微信开发之使用java获取签名signature

一、前言

微信接口调用验证最终需要用到的三个参数noncestr、timestamp、signature：

接下来将会给出获取这三个参数的详细代码
本文的环境eclipse + maven
本文使用到的技术httpclient、json字符串转map、sha1加密

二、需要用到的jar包

maven依赖的包有：

1、httpclient包依赖

<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>

2、json转map相关包依赖

<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>

三、运行结果

四、详细代码

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;
 }
}

五、工程下载

更多精彩内容请点击《android微信开发教程汇总》，《java微信开发教程汇总》欢迎大家学习阅读。

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