最近需要使用java对Rest接口进行调用,也就是直接使用java直接发送Post, Get, Put, Delete等请求。
印象中可以使用Apache Common下的HttpClient来做,结果HttpClient已经独立成了HttpComponent,编码方式也有所改变。
Google出来的很多文章多数是common-httpclient的方式,在新版本中不怎么适用。经过一番研究自己做了一下封装:
package cn.com.dayang.auth;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import org.apache.log4j.Logger;
public class HttpXmlClient {
private static Logger log = Logger.getLogger(HttpXmlClient.class);
public static String post(String url, Map<String, String> params) {
DefaultHttpClient httpclient = new DefaultHttpClient();
String body = null;
log.info("create httppost:" + url);
HttpPost post = postForm(url, params);
body = invoke(httpclient, post);
httpclient.getConnectionManager().shutdown();
return body;
}
public static String get(String url) {
DefaultHttpClient httpclient = new DefaultHttpClient();
String body = null;
log.info("create httppost:" + url);
HttpGet get = new HttpGet(url);
body = invoke(httpclient, get);
httpclient.getConnectionManager().shutdown();
return body;
}
private static String invoke(DefaultHttpClient httpclient,
HttpUriRequest httpost) {
HttpResponse response = sendRequest(httpclient, httpost);
String body = paseResponse(response);
return body;
}
private static String paseResponse(HttpResponse response) {
log.info("get response from http server..");
HttpEntity entity = response.getEntity();
log.info("response status: " + response.getStatusLine());
String charset = EntityUtils.getContentCharSet(entity);
log.info(charset);
String body = null;
try {
body = EntityUtils.toString(entity);
log.info(body);
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return body;
}
private static HttpResponse sendRequest(DefaultHttpClient httpclient,
HttpUriRequest httpost) {
log.info("execute post...");
HttpResponse response = null;
try {
response = httpclient.execute(httpost);
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return response;
}
private static HttpPost postForm(String url, Map<String, String> params){
HttpPost httpost = new HttpPost(url);
List<NameValuePair> nvps = new ArrayList <NameValuePair>();
Set<String> keySet = params.keySet();
for(String key : keySet) {
nvps.add(new BasicNameValuePair(key, params.get(key)));
}
try {
log.info("set utf-8 form entity to httppost");
httpost.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return httpost;
}
}
如何调用:
Map<String, String> params = new HashMap<String, String>();
params.put("name", name);
params.put("password", password);
String xml = HttpXmlClient.post(loginUrl, params);
log.info(xml);
参考资料:
HttpComponents Client GA主页
官方提供的入门文档
官方提供的Examples(这个最直接)
Ruby发送请求的方式
还是喜欢Ruby的发http请求的方式,本来想在项目中集成Groovy, 时间关系直接用java实现了
require "net/http"
require "rexml/document"
require "iconv"
puts 'read test xml from file...'
file = File.open('task.xml')
doc = REXML::Document.new file
xml = doc.to_s #document to xml string
cov=Iconv.new('gbk', 'utf-8')#create encoder
encodedXml = cov.iconv(xml)#encoding zh_CN
puts encodedXml #display log
params= {}
params["msg"]=xml
#post http request
uri = URI.parse("http://localhost:8080/monitor/client/message")
1.upto 2 do |i|
puts 'send time:' + i.to_s
res = Net::HTTP.post_form(uri, params)
end
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