1、引入maven依赖
<!-- HttpClient -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.12</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
</dependency>
<!-- commons-lang3 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>2、Http工具类
package com.amazecode.util;
import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.nio.charset.Charset;
import java.util.Iterator;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.commons.lang3.StringUtils;
/**
* * HTTP请求处理
*
* @author 绵知了
*/
public class HttpUtils {
private final static Logger logger = LoggerFactory.getLogger(HttpUtils.class);
private static final Charset UTF_8 = Charset.forName("UTF-8");
public static final String POST = "POST";
public static final String GET = "GET";
public static final int TIMEOUT = 30000;
public static final int FILE_TIMEOUT = 300000;
// boundary就是request头和上传文件内容的分隔符
public static final String BOUNDARY = "---------------------------123821742118716";
public static final String RESULT_FILE = "attachment";
/********************************* Http Get请求 *********************************/
/**
* * 发送HTTP请求
*
* @param serverUrl
* @param params
* @return
*/
public static String getHttp(String serverUrl, Map<String, String> params) {
return getHttp(serverUrl, params, null, TIMEOUT);
}
/**
* * 发送HTTP请求
*
* @param serverUrl
* @param params
* @return
*/
public static String getHttp(String serverUrl, Map<String, String> params, Map<String, String> headers) {
return getHttp(serverUrl, params, headers, TIMEOUT);
}
/**
* 发送HTTP请求
*
* @param serverUrl
* @param params
* @param headers
* @param time
* @return
*/
public static String getHttp(String serverUrl, Map<String, String> params, Map<String, String> headers,
Integer time) {
logger.info("\n【请求地址】: {} \n【请求参数】: {} \n【请求头部】: {}", serverUrl, params, headers);
HttpURLConnection conn = null;
BufferedReader br = null;
try {
// 构建请求参数
StringBuilder sbParam = new StringBuilder(serverUrl);
if (mapIsNotEmpty(params)) {
sbParam.append("?");
if (mapIsNotEmpty(params)) {
for (Map.Entry<String, String> entry : params.entrySet()) {
sbParam.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
sbParam.append("=");
sbParam.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
sbParam.append("&");
}
}
}
// 发送请求
URL url = new URL(sbParam.toString());
conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
conn.setRequestMethod(GET);
conn.setUseCaches(false);
conn.setDoOutput(true);
conn.setReadTimeout(time);
conn.setConnectTimeout(time);
if (mapIsNotEmpty(headers)) {
for (Map.Entry<String, String> entry : headers.entrySet()) {
conn.setRequestProperty(entry.getKey(), entry.getValue());
}
}
logger.info("[HttpsUtils] [getHttp] connection success");
// 获取状态码
int responseCode = conn.getResponseCode();
if (responseCode != HttpURLConnection.HTTP_OK) {
logger.error("[HttpsUtils] [getHttp] response status = {}", responseCode);
return StringUtils.EMPTY;
}
// 取得返回信息
br = new BufferedReader(new InputStreamReader(conn.getInputStream(), UTF_8));
String line;
StringBuilder result = new StringBuilder();
while ((line = br.readLine()) != null) {
result.append(line);
}
logger.info("\n【响应数据】: {} ", result);
// JSON处理
return result.toString();
} catch (Exception e) {
logger.error("[HttpsUtils] [getHttp Exception", e);
} finally {
if (br != null) {
try {
br.close();
} catch (Exception e) {
logger.error("[HttpsUtils] [getHttp] br.close is exception. {}", e);
}
}
if (conn != null) {
try {
conn.disconnect();
} catch (Exception e) {
logger.error("[HttpsUtils] [getHttp] conn.disconnect() is exception. {}", e);
}
}
}
return StringUtils.EMPTY;
}
/********************************* HTTP POST请求 *********************************/
/**
* POST 请求
*
* @param serverUrl
* @param params
* @return
*/
public static String postHttp(String serverUrl, Map<String, String> params) {
return postHttp(serverUrl, params, null);
}
/**
* POST 请求
*
* @param serverUrl
* @param params
* @param headers
* @return
*/
public static String postHttp(String serverUrl, Map<String, String> params, Map<String, String> headers) {
return postHttp(serverUrl, params, headers, POST, TIMEOUT);
}
/**
* 发送HTTP请求
*
* @param serverUrl
* @param params
* @param headers
* @param type
* @param timeout
* @return
*/
public static String postHttp(String serverUrl, Map<String, String> params, Map<String, String> headers,
String type, int timeout) {
logger.info("\n【请求地址】: {} \n【请求参数】: {} \n【请求头部】: {}", serverUrl, params, headers);
HttpURLConnection conn = null;
OutputStreamWriter osw = null;
BufferedReader br = null;
try {
// 发送请求
URL url = new URL(serverUrl);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
conn.setRequestMethod(type);
conn.setUseCaches(false);
conn.setDoOutput(true);
conn.setReadTimeout(timeout);
conn.setConnectTimeout(timeout);
if (mapIsNotEmpty(headers)) {
for (Map.Entry<String, String> entry : headers.entrySet()) {
conn.setRequestProperty(entry.getKey(), entry.getValue());
}
}
// 构建请求参数
StringBuilder sbParam = new StringBuilder();
if (mapIsNotEmpty(params)) {
for (Map.Entry<String, String> entry : params.entrySet()) {
sbParam.append(entry.getKey());
sbParam.append("=");
sbParam.append(entry.getValue());
sbParam.append("&");
}
}
// 获得输出流
osw = new OutputStreamWriter(conn.getOutputStream(), UTF_8);
osw.write(sbParam.toString());
osw.flush();
osw.close();
logger.info("[HttpsUtils][postHttp] connection success.");
// 获取状态码
int responseCode = conn.getResponseCode();
if (responseCode != HttpURLConnection.HTTP_OK) {
logger.error("[HttpsUtils][postHttp] response status = {}", responseCode);
return StringUtils.EMPTY;
}
// 取得返回信息
br = new BufferedReader(new InputStreamReader(conn.getInputStream(), UTF_8));
String line;
StringBuilder result = new StringBuilder();
while ((line = br.readLine()) != null) {
result.append(line);
}
logger.info("\n【响应数据】: {} ", result);
// JSON处理
return result.toString();
} catch (Exception e) {
logger.error("[HttpsUtils][postHttp] Exception", e);
} finally {
if (osw != null) {
try {
osw.close();
} catch (Exception e) {
logger.error("[HttpsUtils][postHttp] osw.close() is Exception. {}", e);
}
}
if (br != null) {
try {
br.close();
} catch (Exception e) {
logger.error("[HttpsUtils][postHttp] br.close() is Exception. {}", e);
}
}
if (conn != null) {
try {
conn.disconnect();
} catch (Exception e) {
logger.error("[HttpsUtils][postHttp] conn.disconnect() is Exception. {}", e);
}
}
}
return StringUtils.EMPTY;
}
/********************************* HTTP 推送JSON格式 *********************************/
/**
* Post 请求 格式为 application/json
*
* @param serverUrl
* @param urlParams
* @param headers
* @param jsonParam
* @return
*/
public static String postJson(String serverUrl, Map<String, String> urlParams, Map<String, String> headers,
String jsonParam) {
logger.info("\n【请求地址】: {} \n【请求参数】: {} \n【请求头部】: {}\n【请求JSON】: {}", serverUrl, urlParams, headers, jsonParam);
HttpURLConnection conn = null;
OutputStreamWriter osw = null;
BufferedReader br = null;
try {
// 构建请求参数
StringBuilder sbParam = new StringBuilder(serverUrl);
if (mapIsNotEmpty(urlParams)) {
sbParam.append("?");
if (mapIsNotEmpty(urlParams)) {
for (Map.Entry<String, String> entry : urlParams.entrySet()) {
sbParam.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
sbParam.append("=");
sbParam.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
sbParam.append("&");
}
}
}
// 发送请求
URL url = new URL(sbParam.toString());
conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
if (mapIsNotEmpty(headers)) {
for (Map.Entry<String, String> entry : headers.entrySet()) {
conn.setRequestProperty(entry.getKey(), entry.getValue());
}
}
conn.setRequestMethod(POST);
conn.setUseCaches(false);
conn.setDoOutput(true);
conn.setReadTimeout(TIMEOUT);
conn.setConnectTimeout(TIMEOUT);
// 设置文件类型:
conn.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
// 设置接收类型否则返回415错误
conn.setRequestProperty("accept", "application/json");
// 往服务器里面发送数据
if (jsonParam != null) {
byte[] writebytes = jsonParam.getBytes();
// 设置文件长度
conn.setRequestProperty("Content-Length", String.valueOf(writebytes.length));
}
// 获得输出流
osw = new OutputStreamWriter(conn.getOutputStream(), UTF_8);
osw.write(jsonParam);
osw.flush();
osw.close();
logger.info("[HttpsUtils][postJson] connection success.");
// 构建请求参数
sbParam = new StringBuilder();
int responseCode = conn.getResponseCode();
if (responseCode != HttpURLConnection.HTTP_OK) {
logger.error("[HttpsUtls][postJson] responseCode：{}", responseCode);
return StringUtils.EMPTY;
}
// 取得返回信息
br = new BufferedReader(new InputStreamReader(conn.getInputStream(), UTF_8));
String line;
StringBuilder result = new StringBuilder();
while ((line = br.readLine()) != null) {
result.append(line);
}
logger.info("\n【响应数据】: {} ", result);
// JSON处理
return result.toString();
} catch (Exception e) {
logger.error("[HttpsUtils][postJson] Exception", e);
} finally {
if (osw != null) {
try {
osw.close();
} catch (Exception e) {
logger.error("[HttpsUtils][postJson] osw.close() is Exception. {}", e);
}
}
if (br != null) {
try {
br.close();
} catch (Exception e) {
logger.error("[HttpsUtils][postJson] br.close() is Exception. {}", e);
}
}
if (conn != null) {
try {
conn.disconnect();
} catch (Exception e) {
logger.error("[HttpsUtils][postJson] conn.disconnect() is Exception. {}", e);
}
}
}
return StringUtils.EMPTY;
}
/**
* post 请求 格式为 text/plain
*
* @param serverUrl
* @param urlParams
* @param headers
* @param jsonParam
* @return
*/
public static String postText(String serverUrl, Map<String, String> urlParams, Map<String, String> headers,
String jsonParam) {
logger.info("\n【请求地址】: {} \n【请求参数】: {} \n【请求头部】: {}\n【请求JSON】: {}", serverUrl, urlParams, headers, jsonParam);
HttpURLConnection conn = null;
OutputStreamWriter osw = null;
BufferedReader br = null;
try {
// 构建请求参数
StringBuilder sbParam = new StringBuilder(serverUrl);
if (mapIsNotEmpty(urlParams)) {
sbParam.append("?");
if (mapIsNotEmpty(urlParams)) {
for (Map.Entry<String, String> entry : urlParams.entrySet()) {
sbParam.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
sbParam.append("=");
sbParam.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
sbParam.append("&");
}
}
}
// 发送请求
URL url = new URL(sbParam.toString());
conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
if (mapIsNotEmpty(headers)) {
for (Map.Entry<String, String> entry : headers.entrySet()) {
conn.setRequestProperty(entry.getKey(), entry.getValue());
}
}
conn.setRequestMethod(POST);
conn.setUseCaches(false);
conn.setDoOutput(true);
conn.setReadTimeout(TIMEOUT);
conn.setConnectTimeout(TIMEOUT);
// 设置文件类型:
conn.setRequestProperty("Content-Type", "text/plain; charset=UTF-8");
// 设置接收类型否则返回415错误
conn.setRequestProperty("accept", "application/json");
// 往服务器里面发送数据
if (jsonParam != null) {
byte[] writebytes = jsonParam.getBytes();
// 设置文件长度
conn.setRequestProperty("Content-Length", String.valueOf(writebytes.length));
}
// 获得输出流
osw = new OutputStreamWriter(conn.getOutputStream(), UTF_8);
osw.write(jsonParam);
osw.flush();
osw.close();
logger.info("[HttpsUtils][postText] connection success.");
// 构建请求参数
sbParam = new StringBuilder();
int responseCode = conn.getResponseCode();
if (responseCode != HttpURLConnection.HTTP_OK) {
logger.error("[HttpsUtils][postText] responseCode：{}", responseCode);
return StringUtils.EMPTY;
}
// 取得返回信息
br = new BufferedReader(new InputStreamReader(conn.getInputStream(), UTF_8));
String line;
StringBuilder result = new StringBuilder();
while ((line = br.readLine()) != null) {
result.append(line);
}
logger.info("\n【响应数据】: {} ", result);
// JSON处理
return result.toString();
} catch (Exception e) {
logger.error("[HttpsUtils][postText] Exception", e);
} finally {
if (osw != null) {
try {
osw.close();
} catch (Exception e) {
logger.error("[HttpsUtils][postText] osw.close() is Exception. {}", e);
}
}
if (br != null) {
try {
br.close();
} catch (Exception e) {
logger.error("[HttpsUtils][postText] br.close() is Exception. {}", e);
}
}
if (conn != null) {
try {
conn.disconnect();
} catch (Exception e) {
logger.error("[HttpsUtls][postText] conn.disconnect() is Exception. {}", e);
}
}
}
return StringUtils.EMPTY;
}
/**
* * 上传多个文件
*
* @param urlStr
* @param urlParams
* @param fileMap
* @return
*/
public static String formUpload(String urlStr, Map<String, String> urlParams, Map<String, String> fileMap) {
if (mapIsEmpty(fileMap)) {
logger.info("\n【请求地址】: {} \n【请求参数】: {} ", urlStr, urlParams);
} else {
logger.info("\n【请求地址】: {} \n【请求参数】: {} \n【请求文件】: {}", urlStr, urlParams, fileMap);
}
String res = "";
HttpURLConnection conn = null;
DataInputStream in = null;
try {
URL url = new URL(urlStr);
conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(FILE_TIMEOUT);
conn.setReadTimeout(FILE_TIMEOUT);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 6.1; zh-CN; rv:1.9.2.6)");
conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + BOUNDARY);
OutputStream out = new DataOutputStream(conn.getOutputStream());
// urlParams
if (urlParams != null) {
StringBuilder strBuf = new StringBuilder();
Iterator<Map.Entry<String, String>> iter = urlParams.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<String, String> entry = iter.next();
String inputName = entry.getKey();
String inputValue = entry.getValue();
if (inputValue == null) {
continue;
}
strBuf.append("\r\n").append("--").append(BOUNDARY).append("\r\n");
strBuf.append("Content-Disposition: form-data; name=\"" + inputName + "\"\r\n\r\n");
strBuf.append(inputValue);
}
out.write(strBuf.toString().getBytes());
}
// file
if (fileMap != null) {
Iterator<Map.Entry<String, String>> iter = fileMap.entrySet().iterator();
while (iter.hasNext()) {
Map.Entry<String, String> entry = iter.next();
String inputName = entry.getKey();
String inputValue = entry.getValue();
if (inputValue == null) {
continue;
}
File file = new File(inputValue);
if (!file.exists()) {
logger.error("[HttpsUtils][formUpload] file is not exist. name = {}", inputValue);
return res;
}
String filename = file.getName();
StringBuilder strBuf = new StringBuilder();
strBuf.append("\r\n").append("--").append(BOUNDARY).append("\r\n");
strBuf.append("Content-Disposition: form-data; name=\"" + inputName + "\"; filename=\"" + filename
+ "\"\r\n");
strBuf.append("Content-Type:" + "multipart/form-data;boundary=" + "*****" + "\r\n\r\n");
out.write(strBuf.toString().getBytes());
in = new DataInputStream(new FileInputStream(file));
int bytes = 0;
byte[] bufferOut = new byte[1024];
while ((bytes = in.read(bufferOut)) != -1) {
out.write(bufferOut, 0, bytes);
}
in.close();
}
}
byte[] endData = ("\r\n--" + BOUNDARY + "--\r\n").getBytes();
out.write(endData);
out.flush();
out.close();
// 读取返回数据
StringBuilder strBuf = new StringBuilder();
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
strBuf.append(line);
}
res = strBuf.toString();
reader.close();
reader = null;
} catch (Exception e) {
logger.error("[HttpsUtils][formUpload] is Exception. {}", e);
} finally {
if (conn != null) {
conn.disconnect();
conn = null;
}
if (in != null) {
try {
in.close();
} catch (Exception e) {
logger.error("[HttpsUtils][formUpload] in.close is Exception. {}", e);
}
}
}
logger.info("\n【响应数据】: {} ", res);
return res;
}
/**
* 通过url下载单个文件
*
* @param serverUrl
* @param params
* @param folder
* @param filePath
* @return
*/
public static String downloadFile(String serverUrl, Map<String, String> params, String folder, String filePath) {
logger.info("\n【请求地址】: {} \n【请求参数】: {} ", serverUrl, params);
HttpURLConnection conn = null;
InputStream in = null;
FileOutputStream os = null;
try {
// 构建请求参数
StringBuilder sbParam = new StringBuilder(serverUrl);
if (mapIsNotEmpty(params)) {
sbParam.append("?");
if (mapIsNotEmpty(params)) {
for (Map.Entry<String, String> entry : params.entrySet()) {
sbParam.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
sbParam.append("=");
sbParam.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
sbParam.append("&");
}
}
}
// 发送请求
URL url = new URL(sbParam.toString());
conn = (HttpURLConnection) url.openConnection();
conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
conn.setRequestMethod(GET);
conn.setUseCaches(false);
conn.setDoOutput(true);
conn.setReadTimeout(TIMEOUT);
conn.setConnectTimeout(TIMEOUT);
int responseCode = conn.getResponseCode();
if (responseCode != HttpURLConnection.HTTP_OK) {
logger.error("[HttpsUtils][downloadFile] responseCode：{}", responseCode);
return StringUtils.EMPTY;
}
boolean resultIsFile = parseIsFile(conn);
// 返回不是文件流，则返回字符串
if (!resultIsFile) {
// 读取返回数据
StringBuilder strBuf = new StringBuilder();
BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
strBuf.append(line);
}
reader.close();
reader = null;
logger.info("\n【响应数据】: {} ", strBuf);
return strBuf.toString();
}
// 返回文件流
File targetFile = new File(folder, filePath);
in = conn.getInputStream();
os = new FileOutputStream(targetFile);
byte[] buffer = new byte[4 * 1024];
int read;
while ((read = in.read(buffer)) > -1) {
os.write(buffer, 0, read);
}
os.flush();
return filePath;
} catch (Exception e) {
logger.error("[HttpsUtils][downloadFile] Exception", e);
return StringUtils.EMPTY;
} finally {
if (in != null) {
try {
in.close();
} catch (Exception e) {
logger.error("[HttpsUtils] [downloadFile] in.close is exception. {}", e);
}
}
if (os != null) {
try {
os.close();
} catch (Exception e) {
logger.error("[HttpsUtils] [downloadFile] os.close is exception. {}", e);
}
}
if (conn != null) {
try {
conn.disconnect();
} catch (Exception e) {
logger.error("[HttpsUtils] [downloadFile] conn.disconnect is exception. {}", e);
}
}
}
}
/********************************* 通用 *********************************/
/**
* * 是否是文件
*
* @param conn
* @return
*/
private static boolean parseIsFile(HttpURLConnection conn) {
String isFile = conn.getHeaderField("Content-Disposition");
if (StringUtils.isEmpty(isFile)) {
return false;
}
return StringUtils.contains(isFile, RESULT_FILE);
}
/**
* 判断Map是否不为空
*
* @param m
* @return
*/
public static boolean mapIsNotEmpty(Map<?, ?> m) {
return !mapIsEmpty(m);
}
/**
* 判断Map是否为空
*
* @param m
* @return
*/
public static boolean mapIsEmpty(Map<?, ?> m) {
return m == null || m.isEmpty();
}
}