<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
</dependency>
package com.example.spring_test.utils;
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.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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.*;
import java.io.File;
public class HttpClientUtils {
private static HttpPost post;
private static HttpResponse response;
private static HttpGet get;
private static HttpEntity entity;
private static Logger logger = LoggerFactory.getLogger(HttpClientUtils.class);
//ssl安全跳过
public 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) {
logger.error("配置跳过ssl证书出错",e.getMessage());
}
return client;
}
/**
* 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<Object, Object> parameters,Map<Object,Object> headers){
String basicUrl=url;
String result=null;
String urlencoded=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<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;
}
/**
* post(application/form-data)请求
* @param url url地址
* @param body 参数集
* @param headers header配置
* @return
*/
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<>();
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));
logger.info("post(application/form-data)请求,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;
}
/**
* 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){
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;
}
/**
* 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 {
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();
}
}
}
/**
* 上传文件
* @param localfilepath 文件路径
* @param url 上传文件的url
*/
public static void uploadfile(String localfilepath,String url) {
CloseableHttpClient httpclient=getignoreSSLClient();
try {
post = new HttpPost(url);
FileBody bin=new FileBody(new File(localfilepath));
entity = MultipartEntityBuilder.create().addPart("audioData",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);
logger.info("响应结果：",content);
System.out.println(content);
}
}catch(Exception e) {
e.printStackTrace();
}finally {
try {
if(httpclient!=null ) {
httpclient.close();
}
}catch(Exception e) {
e.printStackTrace();
}
}
}
}