关于使用环信web-im实现登录（直接登录）

1，去环信官网下载个WEB-IM

我用的是V1.4.11版本，当时还没有出12嘛，所以12也没研究，不过应该变动不大。

2， 将项目解压到你的web项目中的WebRoot下，更换掉appKey即可。（在web-im/demo/javascript/dist/webim.config.js里）

3，在web-im下创建一个html文件。

4，引入标签

<script src="../web-im/demo/javascript/dist/webim.config.js"></script><script src='../web-im/sdk/dist/strophe-1.2.8.min.js'></script><script src='../web-im/webrtc/dist/webrtc-1.4.11.js'></script><script src='../web-im/sdk/dist/websdk-1.4.11.js'></script><script type="text/javascript" src="../static/js/jquery-1.7.2.js"></script>

5，写一个ajax来实现登录

$(function () {$.ajax({      type:"post",      url:getRootPath()+"/hx/toHx",  //建议使用绝对路径    data:{     },      cache: false,      dataType:"json",      success:function(data){      var username= data.username;var password= data.password;    var conn = new WebIM.connection({       https: WebIM.config.https,       url: WebIM.config.xmppURL,       isAutoLogin: WebIM.config.isAutoLogin,       isMultiLoginSessions: WebIM.config.isMultiLoginSessions    });    var encryptUsername = btoa(username);    encryptUsername = encryptUsername.replace(/=*$/g, "");    var options = {       apiUrl: WebIM.config.apiURL,       user: username,       pwd: password,       appKey: WebIM.config.appkey,       success: function (token) {           var token = token.access_token;           WebIM.utils.setCookie('webim_' + encryptUsername, token, 1);          location.href=getRootPath()+"/web-im/index.html#username="+encryptUsername;       },       error: function(){       }    };    conn.open(options);   }  });  });

这样，跳转到这个文件路径的时候就会直接登录了，后台只需把用户名和密码参数传过来即可。

下面加一个环信注册的方法：

/*** 授权注册* @return* @throws HttpException* @throws IOException*/public static String addUsers(String username,String password) throws HttpException, IOException{client = new HttpClient();PostMethod postMethod = new PostMethod("https://a1.easemob.com/"+org_name+"/"+app_name+"/users");postMethod.getParams().setParameter(HttpClientParams.HTTP_CONTENT_CHARSET,"UTF-8");postMethod.getParams().setBooleanParameter(HttpClientParams.USE_EXPECT_CONTINUE,false);postMethod.getParams().setParameter(HTTP.CONN_DIRECTIVE, HTTP.CONN_CLOSE);postMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER,  new DefaultHttpMethodRetryHandler());//设置requestHeaderpostMethod.setRequestHeader("Content-Type", "application/json");postMethod.setRequestHeader("Authorization", getOpenCode());// 填入各个表单域的值  JSONObject jsonObject = new JSONObject();jsonObject.put("username", username);jsonObject.put("password", password);String transJson = jsonObject.toString();RequestEntity se = new StringRequestEntity(transJson, "application/json", "UTF-8");postMethod.setRequestEntity(se);client.executeMethod(postMethod);//接收返回参数StringBuffer contentBuffer = new StringBuffer();//返回的数据InputStream ein = postMethod.getResponseBodyAsStream();BufferedReader reader = new BufferedReader(new InputStreamReader(ein,postMethod.getResponseCharSet()));String inputLine = null;while((inputLine = reader.readLine()) != null){contentBuffer.append(inputLine);}String code = postMethod.getStatusLine().toString();    //打印服务器返回的状态  ein.close();postMethod.releaseConnection();String con = contentBuffer.toString();System.out.println(DateUtil.getTime()+"--"+code);  System.out.println("con:"+con);return code;}