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发送Post请求,内容格式为xml,并获取响应内容.doc
ChannelDistributor.xml 内容如下：
yisou
abcd1234
10010000
00
1).HttpClient 发送 Post 请求,内容格式为 xml,并获取响应内容
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.StringRequestEntity;
import org.apache.log4j.Logger;
public class ServiceValidate extends HttpServlet{
private Logger log = Logger.getLogger(ServiceValidate.class);
private static final long serialVersionUID = -6995391540735187530L;
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
this.doPost(req, resp);
}
/**
* 发送 xml 数据请求到服务器端
* @param url xml 请求数据地址
* @param xmlString 发送的 xml 数据流
* @return null 发送失败，否则返回响应内容
*/
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse
resp)
throws ServletException, IOException {
System.setProperty("org.apache.commons.logging.Log",
"org.apache.commons.logging.impl.SimpleLog");
System.setProperty("org.apache.commons.logging.simplel
og.showdatetime", "true");
System.setProperty("org.apache.commons.logging.simplel
og.log.org.apache.commons.httpclient", "stdout");
String url = "http://localhost:8080/game/testServlet";
String xmlString = getXmlString();
HttpClient client = new HttpClient();
PostMethod myPost = new PostMethod(url);
client.getParams().setSoTimeout(300*1000);
String responseString = null;
try{
myPost.setRequestEntity(new
StringRequestEntity(xmlString,"text/xml","utf-8"));
client.executeMethod(myPost);
int statusCode =
if(statusCode == HttpStatus.SC_OK){
BufferedInputStream bis = new
BufferedInputStream(myPost.getResponseBodyAsStream());
ByteArrayOutputStream();
-1){
byte[] bytes = new byte[1024];
ByteArrayOutputStream bos = new
int count = 0;
while((count = bis.read(bytes))!=
bos.write(bytes, 0, count);
}
byte[] strByte = bos.toByteArray();
responseString = new
String(strByte,0,strByte.length,"utf-8");
bos.close();
bis.close();
}
}catch (Exception e) {
log.error(e.getMessage(), e);
}
myPost.releaseConnection();
client.getHttpConnectionManager().closeIdleConnections
System.out.println("responseString:"+responseString);
(0);
}
/**
* 读取 xml 内容,将请求的 xml
* 保存成字符串 进行 post 发送
* @return
*/
private String getXmlString() {
StringBuilder sb=new StringBuilder();
try {
InputStream inputStream
=ServiceValidate.class.getResourceAsStream("/ChannelDistributor.xml");
BufferedReader br=new BufferedReader(new
InputStreamReader(inputStream));
String line="";
for(line=br.readLine();line!=null;line=br.read
Line()) {
sb.append(line+"\n");
}
} catch (FileNotFoundException e) {
log.error(e.getMessage(), e);
} catch (IOException e) {
log.error(e.getMessage(), e);
}
return sb.toString();
}
@Override
protected void doPut(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
this.doPost(req, resp);
}
}
2).获取 HttpClient Post 请求数据并响应内容
import org.apache.log4j.Logger;
public class TestServlet extends HttpServlet{
private static final long serialVersionUID = -6175353394519367540L;
private Logger log = Logger.getLogger(TestServlet.class);
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
this.doPost(req, resp);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse
response)
throws ServletException, IOException {
try {
int len = request.getContentLength();
System.out.println("数据流长度:" +len);
//获取 HTTP 请求的输入流
InputStream is = request.getInputStream();
//已 HTTP 请求输入流建立一个 BufferedReader 对象
BufferedReader br = new BufferedReader(new
InputStreamReader(is,"UTF-8"));
//读取 HTTP 请求内容
String buffer = null;
StringBuffer sb = new StringBuffer();
while ((buffer = br.readLine()) != null) {
//在页面中显示读取到的请求参数
sb.append(buffer+"\n");
}
System.out.println("接收 post 发送数
据:\n"+sb.toString().trim());
PrintWriter out = response.getWriter();
StringBuffer stringBuffer = new StringBuffer("");
stringBuffer.append("");
stringBuffer.append("800 ");
stringBuffer.append("jkuiowerncxuidafjkf
daouifdaljkn ");
stringBuffer.append(" ");
out.write(stringBuffer.toString());
out.flush();
out.close();
} catch (Exception e) {
log.error(e.getMessage(), e);
}
}
}
控制台输出如下：
数据流长度:175
接收 post 发送数据:
yisou
abcd1234
10010000
00
responseString:800 jkuiowerncx
uidafjkfdaouifdaljkn
HttpClient client = new HttpClient();
//设置代理服务器地址和端口
//client.getHostConfiguration().setProxy("proxy_host_addr",proxy_port);
//使用 GET 方法，如果服务器需要通过 HTTPS 连接，那只需要将下面 URL 中的 http
换成 https
//HttpMethod method = new GetMethod("http://java.sun.com");
//使用 POST 方法
PostMethod post = new PostMethod(url);
//设置要发送请求的 XML 数据,这里还可以不用直接发送 XML 数据，可以设置参数
//post.setParameter(key, value);
post.setRequestEntity(new StringRequestEntity(xml, "text/xml", "GBK"));
//执行请求
client.executeMethod(post);
//打印返回的信息
byte[] by = post.getResponseBody();
PrintWriter pw = response.getWriter();
pw.print(new String(by));
//释放连接
post.releaseConnection();
} catch (Exception e) {
e.printStackTrace();
}
}
Server:
这里是关键部分代码
//------------接收物流方请求的 XML 数据-----------------------
//获取 request 接收到的流长度，因为这里如果是使用 Struts2 框架，当发送方把
Content-type
//设置成 application/x-www-form-urlencoded 会导致传送过来的数据流被过滤掉
//如果这里 len 不为-1，而下面的 br 又为空的话，说明被过滤掉了。
int len = request.getContentLength();
System.out.println("数据流长度:" +len);
//获取 HTTP 请求的输入流
InputStream is = request.getInputStream();
//已 HTTP 请求输入流建立一个 BufferedReader 对象
BufferedReader br = new BufferedReader(new InputStreamReader(is,"UTF-8"));
//BufferedReader br = request.getReader();
//读取 HTTP 请求内容
String buffer = null;
StringBuffer sb = new StringBuffer();
while ((buffer = br.readLine()) != null) {
//在页面中显示读取到的请求参数
sb.append(buffer);
}
关于解决：request.getInputStream 或 request.getReader()被过滤掉的问题，可以用 JSP 先接收
数据，然后再把 content-type 设置成 xml/text 类型再次请求真正的接口就可以接收到数据。
我是这样想到解决方法的，如果有朋友有更好的方法，请留言给个提示，我也去研究下。
这章内容虽然很简单，但是对于新手的我们来说一出问题可能就会被弄得焦头烂额，大家有
兴趣可以记下，呵呵
百度 httpclient 发送 xml
dom4j 解析 xml 你的问题就解决了
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