研究了一个下午终于实现了，自动百度blog添加文章。

 1public class LoginTo
 2{
 3   
 4
 5    public static void main(String[] args) throws Exception {
 6
 7        HttpClient httpClient=new HttpClient();
 8        String url = "http://passport.baidu.com/?login&tpl=sp&tpl_reg=sp";
 9        PostMethod postMethod = new PostMethod(url);
10//         填入各个表单域的值
11        NameValuePair[] data = { new NameValuePair("username", "username"),                
12        new NameValuePair("password", "password") };
13//         将表单的值放入postMethod中
14        postMethod.setRequestBody(data);
15//         执行postMethod
16        int statusCode = httpClient.executeMethod(postMethod);
17//         HttpClient对于要求接受后继服务的请求，象POST和PUT等不能自动处理转发
18//         301或者302
19        if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY || 
20        statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {
21            // 从头中取出转向的地址
22            Header locationHeader = postMethod.getResponseHeader("location");
23            String location = null;
24            if (locationHeader != null) {
25             location = locationHeader.getValue();
26             System.out.println("The page was redirected to:" + location);
27             postMethod.releaseConnection();
28             
29             GetMethod get=new GetMethod("http://passport.baidu.com/"+location);
30             statusCode = httpClient.executeMethod(get);
31             System.out.print(get.getStatusText());
32             if (statusCode != HttpStatus.SC_OK) {
33               System.err.println("Method failed: " + get.getStatusLine());
34             }else{
35                 /**//*
36                 InputStreamReader isr=new InputStreamReader(get.getResponseBodyAsStream(),"GBK");
37                 int d=0;
38                 while((d=isr.read())!=-1){
39                     System.out.print((char)d);
40                 }
41                 //成功登陆了百度
42                  
43                 */
44                 get.releaseConnection();
45                 ////////////////////////////进行发布文章
46                 postMethod=new PostMethod("http://hi.baidu.com/amushen/commit");
47                 NameValuePair[] data1={new NameValuePair("ct","1"),
48                                         new NameValuePair("cm","1"),
49                                         new NameValuePair("spBlogTitle","testcharset"),
50                                         new NameValuePair("spBlogText",new String("测试汉字测试汉字".getBytes(),"GBK")),
51                                         new NameValuePair("spBlogCatName","Diary"),
52                                         new NameValuePair("spIsCmtAllow","0"),
53                                         new NameValuePair("spBlogPower","3")
54                                         
55                 };
56                 postMethod.removeRequestHeader("Content-Type");
57                 Header setHeader = new Header("Content-Type", "text/html; charset=GBK");
58                 postMethod.addRequestHeader(setHeader);
59                 postMethod.setRequestBody(data1);
60                 httpClient.executeMethod(postMethod);
61                 System.out.print("public:"+postMethod.getStatusLine());
62                 System.out.println("|");
63                 InputStreamReader isr=new InputStreamReader(postMethod.getResponseBodyAsStream(),"GBK");
64                 int d=0;
65                 while((d=isr.read())!=-1){
66                     System.out.print((char)d);
67                 }
68                 postMethod.releaseConnection();
69                 
70                 
71                 
72                 
73             }
74             
75
76            } else {
77             System.err.println("Location field value is null.");
78            }
79            return;
80        }
81
82        postMethod.releaseConnection();
83        
84    
85    }
86}
87

使用了httpclient组件。感觉好复杂啊