Httpclient工具类
一、引入依赖包
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.62</version>
</dependency>
二、工具类
package com.sskd.drm.utils;
import java.util.*;
import com.alibaba.fastjson.JSON;
import org.apache.http.*;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.*;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import java.io.IOException;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.ssl.SSLContexts;
import javax.net.ssl.SSLContext;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import java.io.*;
import java.io.File;
/**
* @name HttpClientUtils
* @Description Httpclient工具类
* @author Mr.bai
* @time 2020/5/15 13:06
* @version 1.0
*/
public class HttpClientUtils {
/**
* get请求
* @param url url地址
* @param parameters 参数map集
* @param headers header集
* @return
*/
public static String getrequest(String url,Map<String, String> parameters,Map<String,String> headers){
String basicUrl=url;
String result=null;
CloseableHttpClient httpclient=getignoreSSLClient();
List<NameValuePair> formData=new ArrayList<>();
try {
//参数分离
if(!url.contains("=")) {
if(parameters !=null && parameters.size()>0) {
for(Map.Entry<String,String> entry:parameters.entrySet()) {
String k =entry.getKey();
String v=entry.getValue();
formData.add(new BasicNameValuePair(k, v));
}
}
String urlencoded =EntityUtils.toString(new UrlEncodedFormEntity(formData, Consts.UTF_8));
if(basicUrl.contains("?")) {
basicUrl += urlencoded;
}else {
basicUrl+= "?"+urlencoded;
}
}
//纯url
HttpGet get=new HttpGet(basicUrl);
if(headers !=null && headers.size()>0) {
for(Map.Entry<String, String> entry:headers.entrySet()) {
get.setHeader(entry.getKey(),entry.getValue());
}
}else {
get.setHeader(null);
}
HttpResponse response=httpclient.execute(get);
return getResult(response);
}catch (IOException e) {
e.printStackTrace();
}finally {
try {
if(httpclient!=null) {
httpclient.close();
}
}catch(IOException e) {
e.printStackTrace();
}
}
return result;
}
/**
* post(application/form-data)请求
* @param url url地址
* @param body 参数集 如果参数内需要传输文件,传File
* @param headers header配置
* @return
*/
public static String postformData(String url,Map<String, Object> body,Map<String, String> headers){
CloseableHttpClient httpclient = getignoreSSLClient();
try {
HttpPost post =new HttpPost(url);
//请求表单参数
MultipartEntityBuilder reqEntity = MultipartEntityBuilder.create();
if (body != null && body.size() > 0){
for (String key : body.keySet()) {
if (body.get(key) instanceof File){
File file = (File) body.get(key);
FileBody fileBody = new FileBody(file);
reqEntity.addPart(key, fileBody);
}else {
reqEntity.addTextBody(key, body.get(key).toString(),ContentType.TEXT_PLAIN);
}
}
System.out.println("post(application/form-data)请求,构造参数完毕!");
}
post.setEntity(reqEntity.build());
//设置header
if(headers !=null && headers.size()>0) {
for (String key : headers.keySet()) {
post.setHeader(key,headers.get(key));
}
}else {
post.setHeader(null);
}
HttpResponse response = httpclient.execute(post);
return getResult(response);
}catch(Exception e ) {
System.err.println("请求出错\n错误信息:" +e.getMessage());
}finally {
try {
if(httpclient!=null) {
httpclient.close();
}
}catch(Exception e) {
e.printStackTrace();
}
}
return null;
}
/**
* post（application/json）
* @param url url地址
* @param body 参数集
* @param headers header配置
* @return
*/
public static String postJsonrequest(String url , Map<Object, Object> body , Map<Object, Object> headers){
HttpPost post =new HttpPost(url);
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("Content-Type","application/json;charset=UTF-8");
//header设置完毕
}
//body转string,处理entity传入httpEntity
StringEntity newEntity=new StringEntity(JSON.toJSONString(body),"utf-8");
post.setEntity(newEntity);;
HttpResponse response=httpclient.execute(post);
return getResult(response);
}catch (Exception e) {
System.err.println("请求出错\n错误信息:" +e.getMessage());
}finally {
try {
if(httpclient!=null) {
httpclient.close();
}
}catch (Exception e) {
e.printStackTrace();
}
}
return null;
}
/**
* 下载文件
* @param url 下载文件地址
* @param localfileName 本地储存路径，
* @param remotefileName 服务器资源路径
*/
public static void downloadfile(String url,String localfileName,String remotefileName) {
FileOutputStream output = null;
InputStream in = null;
CloseableHttpClient httpclient=getignoreSSLClient();
try {
HttpGet get=new HttpGet(url);
get.addHeader("fileName",remotefileName );
HttpResponse response=httpclient.execute(get);
HttpEntity 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();
}
}
}
/**
* 上传文件
* @param localfilepath 文件路径
* @param url 上传文件的url
*/
public static String uploadfile(String localfilepath,String url) {
CloseableHttpClient httpclient=getignoreSSLClient();
try {
HttpPost post = new HttpPost(url);
FileBody bin=new FileBody(new File(localfilepath));
HttpEntity entity = MultipartEntityBuilder.create().addPart("audioData",bin).build();
post.setEntity(entity);
HttpResponse response=httpclient.execute(post);
return getResult(response);
}catch(Exception e) {
e.printStackTrace();
}finally {
try {
if(httpclient!=null ) {
httpclient.close();
}
}catch(Exception e) {
e.printStackTrace();
}
}
return null;
}
/**
* ssl安全跳过
* @return
*/
private static CloseableHttpClient getignoreSSLClient() {
CloseableHttpClient client =null;
try {
SSLContext sslContext=SSLContexts.custom().loadTrustMaterial(null, (x509Certificates, s) -> true).build();
client=HttpClients.custom().setSSLContext(sslContext).setSSLHostnameVerifier(new NoopHostnameVerifier()).build();
}catch(Exception e) {
System.err.println("配置跳过ssl证书出错:" + e.getMessage());
}
return client;
}
private static String getResult(HttpResponse response) throws IOException {
HttpEntity entity=response.getEntity();
int errorCode= response.getStatusLine().getStatusCode();
if (HttpStatus.SC_OK==errorCode){
if (entity != null){
String result =EntityUtils.toString(entity,"utf-8");
//关闭entity
EntityUtils.consume(entity);
return result;
}
}
System.err.println("请求出错\n状态码:"+errorCode+"\n错误信息"+EntityUtils.toString(entity,"utf-8"));
return null;
}
}
