Java java httpclient4.5 进行http,https通过SSL安全验证跳过，封装接口请求 get，post（formdata,json）封装，文件上传下载

package api;

import java.util.*;
import java.net.URI;
import org.apache.http.Consts;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.*;
import org.apache.http.entity.StringEntity;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import net.sf.json.JSONObject;
import org.apache.log4j.Logger;
import com.sun.org.apache.xml.internal.resolver.helpers.PublicId;
import com.sun.xml.internal.stream.Entity;

import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.ssl.TrustStrategy;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import java.io.*;
import java.io.File;
import org.apache.http.entity.mime.MultipartEntityBuilder;

public class TestHttpClient {
	static HttpPost post;
	static HttpResponse response;
	static HttpGet get;
	static HttpEntity entity;
//	private static Logger logger = Logger.getLogger(TestHttpClient.class);

	//ssl安全跳过
	public static CloseableHttpClient getignoreSSLClient() {
		CloseableHttpClient client =null;
		try {
			SSLContext sslContext=SSLContexts.custom().loadTrustMaterial(null, new TrustStrategy() {

				@Override
				public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
					return true;
				}
			}).build();
			client=HttpClients.custom().setSSLContext(sslContext).setSSLHostnameVerifier(new NoopHostnameVerifier()).build();

		}catch(Exception e) {
			e.printStackTrace();
		}
		return client;
	}

	//
	public static String getrequest(String url,Map<Object, Object> parameters,Map<Object,Object> headers){
		String basicUrl=url;
		String result=null;
		String urlencoded=null;
//		CloseableHttpClient httpclient=HttpClients.createDefault();
		CloseableHttpClient httpclient=getignoreSSLClient();
		List<NameValuePair> formData=new ArrayList<NameValuePair>();

		try {
			//参数分离
			if(!url.contains("=")) {
				if(parameters !=null && parameters.size()>0) {
					for(Map.Entry<Object,Object> entry:parameters.entrySet()) {
						String k =entry.getKey().toString();
						String v=entry.getValue().toString();
						formData.add(new BasicNameValuePair(k, v));
					}
				}
				urlencoded =EntityUtils.toString(new UrlEncodedFormEntity(formData, Consts.UTF_8));
				if(basicUrl.contains("?")) {

					get=new HttpGet(basicUrl+urlencoded);
					if(headers !=null && headers.size()>0) {
						for(Map.Entry<Object, Object> entry:headers.entrySet()) {
							get.setHeader(entry.getKey().toString(),entry.getValue().toString());
						}
					}else {
						get.setHeader(null);
					}
					response=httpclient.execute(get);
					entity=response.getEntity();
					result=EntityUtils.toString(entity,"UTF-8");
					return result;
				}else {
					//无？
					get=new HttpGet(basicUrl+"?"+urlencoded);
					if(headers !=null && headers.size()>0) {
						for(Map.Entry<Object, Object> entry:headers.entrySet()) {
							get.setHeader(entry.getKey().toString(),entry.getValue().toString());
						}
					}else {
						get.setHeader(null);
					}
					response=httpclient.execute(get);
					entity=response.getEntity();
					result=EntityUtils.toString(entity,"UTF-8");
					return result;
				}
			}else {

				//纯url
				get=new HttpGet(basicUrl);
				response=httpclient.execute(get);
				entity=response.getEntity();
				result=EntityUtils.toString(entity,"UTF-8");
				return result;
			}
		}catch (IOException e) {
			e.printStackTrace();
		}finally {
			try {
				if(httpclient!=null) {
					httpclient.close();
				}
			}catch(IOException e) {
			e.printStackTrace();
			}
		}
		return result;
	}

	//postformData
	public static String postformData(String url,Map<Object, Object> body,Map<Object, Object> headers){
		String basicUrl=url;
		String result=null;

		CloseableHttpClient httpclient=getignoreSSLClient();
		List<NameValuePair> formData=new ArrayList<NameValuePair>();
		try {
			   post =new HttpPost();
			   post.setURI(new URI(basicUrl));
			   //上面可以直接用post = new HttpPost(url)代替
	           for (Iterator iter = body.keySet().iterator(); iter.hasNext();) {
	    			String k = (String) iter.next();
	    			String v = String.valueOf(body.get(k));
	    			formData.add(new BasicNameValuePair(k, v));
	    			System.out.println("构造参数完毕");
	    		}
				if(headers !=null && headers.size()>0) {
					for(Map.Entry<Object, Object> entry:headers.entrySet()) {
						post.setHeader(entry.getKey().toString(),entry.getValue().toString());
					}
				}else {
					post.setHeader(null);
					//header设置完毕
				}
				post.setEntity(new UrlEncodedFormEntity(formData,Consts.UTF_8));
	            response = httpclient.execute(post);
	            entity  =response.getEntity();
	            result=EntityUtils.toString(entity, "UTF-8");
	            int errorCode= response.getStatusLine().getStatusCode();
	            if(String.valueOf(errorCode)!=null) {
	            		return result;
	            }else {
	            	result=null;
	            	return result;
	            }

		}catch(Exception e ) {
			e.printStackTrace();
		}finally {
			try {
					if(httpclient!=null) {
						httpclient.close();
					}
				}catch(Exception e) {
					e.printStackTrace();
				}
		}
		return result;
	}

	// postJson
	public static String postJsonrequest(String url , Map<Object, Object> body , Map<Object, Object> headers){

		String basicUrl=url;
		String result=null;
		post =new HttpPost(basicUrl);
		CloseableHttpClient httpclient=getignoreSSLClient();
		try {
			if(headers !=null && headers.size()>0) {
				for(Map.Entry<Object, Object> entry:headers.entrySet()) {
					post.setHeader(entry.getKey().toString(),entry.getValue().toString());
				}
			}else {
				post.setHeader(null);
				//header设置完毕
			}
			//body转string,处理entity传入httpEntity
			StringEntity newEntity=new StringEntity(body.toString(),"utf-8");
			post.setEntity(newEntity);;
			response=httpclient.execute(post);
			int errorCode =response.getStatusLine().getStatusCode();
			if(String.valueOf(errorCode) !=null) {
				entity =response.getEntity();
				result=EntityUtils.toString(entity, "UTF-8");
				return result;
			}
		}catch (Exception e) {
			e.printStackTrace();
		}finally {
			try {
				if(httpclient!=null) {
					httpclient.close();
				}

			}catch (Exception e) {
				e.printStackTrace();
			}
		}
		return result;
	}	

	// download file ,两个都要带路径
	public static void downloadfile(String url,String localfileName,String remotefileName) {
		FileOutputStream output = null;
		InputStream in = null;
		CloseableHttpClient httpclient=getignoreSSLClient();
		try {
		get=new HttpGet(url);
		get.addHeader("fileName",remotefileName );
		response=httpclient.execute(get);
		entity =response.getEntity();
		in = entity.getContent();
		long length = entity.getContentLength();
		if (length <= 0) {
			return;
		}
		File localfile = new File(localfileName);

		if(! localfile.exists()) {
			localfile.createNewFile();
		}
		output=new FileOutputStream(localfile);
	    byte[] buffer = new byte[4096];
	    int readLength = 0;
	    while ((readLength=in.read(buffer)) > 0) {
	    byte[] bytes = new byte[readLength];
	    System.arraycopy(buffer, 0, bytes, 0, readLength);
	    output.write(bytes);
	                 }
	    output.flush();
		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			try {
				if(in !=null) {
					in.close();
				}
				if(output !=null) {
					output.close();
				}
			}catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	// uploadfile
	public static void uploadfile(String localfilepath,String url) {

		CloseableHttpClient httpclient=getignoreSSLClient();
		try {
		post = new HttpPost(url);
		FileBody bin=new FileBody(new File(localfilepath));
		HttpEntity reentity= MultipartEntityBuilder.create().addPart("bin",bin).build();
		post.setEntity(entity);
		response=httpclient.execute(post);
		entity=response.getEntity();
		if(entity!=null) {
			// length entity.getContentLength();
			String content=EntityUtils.toString(entity,"utf-8");
			EntityUtils.consume(entity);
		}

		}catch(Exception e) {
			e.printStackTrace();
		}finally {
			try {
				if(httpclient!=null ) {
					httpclient.close();
				}
			}catch(Exception e) {
				e.printStackTrace();
			}
		}

	}

}