使用HttpClient4.5发送XML
使用方法
使用HttpClient发送请求、接收响应很简单，一般需要如下几步即可。
1. 创建HttpClient对象。
2. 创建请求方法的实例，并指定请求URL。如果需要发送GET请求，创建HttpGet对象；如果需要发送POST请求，创建HttpPost对象。
3. 如果需要发送请求参数，可调用HttpGet、HttpPost共同的setParams(HetpParams params)方法来添加请求参数；对于HttpPost对象而言，也可调用setEntity(HttpEntity entity)方法来设置请求参数。
4. 调用HttpClient对象的execute(HttpUriRequest request)发送请求，该方法返回一个HttpResponse。
5. 调用HttpResponse的getAllHeaders()、getHeaders(String name)等方法可获取服务器的响应头；调用HttpResponse的getEntity()方法可获取HttpEntity对象，该对象包装了服务器的响应内容。程序可通过该对象获取服务器的响应内容。
6. 释放连接。无论执行方法是否成功，都必须释放连接
package com.ps.ukefu.entcunsomer;
/**
* Author:ZhuShangJin
* Date:2018/6/11
*/
import java.io.IOException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.collections.MapUtils;
import org.apache.http.Consts;
import org.apache.http.HeaderIterator;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.ssl.SSLContextBuilder;
import org.apache.http.util.EntityUtils;
import org.junit.Test;
/**
*
* @ClassName: HttpsUtils
* @Description: TODO(https post忽略证书请求)
*/
public class HttpClientUtils {
private static final String HTTP = "http";
private static final String HTTPS = "https";
private static SSLConnectionSocketFactory sslsf = null;
private static PoolingHttpClientConnectionManager cm = null;
private static SSLContextBuilder builder = null;
static {
try {
builder = new SSLContextBuilder();
// 全部信任 不做身份鉴定
builder.loadTrustMaterial(null, new TrustStrategy() {
@Override
public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
return true;
}
});
sslsf = new SSLConnectionSocketFactory(builder.build(),
new String[]{"SSLv2Hello", "SSLv3", "TLSv1", "TLSv1.2"}, null, NoopHostnameVerifier.INSTANCE);
Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create()
.register(HTTP, new PlainConnectionSocketFactory()).register(HTTPS, sslsf).build();
cm = new PoolingHttpClientConnectionManager(registry);
cm.setMaxTotal(200);// max connection
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* httpClient post请求
*
* @param url 请求url
* @param header 头部信息
* @param param 请求参数 form提交适用
* @param entity 请求实体 json/xml提交适用
* @return 可能为空 需要处理
* @throws Exception
*/
public static String post(String url, Map<String, String> header, Map<String, String> param, StringEntity entity)
throws Exception {
String result = "";
CloseableHttpClient httpClient = null;
try {
httpClient = getHttpClient();
//HttpGet httpPost = new HttpGet(url);//get请求
HttpPost httpPost = new HttpPost(url);//Post请求
// 设置头信息
if (MapUtils.isNotEmpty(header)) {
for (Map.Entry<String, String> entry : header.entrySet()) {
httpPost.addHeader(entry.getKey(), entry.getValue());
}
}
// 设置请求参数
if (MapUtils.isNotEmpty(param)) {
List<NameValuePair> formparams = new ArrayList<NameValuePair>();
for (Map.Entry<String, String> entry : param.entrySet()) {
// 给参数赋值
formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
UrlEncodedFormEntity urlEncodedFormEntity = new UrlEncodedFormEntity(formparams, Consts.UTF_8);
httpPost.setEntity(urlEncodedFormEntity);
}
// 设置实体 优先级高
if (entity != null) {
httpPost.addHeader("Content-Type", "text/xml");
httpPost.setEntity(entity);
}
HttpResponse httpResponse = httpClient.execute(httpPost);
int statusCode = httpResponse.getStatusLine().getStatusCode();
System.out.println("状态码：" + statusCode);
if (statusCode == HttpStatus.SC_OK) {
HttpEntity resEntity = httpResponse.getEntity();
result = EntityUtils.toString(resEntity);
} else {
readHttpResponse(httpResponse);
}
} catch (Exception e) {
throw e;
} finally {
if (httpClient != null) {
httpClient.close();
}
}
return result;
}
public static String postXML(String url,String xml){
CloseableHttpClient client = null;
CloseableHttpResponse resp = null;
try{
HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("Content-Type", "text/xml; charset=UTF-8");
client = HttpClients.createDefault();
StringEntity entityParams = new StringEntity(xml,"utf-8");
httpPost.setEntity(entityParams);
client = HttpClients.createDefault();
resp = client.execute(httpPost);
String resultMsg = EntityUtils.toString(resp.getEntity(),"utf-8");
return resultMsg;
}catch (Exception e){
e.printStackTrace();
}finally {
try {
if(client!=null){
client.close();
}
if(resp != null){
resp.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
public static CloseableHttpClient getHttpClient() throws Exception {
CloseableHttpClient httpClient = HttpClients.custom().setSSLSocketFactory(sslsf).setConnectionManager(cm)
.setConnectionManagerShared(true).build();
return httpClient;
}
public static String readHttpResponse(HttpResponse httpResponse) throws ParseException, IOException {
StringBuilder builder = new StringBuilder();
// 获取响应消息实体
HttpEntity entity = httpResponse.getEntity();
// 响应状态
builder.append("status:" + httpResponse.getStatusLine());
builder.append("headers:");
HeaderIterator iterator = httpResponse.headerIterator();
while (iterator.hasNext()) {
builder.append("\t" + iterator.next());
}
// 判断响应实体是否为空
if (entity != null) {
String responseString = EntityUtils.toString(entity);
builder.append("response length:" + responseString.length());
builder.append("response content:" + responseString.replace("\r\n", ""));
}
return builder.toString();
}
@Test
public void testSendHttpPost3() {//https://209.160.54.4/suns/XML_Rx.php
String url = "http://192.168.1.180:4050";
try {
String responseContent = postXML(url, "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n" +
"<Transfer attribute=\"Connect\">\n" +
"<ext id=\"20013\"/>\n" +
"<outer to=\"15505510628\"/>\n" +
"</Transfer>");
System.out.println(responseContent);
} catch (Exception e) {
e.printStackTrace();
}
}
@Test
public void testSendHttpPost2() {
String url = "http://192.168.1.180:4050";
try {
StringEntity entity = new StringEntity("<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n" +
"<Transfer attribute=\"Connect\">\n" +
"<ext id=\"20013\"/>\n" +
"<outer to=\"15505510628\"/>\n" +
"</Transfer>", "UTF-8"); //<span style="color:rgb(85,85,85);font-family:'宋体', 'Arial Narrow', arial, serif;font-size:14px;">不指定参数名的方式来POST数据</span>
String responseContent = post(url, null, null, entity);
System.out.println(responseContent);
} catch (Exception e) {
e.printStackTrace();
}
}
}