springmvc http请求，支持get，post,附件传输和参数传输

主要解决http请求支持get,post,put,delete等常规方法，支持@RequestParam,@RequestBody,@PathVariable等参数格式传输，支持传输附件同时传递参数等，主体代码如下：

package mes.client.action;import cn.hutool.crypto.digest.DigestUtil;
import com.alibaba.fastjson.JSON;
import mes.client.pojo.po.CommonEntityPo;
import mes.client.pojo.vo.ResponseInfo;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.Map;public class MesMomConnectAction {private static Logger logger = LoggerFactory.getLogger(MesMomConnectAction.class);/*** 无请求体body,向指定URL发送方法的请求** @param url   发送请求的URL* @return URL 所代表远程资源的响应结果*/public static ResponseInfo getHttpParamReq(String url,String requestMethodType) {StringBuilder result = new StringBuilder();BufferedReader in = null;HttpURLConnection connection = null;try {URL getUrl = new URL(url);// 打开和URL之间的连接connection = (HttpURLConnection) getUrl.openConnection();// 在connect之前，设置通用的请求属性connection.setRequestProperty("accept", "*/*");connection.setRequestProperty("connection", "Keep-Alive");connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");connection.setRequestProperty("Charsert", "UTF-8");//添加必须的头部信息addHeader(connection);// 配置本次连接的Content-type，form表单是"application/x-www-form-urlencoded"，json是"application/json"等// 根据需求自己调整Content-typeconnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");// 设置连接主机服务器的超时时间：15000毫秒connection.setConnectTimeout(15000);// 设置读取远程返回的数据时间：60000毫秒connection.setReadTimeout(60000);// 设置连接方式：getconnection.setRequestMethod(requestMethodType);// 建立实际的连接，可不写，注意connection.getOutputStream会隐含的进行connect。connection.connect();// 定义BufferedReader输入流来读取URL的响应in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));String line;while ((line = in.readLine()) != null) {result.append(line);}ResponseInfo responseInfo = JSON.parseObject(result.toString(), ResponseInfo.class);if(responseInfo.getStatusCode() == null){return getFailResponse(result.toString());}return responseInfo;} catch (Exception e) {logger.error("调用MES4.0接口异常",e);return getExceptionResponse(e);}// 使用finally块来关闭输入流finally {try {if (in != null) {in.close();}if (connection != null) {//关闭连接connection.disconnect();}} catch (Exception e2) {e2.printStackTrace();}}}/** * @description: get请求* @date: 2023-10-16 16:58:30 * @param url * @return ResponseInfo */public static ResponseInfo sendGet(String url){return getHttpParamReq(url,"GET");}/** * @description:方法说明* @date: 2023-10-16 15:42:33 * @param url * @return ResponseInfo */public static ResponseInfo sendDelete(String url) {return getHttpParamReq(url,"DELETE");}/** * @description: post请求* @date: 2023-10-16 17:04:07 * @param url * @param param * @return ResponseInfo */public static ResponseInfo sendPost(String url, CommonEntityPo param){return getHttpBodyReq(url,param,"POST");}/** * @description: put请求* @date: 2023-10-16 17:05:05 * @param url * @param param * @return ResponseInfo */public static ResponseInfo sendPut(String url, CommonEntityPo param){return getHttpBodyReq(url,param,"PUT");}/*** 有请求体body,向指定 URL 发送方法的请求** @param url   发送请求的 URL* @param param 请求参数。* @return 所代表远程资源的响应结果*/public static ResponseInfo getHttpBodyReq(String url, CommonEntityPo param, String requestMethodType) {BufferedReader in = null;InputStream inputStream = null;HttpURLConnection connection = null;StringBuilder result = new StringBuilder();try {URL postUrl = new URL(url);// 打开和URL之间的连接connection = (HttpURLConnection) postUrl.openConnection();// 在connect之前，设置通用的请求属性connection.setRequestProperty("accept", "*/*");connection.setRequestProperty("connection", "Keep-Alive");connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");connection.setRequestProperty("Charsert", "UTF-8");//添加一些必要的请求头信息addHeader(connection);//connection.setRequestProperty("Authorization","Bearer eyJhbGciOiJSUzI1NiIsInR5cCIgOiAiSldUIiwia2lkIiA6ICJiUlR5WGJ0Q05aaS1fUkVKSGUwNHNEd2RYaTNVSHRLOWZoWndXdGdPdWdNIn0.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.AUnf5meZWqYNYbfbzyqY3C9WoiL-ISCoVebvtJV-1EF8iQe2FXVEE22CLKnTvHBEoY-W62F8LtG3eW3B5LP54WBXq0JyxnMSLTjqZWMfvYmxNLfjO3rcviK9jAqqxrvLy1IR4ZVFz8ez4ThfCr3TrbammQvZgxF1jie_hx_-3RTiLTra1qyTUj8CrFRaVDBvWTt8nDu6FsRBAkqImPgZ3Jdhf-WDeVlwOkDCGPd5cUQ9KAQs2JUMY4H_jC9cgcSpQuUjNOQOnu1lnYjnsREswR7iBNSkaW6DlRry-HhD8FRs1QLOwKGcgFCBU7O9O-NCH8EyrZOriSpiPaElE2-i2Q");connection.setConnectTimeout(15000);connection.setReadTimeout(60000);// 发送POST请求必须设置如下两行，参数要放在http正文内connection.setDoOutput(true);connection.setDoInput(true);// 默认是 GET方式connection.setRequestMethod(requestMethodType);// Post 请求不使用缓存connection.setUseCaches(false);// 配置连接的Content-type，form表单是"application/x-www-form-urlencoded"，json是"application/json"等connection.setRequestProperty("Content-Type", "application/json");connection.connect();//参数处理if(param != null){//打印接口入参logger.info("post请求接口入参：{}",JSON.toJSONString(param.getData()));BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(connection.getOutputStream(), "UTF-8"));writer.write(JSON.toJSONString(param.getData()));writer.close();}// 定义BufferedReader输入流来读取URL的响应in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));String line;while ((line = in.readLine()) != null) {result.append(line);}ResponseInfo responseInfo = JSON.parseObject(result.toString(), ResponseInfo.class);if(responseInfo.getStatusCode() == null){return getFailResponse(result.toString());}return responseInfo;} catch (Exception e) {logger.error("调用MES4.0接口异常",e);return getExceptionResponse(e);} finally {try {if (in != null) {in.close();}if(inputStream != null){inputStream.close();}if (connection != null) {//关闭连接connection.disconnect();}} catch (IOException ex) {ex.printStackTrace();}}}/*public static void main(String[] args) throws IOException {//=========================================邮箱==================================================List<Map<String, Object>> files = new ArrayList<>();Map<String, Object> map = new HashMap();File file = new File("C:\\Users\\86188\\Desktop\\t1.png");map.put("name", "t1.png");map.put("file", file);files.add(map);Map<String, Object> param = new HashMap();param.put("data", "data");sendFileUrl("http://127.0.0.1:8080/sendReport", files, param);}*//** * @description: 有附件和参数的发送方法的请求（调用方式参考实例如上方法）* @date: 2023-10-23 10:41:40 * @param actionUrl ：请求链接url* @param files : 附件* @param param ：请求参数* @return ResponseInfo */public static void sendFileUrl(String actionUrl, List<Map<String, Object>> files, Map<String, Object> param){HttpURLConnection conn = null;DataOutputStream outStream = null;try {final String NEWLINE = "\r\n";String BOUNDARY = java.util.UUID.randomUUID().toString();String PREFIX = "--", LINEND = "\r\n";String MULTIPART_FROM_DATA = "multipart/form-data";String CHARSET = "UTF-8";URL uri = new URL(actionUrl);conn = (HttpURLConnection) uri.openConnection();conn.setConnectTimeout(15000);conn.setReadTimeout(60000);conn.setDoInput(true);// 允许输入conn.setDoOutput(true);// 允许输出conn.setUseCaches(false);conn.setRequestMethod("POST"); // Post方式conn.setRequestProperty("connection", "keep-alive");conn.setRequestProperty("Charsert", "UTF-8");conn.setRequestProperty("Accept", "application/json;charset=UTF-8");conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA+ ";boundary=" + BOUNDARY);outStream = new DataOutputStream(conn.getOutputStream());// 获取表单中上传控件之外的控件数据，写入到输出流对象（根据上面分析的抓包的内容格式拼凑字符串）；if (param != null && !param.isEmpty()) { // 这时请求中的普通参数，键值对类型的，相当于上面分析的请求中的username，可能有多个for (Map.Entry<String, Object> entry : param.entrySet()) {String key = entry.getKey(); // 键，相当于上面分析的请求中的usernameObject value = param.get(key); // 值，相当于上面分析的请求中的sdafdsaoutStream.writeBytes(PREFIX + BOUNDARY + NEWLINE); // 像请求体中写分割线，就是前缀+分界线+换行outStream.writeBytes("Content-Disposition: form-data; "+ "name=\"" + key + "\"" + NEWLINE); // 拼接参数名，格式就是Content-Disposition: form-data; name="key" 其中key就是当前循环的键值对的键，别忘了最后的换行outStream.writeBytes(NEWLINE); // 空行，一定不能少，键和值之间有一个固定的空行outStream.write(value.toString().getBytes("UTF-8")); // 将值写入,用字节流防止乱码// 或者写成：dos.write(value.toString().getBytes(charset));outStream.writeBytes(NEWLINE); // 换行}}// 发送文件数据if (files != null)for (Map<String, Object> file : files) {StringBuilder sb1 = new StringBuilder();sb1.append(PREFIX);sb1.append(BOUNDARY);sb1.append(LINEND);sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\""+ file.get("name") + "\"" + LINEND);sb1.append("Content-Type: application/octet-stream; charset="+ CHARSET + LINEND);sb1.append(LINEND);outStream.write(sb1.toString().getBytes("utf-8"));    //getBytes()不加utf-8 传输中文名附件时，接收附件的地方解析文件名会乱码InputStream is = new FileInputStream((File) file.get("file"));byte[] buffer = new byte[1024];int len = 0;while ((len = is.read(buffer)) != -1) {outStream.write(buffer, 0, len);}is.close();outStream.write(LINEND.getBytes());}// 请求结束标志byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();outStream.write(end_data);outStream.flush();// 得到响应码int res = conn.getResponseCode();//if (res == 200) {InputStream in = conn.getInputStream();InputStreamReader isReader = new InputStreamReader(in,"UTF-8");BufferedReader bufReader = new BufferedReader(isReader);String line = "";String data = "";while ((line = bufReader.readLine()) != null) {data += line;}logger.info("读取后最后结果：" + data);//}} catch (Exception e) {e.printStackTrace();} finally {try {//关闭流if(outStream != null){outStream.close();}//关闭连接if(conn != null){conn.disconnect();}} catch (IOException e) {e.printStackTrace();}}}//multipartFile格式文件发送public static void sendMultipartFileUrl(String actionUrl, MultipartFile file, Map<String, Object> param){HttpURLConnection conn = null;DataOutputStream outStream = null;try {final String NEWLINE = "\r\n";String BOUNDARY = java.util.UUID.randomUUID().toString();String PREFIX = "--", LINEND = "\r\n";String MULTIPART_FROM_DATA = "multipart/form-data";String CHARSET = "UTF-8";URL uri = new URL(actionUrl);conn = (HttpURLConnection) uri.openConnection();conn.setConnectTimeout(15000);conn.setReadTimeout(60000);conn.setDoInput(true);// 允许输入conn.setDoOutput(true);// 允许输出conn.setUseCaches(false);conn.setRequestMethod("POST"); // Post方式conn.setRequestProperty("connection", "keep-alive");conn.setRequestProperty("Charsert", "UTF-8");conn.setRequestProperty("Accept", "application/json;charset=UTF-8");conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA+ ";boundary=" + BOUNDARY);outStream = new DataOutputStream(conn.getOutputStream());// 获取表单中上传控件之外的控件数据，写入到输出流对象（根据上面分析的抓包的内容格式拼凑字符串）；if (param != null && !param.isEmpty()) { // 这时请求中的普通参数，键值对类型的，相当于上面分析的请求中的username，可能有多个for (Map.Entry<String, Object> entry : param.entrySet()) {String key = entry.getKey(); // 键，相当于上面分析的请求中的usernameObject value = param.get(key); // 值，相当于上面分析的请求中的sdafdsaoutStream.writeBytes(PREFIX + BOUNDARY + NEWLINE); // 像请求体中写分割线，就是前缀+分界线+换行outStream.writeBytes("Content-Disposition: form-data; "+ "name=\"" + key + "\"" + NEWLINE); // 拼接参数名，格式就是Content-Disposition: form-data; name="key" 其中key就是当前循环的键值对的键，别忘了最后的换行outStream.writeBytes(NEWLINE); // 空行，一定不能少，键和值之间有一个固定的空行outStream.write(value.toString().getBytes("UTF-8")); // 将值写入,用字节流防止乱码// 或者写成：dos.write(value.toString().getBytes(charset));outStream.writeBytes(NEWLINE); // 换行}}// 发送文件数据if (file != null){StringBuilder sb1 = new StringBuilder();sb1.append(PREFIX);sb1.append(BOUNDARY);sb1.append(LINEND);sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\""+ file.getOriginalFilename() + "\"" + LINEND);sb1.append("Content-Type: application/octet-stream; charset="+ CHARSET + LINEND);sb1.append(LINEND);outStream.write(sb1.toString().getBytes("utf-8"));    //getBytes()不加utf-8 传输中文名附件时，接收附件的地方解析文件名会乱码InputStream is = file.getInputStream();byte[] buffer = new byte[1024];int len = 0;while ((len = is.read(buffer)) != -1) {outStream.write(buffer, 0, len);}is.close();outStream.write(LINEND.getBytes());}// 请求结束标志byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();outStream.write(end_data);outStream.flush();// 得到响应码int res = conn.getResponseCode();//if (res == 200) {InputStream in = conn.getInputStream();InputStreamReader isReader = new InputStreamReader(in,"UTF-8");BufferedReader bufReader = new BufferedReader(isReader);String line = "";String data = "";while ((line = bufReader.readLine()) != null) {data += line;}logger.info("读取后最后结果：" + data);//}} catch (Exception e) {e.printStackTrace();} finally {try {//关闭流if(outStream != null){outStream.close();}//关闭连接if(conn != null){conn.disconnect();}} catch (IOException e) {e.printStackTrace();}}}/** * @description: 需要额外添加一些请求头信息* @date: 2023-10-11 14:42:07 */private static void addHeader(HttpURLConnection connection){//针对一些第三方系统加密header}/** * @description: 返回请求异常信息* @date: 2023-10-15 17:43:36 * @param e * @return ResponseInfo */private static ResponseInfo getExceptionResponse(Exception e){ByteArrayOutputStream baos = new ByteArrayOutputStream();e.printStackTrace(new PrintStream(baos));String failMsg = baos.toString();return getFailResponse(failMsg);}/** * @description: 封装返回信息结果* @date: 2023-10-19 19:44:23 * @param failMsg * @return ResponseInfo */private static ResponseInfo getFailResponse(String failMsg){ResponseInfo responseInfo = new ResponseInfo();responseInfo.setStatusCode(400);responseInfo.setMessage(failMsg);return responseInfo;}
}