HTTP请求工具类 —JAVA
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import javax.net.ssl.SSLContext;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.config.RequestConfig.Builder;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.client.utils.URLEncodedUtils;
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.entity.ContentType;
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.ssl.TrustStrategy;
import org.apache.http.util.EntityUtils;
public class HttpComponentUtil {
public static final ContentType TEXT_PLAIN = ContentType.create("text/plain", StandardCharsets.UTF_8);
// 从连接时获取时间
public static int CONNECTION_REQUEST_TIMEOUT = 1000;
// 建立连接时间（三次握手时间）
public static int CONNECTION_TIMEOUT = 2000;
// 服务器返回数据时间
public static int SOCKET_TIMEOUT = 50000;
/**
* HttpClient 连接池
*/
private static PoolingHttpClientConnectionManager cm = null;
static {
// 初始化连接池，可用于请求HTTP/HTTPS（信任所有证书）
cm = new PoolingHttpClientConnectionManager(getRegistry());
// 整个连接池最大连接数
cm.setMaxTotal(100);
// 每路由最大连接数，默认值是2
cm.setDefaultMaxPerRoute(5);
}
/**
* 获取 HTTPClient注册器
*
* @return
* @throws Exception
*/
private static Registry getRegistry() {
Registry registry = null;
try {
registry = RegistryBuilder. create()
.register("http", new PlainConnectionSocketFactory()).register("https", getSSLFactory()).build();
} catch (Exception e) {
System.out.println("获取 HTTPClient注册器失败" + e);
}
return registry;
}
/**
* 获取HTTPS SSL连接工厂
*
* 跳过证书校验，即信任所有证书
*
*
* @return
* @throws Exception
*/
private static SSLConnectionSocketFactory getSSLFactory() throws Exception {
// 设置HTTPS SSL证书信息，跳过证书校验，即信任所有证书请求HTTPS
SSLContextBuilder sslBuilder = new SSLContextBuilder().loadTrustMaterial(null, new TrustStrategy() {
@Override
public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
return true;
}
});
// 获取HTTPS SSL证书连接上下文
SSLContext sslContext = sslBuilder.build();
// 获取HTTPS连接工厂
SSLConnectionSocketFactory sslCsf = new SSLConnectionSocketFactory(sslContext,
new String[] { "SSLv2Hello", "SSLv3", "TLSv1", "TLSv1.2" }, null, NoopHostnameVerifier.INSTANCE);
return sslCsf;
}
/**
* 发送 HTTP GET请求
*
* 不带请求参数和请求头
*
*
* @param url
* 地址
* @return
* @throws Exception
*/
public static String httpGet(String url) throws Exception {
HttpGet httpGet = new HttpGet(url);
return doHttp(httpGet);
}
/**
* 发送 HTTP GET请求
*
* 带请求参数，不带请求头
*
*
* @param url
* 地址
* @param params
* 参数
* @return
* @throws Exception
* @throws Exception
*/
public static String httpGet(String url, Map params) throws Exception {
// 转换请求参数
List pairs = covertParams2NVPS(params);
// 装载请求地址和参数
URIBuilder ub = new URIBuilder();
ub.setPath(url);
ub.setParameters(pairs);
HttpGet httpGet = new HttpGet(ub.build());
return doHttp(httpGet);
}
/**
* 发送 HTTP GET请求
*
* 带请求参数和请求头
*
*
* @param url
* 地址
* @param headers
* 请求头
* @param params
* 参数
* @return
* @throws Exception
* @throws Exception
*/
public static String httpGet(String url, Map headers, Map params) throws Exception {
// 转换请求参数
List pairs = covertParams2NVPS(params);
// 装载请求地址和参数
URIBuilder ub = new URIBuilder();
ub.setPath(url);
ub.setParameters(pairs);
HttpGet httpGet = new HttpGet(ub.build());
// 设置请求头
for (Map.Entry param : headers.entrySet())
httpGet.addHeader(param.getKey(), String.valueOf(param.getValue()));
return doHttp(httpGet);
}
/**
* 发送 HTTP POST请求
*
* 不带请求参数和请求头
*
*
* @param url
* 地址
* @return
* @throws Exception
*/
public static String httpPost(String url) throws Exception {
HttpPost httpPost = new HttpPost(url);
return doHttp(httpPost);
}
/**
* 发送 HTTP POST请求
*
* 带请求参数，不带请求头
*
*
* @param url
* 地址
* @param params
* 参数
* @return
* @throws Exception
*/
public static String httpPost(String url, Map params) throws Exception {
// 转换请求参数
List pairs = covertParams2NVPS(params);
HttpPost httpPost = new HttpPost(url);
// 设置请求参数
httpPost.setEntity(new UrlEncodedFormEntity(pairs, StandardCharsets.UTF_8.name()));
return doHttp(httpPost);
}
/**
* 发送 HTTP POST请求
*
* 带请求参数和请求头
*
*
* @param url
* 地址
* @param headers
* 请求头
* @param params
* 参数
* @return
* @throws Exception
*/
public static String httpPost(String url, Map headers, Map params)
throws Exception {
// 转换请求参数
List pairs = covertParams2NVPS(params);
HttpPost httpPost = new HttpPost(url);
// 设置请求参数
httpPost.setEntity(new UrlEncodedFormEntity(pairs, StandardCharsets.UTF_8.name()));
// 设置请求头
for (Map.Entry param : headers.entrySet())
httpPost.addHeader(param.getKey(), String.valueOf(param.getValue()));
return doHttp(httpPost);
}
/**
* 发送 HTTP POST请求，参数格式JSON
*
* 请求参数是JSON格式，数据编码是UTF-8
*
*
* @param url
* @param param
* @return
* @throws Exception
*/
public static String httpPostJson(String url, String param) throws Exception {
HttpPost httpPost = new HttpPost(url);
// 设置请求头
httpPost.addHeader("Content-Type", "application/json; charset=UTF-8");
// 设置请求参数
httpPost.setEntity(new StringEntity(param, StandardCharsets.UTF_8.name()));
return doHttp(httpPost);
}
/**
* application/x-www-form-urlencoded
*
* @param url
* @param map
* @return
* @throws Exception
*/
public static String httpPostXwwwform(String url, Map map) throws Exception {
HttpPost httpPost = new HttpPost(url);
// 设置请求头
httpPost.setHeader("Content-type", "application/x-www-form-urlencoded");
// 设置请求参数
List nvps = new ArrayList();
if (map != null) {
for (Entry entry : map.entrySet()) {
nvps.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
}
httpPost.setEntity(new UrlEncodedFormEntity(nvps, StandardCharsets.UTF_8.name()));
return doHttp(httpPost);
}
/**
* 将Map键值对拼接成QueryString字符串，UTF-8编码
*
* @param params
* @return
* @throws Exception
*/
public static String getQueryStr(Map params) throws Exception {
return URLEncodedUtils.format(covertParams2NVPS(params), StandardCharsets.UTF_8.name());
}
/**
* 发送 HTTP 请求
*
* @param request
* @return
* @throws Exception
*/
private static String doHttp(HttpRequestBase request) throws Exception {
Builder builder = RequestConfig.custom();
RequestConfig config = builder.setSocketTimeout(SOCKET_TIMEOUT).setConnectTimeout(CONNECTION_TIMEOUT)
.setConnectionRequestTimeout(CONNECTION_REQUEST_TIMEOUT).build();
// 通过连接池获取连接对象
CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(config).setConnectionManager(cm)
.build();
return doRequest(httpClient, request);
}
/**
* 处理Http/Https请求，并返回请求结果
*
* 注：默认请求编码方式 UTF-8
*
*
* @param httpClient
* @param request
* @return 请求结果
* @throws Exception
*/
private static String doRequest(CloseableHttpClient httpClient, HttpRequestBase request) throws Exception {
String result = null;
CloseableHttpResponse response = null;
try {
// 获取请求结果
response = httpClient.execute(request);
// 解析请求结果
HttpEntity entity = response.getEntity();
// 转换结果
result = EntityUtils.toString(entity, StandardCharsets.UTF_8.name());
// 关闭IO流
EntityUtils.consume(entity);
} finally {
if (null != response)
response.close();
}
return result;
}
/**
* 转换请求参数
*
* @param params
* map参数
* @return nameValuePair集合
*/
private static List covertParams2NVPS(Map params) {
List pairs = new ArrayList();
for (Map.Entry param : params.entrySet())
pairs.add(new BasicNameValuePair(param.getKey(), String.valueOf(param.getValue())));
return pairs;
}
/**
* 下载文件方法 InputStream
*/
public static String httpPostJsonFile(String url, String param, String path, String FilenNme) throws Exception {
HttpPost httpPost = new HttpPost(url);
// 设置请求头
httpPost.addHeader("Content-Type", "application/json; charset=UTF-8");
// 设置请求参数
httpPost.setEntity(new StringEntity(param, StandardCharsets.UTF_8.name()));
Builder builder = RequestConfig.custom();
RequestConfig config = builder.setSocketTimeout(SOCKET_TIMEOUT).setConnectTimeout(CONNECTION_TIMEOUT)
.setConnectionRequestTimeout(CONNECTION_REQUEST_TIMEOUT).build();
// 通过连接池获取连接对象
CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(config).setConnectionManager(cm)
.build();
InputStream out = null;
CloseableHttpResponse response = null;
try {
// 获取请求结果
response = httpClient.execute(httpPost);
// 解析请求结果
HttpEntity entity = response.getEntity();
// 获取文件流
out = entity.getContent();
File file = new File(path, FilenNme + ".jpg");// 可以是任何图片格式.jpg,.png等
FileOutputStream fos = new FileOutputStream(file);
byte[] b = new byte[1024];
int nRead = 0;
while ((nRead = out.read(b)) != -1) {
fos.write(b, 0, nRead);
}
fos.flush();
fos.close();
out.close();
// 关闭IO流
EntityUtils.consume(entity);
} finally {
if (null != response)
response.close();
}
return path + "/" + FilenNme + ".jpg";
}
}