使用Java通过OAuth协议验证发送微博的教程

package weibo4j.examples; 
import weibo4j.Status; 
import weibo4j.Weibo; 
import weibo4j.WeiboException; 
import weibo4j.http.AccessToken; 
import weibo4j.http.RequestToken; 
import java.io.UnsupportedEncodingException; 
// Web 方式认证 
public class WebOAuth { 
  private Weibo weibo; 
  public WebOAuth(){    
    // 准备好Consumer Key、Consumer Secret 
    // 对应于新浪微博应用就是申请到的 App key 和 Secret key 
    System.setProperty("weibo4j.oauth.consumerKey", Weibo.CONSUMER_KEY); 
    System.setProperty("weibo4j.oauth.consumerSecret", Weibo.CONSUMER_SECRET); 
    weibo = new Weibo(); 
  } 
  // 根据传入的 callback_url 获取 request token 
  public RequestToken getRequestToken(String backUrl) { 
    try { 
      // 指定 callback_url 并获得 request token 
      RequestToken requestToken = weibo.getOAuthRequestToken(backUrl); 
      System.out.println("Request token: " + requestToken.getToken()); 
      System.out.println("Request token secret: " + requestToken.getTokenSecret()); 
      return requestToken; 
    } catch (Exception e) { 
      System.out.println("获取Request token发生异常！"); 
      e.printStackTrace(); 
      return null; 
    } 
  } 
  // 根据传入的 request token 和 verifier 获取 access token 
  public AccessToken gettAccessToken(RequestToken requestToken, String verifier) { 
    try {      
      AccessToken accessToken = weibo.getOAuthAccessToken(requestToken 
          .getToken(), requestToken.getTokenSecret(), verifier); 
      System.out.println("Access token: " + accessToken.getToken()); 
      System.out.println("Access token secret: " + accessToken.getTokenSecret()); 
      return accessToken; 
    } catch (Exception e) { 
      System.out.println("获取Access token发生异常！"); 
      e.printStackTrace(); 
      return null; 
    } 
  } 
  // 根据传入的 Access Token 和内容发表微博 
  public void update(AccessToken access, String content) { 
    try { 
      weibo.setToken(access.getToken(), access.getTokenSecret()); 
      content = new String(content.getBytes("GBK"), "UTF-8"); 
      Status status = weibo.updateStatus(content); 
      System.out.println("成功发表微博：" + status.getText() + "."); 
    } catch (UnsupportedEncodingException e) { 
      System.out.println("微博内容转编码发生异常！"); 
      e.printStackTrace(); 
    } catch (WeiboException e) { 
      System.out.println("发表微博发生异常！"); 
      e.printStackTrace(); 
    } 
  } 
} 
request.jsp，用于提供 callback_url（这里我们自定义为下文中的callback.jsp），当获取得到RequestToken之后，保存该RequestToken到Session中，并将页面重定向到callback.jsp进行验证、授权。
<%@ page contentType="text/html;charset=utf-8" %> 
<%@ page language="java" import="weibo4j.*" %> 
<%@ page language="java" import="weibo4j.http.*" %> 
<%@ page language="java" import="weibo4j.util.*" %> 
<jsp:useBean id="weboauth" scope="session" class="weibo4j.examples.WebOAuth" /> 
<% 
  if("1".equals(request.getParameter("opt"))) 
  { 
    // 传入callback_url 
    String callback_url = "http://localhost:8080/sinaweibo/callback.jsp"; 
    RequestToken requestToken = weboauth.getRequestToken(callback_url); 
    if(requestToken != null){ 
      out.println(requestToken.getToken()); 
      out.println(requestToken.getTokenSecret()); 
      session.setAttribute("requestToken",requestToken); 
      String url = requestToken.getAuthorizationURL()+"&oauth_callback="+callback_url; 
      System.out.println("AuthorizationURL:" + url); 
      //BareBonesBrowserLaunch.openURL(callback_url); 
      //response.sendRedirect(requestToken.getAuthorizationURL()); 
      // 重定向到附加了callback_url回调地址的sina微博认证页面 
      response.sendRedirect(url); 
    }else{ 
      out.println("request error"); 
    } 
  }else{ 
%> 
    <a href="request.jsp?opt=1">请点击进行Web方式的OAuth认证！</a>  
<% }  %> 

<%@ page contentType="text/html;charset=utf-8" %> 
<%@ page language="java" import="weibo4j.http.*" %> 
<%@ page language="java" import="weibo4j.*" %> 
<jsp:useBean id="weboauth" scope="session" class="weibo4j.examples.WebOAuth" /> 
<% 
  // 获得HTTP请求中的 oauth_verifier 参数 
  String verifier=request.getParameter("oauth_verifier"); 
  out.println("oauth_verifier:"+verifier); 
  System.out.println("oauth_verifier:"+verifier); 
  if(verifier != null){ 
    RequestToken requestToken = (RequestToken)session.getAttribute("requestToken"); 
    if(requestToken != null){ 
      AccessToken accessToken = weboauth.gettAccessToken(requestToken,verifier); 
      if(accessToken != null){ 
        try{ 
          session.setAttribute("accessToken",accessToken);           
          out.println("5 秒后转到 writeWeibo.html"); 
          Thread.sleep(5000); 
          response.sendRedirect("http://localhost:8080/sinaweibo/writeWeibo.html"); 
        }catch(Exception e){ 
          e.printStackTrace(); 
        }        
      }else{ 
        out.println("access token request error"); 
      }    
    }else{ 
      out.println("request token session error"); 
    } 
  }else{ 
    out.println("verifier String error"); 
  } 
%> 
writeWeibo.html，很简单的HTML文件。
<html> 
  <head><title>发布sina微博</title></head> 
  <body bgcolor="#d0d0d0" > 
    <form action="updateWeibo.jsp" method="post">  
      请在这里写上140字符以内的文本：</br> 
      <textarea name="weiboText" rows="3" cols="30">测试新浪微博！</textarea></br> 
      <input type="submit" value="发布"> 
      <input type="reset" value="清除"></br> 
    </form> 
  </body> 
</html> 
updateWeibo.jsp，用于发表文本微博，即调用WebOAuth.java 中的update方法。
<%@ page contentType="text/html;charset=utf-8" %> 
<%@ page language="java" import="weibo4j.http.*" %> 
<%@ page language="java" import="weibo4j.*" %> 
<jsp:useBean id="weboauth" scope="session" class="weibo4j.examples.WebOAuth" /> 
<% 
  AccessToken accessToken = (AccessToken)session.getAttribute("accessToken"); 
  String weiboText = (String)request.getParameter("weiboText"); 
  // 连续发表同样的微博内容会返回400错误 
  weboauth.update(accessToken, weiboText); 
  out.println("微博发表成功！"); 
%>