Java模拟POST表单提交HttpClient操作

public static void Login() {

String url = "http://www.***.com/login";

PostMethod postMethod = new PostMethod(url);

// 填入各个表单域的值

NameValuePair[] data = {

new NameValuePair("account", "yijianfeng_vip@163.com"),

new NameValuePair("nextUrl", ""),

new NameValuePair("lcallback", ""),

new NameValuePair("password ", "******"),

new NameValuePair("persistent", "1"), };

// 将表单的值放入postMethod中

postMethod.setRequestBody(data);

// 执行postMethod

int statusCode = 0;

try {

statusCode = httpClient.executeMethod(postMethod);

} catch (HttpException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

// 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

// 301或者302

if (statusCode == HttpStatus.SC_MOVED_PERMANENTLY

|| statusCode == HttpStatus.SC_MOVED_TEMPORARILY) {

// 从头中取出转向的地址

Header locationHeader = postMethod.getResponseHeader("location");

String location = null;

if (locationHeader != null) {

location = locationHeader.getValue();

System.out.println("diandianLogin:" + location);

} else {

System.err.println("Location field value is null.");

}

return;

} else {

System.out.println(postMethod.getStatusLine());

String str = "";

try {

str = postMethod.getResponseBodyAsString();

} catch (IOException e) {

e.printStackTrace();

}

System.out.println(str);

}

postMethod.releaseConnection();

return;

}

其中需要的jar包：

1、 commons-httpclient.jar

2、commons-codec.jar

3、commons-logging.jar

今天开发时，遇到利用Java中HttpClient类以POST方式提交数据，目标收到后中文乱码问题。
请求端代码：

Java代码


/**

* HttpClient提交参数

* @author sunyunfang@126.com

*/

public static void main(String[] args) throws IOException {

HttpClient client = new HttpClient();

client.getHostConfiguration().setHost("127.0.0.1", 8081, "http");

// 使用POST方式提交数据

HttpMethod method = getPostMethod();

client.executeMethod(method);

// 打印服务器返回的状态

System.out.println(method.getStatusLine());

// 打印结果页面

String response = new String(method.getResponseBodyAsString().getBytes("8859_1"));

// 打印返回的信息

System.out.println(response);

method.releaseConnection();

}

// 使用POST方式提交数据

private static HttpMethod getPostMethod() {

String url = "/PushServer/notification.do?action=sendOneMsg";

NameValuePair message = new NameValuePair("message", "消息内容。");

post.setRequestBody(new NameValuePair[]{message});

return post;

}

// 使用GET方式提交数据

private static HttpMethod getGetMethod() {

return new GetMethod("/PushServer/notification.do?action=sendOneMsg&message=abcd");

}

目标端代码：

Java代码


/**

* 供MsgServer远程调用

* @param request

* @param response

* @return

* @throws Exception

* @author SunYunfang@126.com

*/

public ModelAndView sendOneMsg(HttpServletRequest request,

HttpServletResponse response) throws Exception {

String message = ServletRequestUtils.getStringParameter(request, "message");

}

这段代码执行后，目标能收到信息，但是中文乱码，也没有找到转码的方法。

经分析，原来使用 NameValuePair 加入的HTTP请求的参数最终都会转化为 RequestEntity
提交到HTTP服务器。接着在PostMethod的父类 EntityEnclosingMethod
中发现，只要重载getRequestCharSet()方法就能设置提交的编码(字符集)。

修正后：

Java代码


/**

* HttpClient提交参数

* @author SunYunfang@126.com

*/

public static void main(String[] args) throws IOException {

HttpClient client = new HttpClient();

client.getHostConfiguration().setHost("127.0.0.1", 8081, "http");

// 使用POST方式提交数据

HttpMethod method = getPostMethod();

client.executeMethod(method);

// 打印服务器返回的状态

System.out.println(method.getStatusLine());

// 打印结果页面

String response = new String(method.getResponseBodyAsString().getBytes("8859_1"));

// 打印返回的信息

System.out.println(response);

method.releaseConnection();

}

// 使用POST方式提交数据

private HttpMethod getPostMethod() {

String url = "/PushServer/notification.do?action=sendOneMsg";

PostMethod post = new UTF8PostMethod(url);

NameValuePair message = new NameValuePair("message", "消息内容。");

post.setRequestBody(new NameValuePair[]{message});

return post;

}

//Inner class for UTF-8 support

public static class UTF8PostMethod extends PostMethod{

public UTF8PostMethod(String url){

super(url);

}

@Override

public String getRequestCharSet() {

//return super.getRequestCharSet();

return "UTF-8";

}

}

// 使用GET方式提交数据

private static HttpMethod getGetMethod() {

return new GetMethod("/PushServer/notification.do?action=sendOneMsg&message=abcd");

}