SHA-1"改成"SHA"即可
  digest.update(str.getBytes());
  byte messageDigest[] = digest.digest();
  // Create Hex String
  StringBuffer hexStr = new StringBuffer();
  // 字节数组转换为 十六进制 数
  for (int i = 0; i < messageDigest.length; i++) {
  String shaHex = Integer.toHexString(messageDigest[i] & 0xFF);
  if (shaHex.length() < 2) {
   hexStr.append(0);
  }
  hexStr.append(shaHex);
  }
  return hexStr.toString();

 } catch (NoSuchAlgorithmException e) {
  e.printStackTrace();
 }
 return null;
 }
}