java内部调用action(转)

在Java程序中可以直接调用jsp、Struts Action等网络资源，示例代码：

Java代码 
1.String title = "这是标题";  
2.String url_str = "http://127.0.0.1:8080/struts/login.do?title=";  
3.URL url = new URL(url_str+title);  
4.HttpURLConnection connection = (HttpURLConnection) url.openConnection();  
5.connection.connect();  
6.int code = connection.getResponseCode();  
7.log.info("code========" + code); 
String title = "这是标题";
String url_str = "http://127.0.0.1:8080/struts/login.do?title=";
URL url = new URL(url_str+title);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.connect();
int code = connection.getResponseCode();
log.info("code========" + code);注意：若不调用如下代码，则不能调用成功



Java代码 
1.int code = connection.getResponseCode(); 
int code = connection.getResponseCode();


转载资料1：

Java代码 
1.//java如何通过url调用远程接口并读取返回信息?  
2.        String ticket = "";//登录凭证  
3.        String url_str = "http://www.sina.com.cn?ticket=";//获取用户认证的帐号URL  
4.        String ticket_url = url_str + ticket;  
5.        URL url = new URL(ticket_url);  
6.        HttpURLConnection connection = (HttpURLConnection) url.openConnection();  
7.        connection.connect();  
8. 
9.        int code = connection.getResponseCode();  
10.        if (code == 404) {  
11.            throw new Exception("认证无效，找不到此次认证的会话信息！");  
12.        }  
13.        if (code == 500) {  
14.            throw new Exception("认证服务器发生内部错误！");  
15.        }  
16.        if (code != 200) {  
17.            throw new Exception("发生其它错误，认证服务器返回 " + code);  
18.        }  
19.        InputStream is = connection.getInputStream();  
20.        byte[] response = new byte[is.available()];  
21.        is.read(response);  
22.        is.close();  
23.        if (response == null || response.length == 0) {  
24.            throw new Exception("认证无效，找不到此次认证的会话信息！");  
25.        }  
26.        String userId = new String(response, "GBK");  
27.        System.out.println(userId); 
//java如何通过url调用远程接口并读取返回信息?
        String ticket = "";//登录凭证
        String url_str = "http://www.sina.com.cn?ticket=";//获取用户认证的帐号URL
        String ticket_url = url_str + ticket;
        URL url = new URL(ticket_url);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.connect();

        int code = connection.getResponseCode();
        if (code == 404) {
            throw new Exception("认证无效，找不到此次认证的会话信息！");
        }
        if (code == 500) {
            throw new Exception("认证服务器发生内部错误！");
        }
        if (code != 200) {
            throw new Exception("发生其它错误，认证服务器返回 " + code);
        }
        InputStream is = connection.getInputStream();
        byte[] response = new byte[is.available()];
        is.read(response);
        is.close();
        if (response == null || response.length == 0) {
            throw new Exception("认证无效，找不到此次认证的会话信息！");
        }
        String userId = new String(response, "GBK");
        System.out.println(userId);


转载资料2：



Java代码 
1. URL u = new URL( url );  
2.  URLConnection uc = u.openConnection();  
3.  HttpURLConnection httpUC = (HttpURLConnection)uc;  
4.//   设置是否向httpUrlConnection输出，因为这个是post请求，参数要放在http正文内，因此需要设为true, 默认情况下是false;  
5.  httpUC.setDoOutput( true );  
6.//   Post 请求不能使用缓存  
7.  httpUC.setUseCaches(false);  
8.    
9.//  增加更多的请求头信息  
10.  Iterator<String> it = requestHeads.keySet().iterator();  
11.  while( it.hasNext() ){  
12.   String name = it.next(); String value = requestHeads.get( name );  
13.   httpUC.addRequestProperty( name , value );  
14.  }  
15.    
16.//   设定传送的内容类型是可序列化的java对象  
17.//   (如果不设此项,在传送序列化对象时,当WEB服务默认的不是这种类型时可能抛java.io.EOFException)  
18.  httpUC.setRequestProperty("Content-type", "application/x-java-serialized-object");  
19.//  设定请求的方法为"POST"，默认是GET  
20.  httpUC.setRequestMethod("POST");  
21.    
22.//   连接，上面的配置必须要在connect之前完成. 不知道是否要连接池??? rhwang 2009-02-27  
23.        httpUC.connect();  

转自:http://xucunliang.iteye.com/blog/788838