JAVA實現多個附件傳輸
阿新 • • 發佈:2018-12-06
需要引入以下jar包
<dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>4.2.4.RELEASE</version> </dependency> <dependency> <groupId>commons-httpclient</groupId> <artifactId>commons-httpclient</artifactId> <version>3.1</version> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpmime</artifactId> <version>4.5.3</version> </dependency>
import org.springframework.mock.web.MockMultipartFile; import org.springframework.web.multipart.MultipartFile; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.util.*; public class FileUpload{ private final String thirdUrl = "http://12.0.0.1/v1/api/test"; private final String[] File_Types = {"doc","docx","xlsx","xls","pptx"};//限制檔案傳輸型別 private final int limitSize = 10;//限制檔案傳輸大小 public void send(String title, String content, List<File> fileList){ List<MultipartFile> multiFileList = new ArrayList<>(); long totalSize = 0; for(File file : fileList){ String fileFullName = file.getName(); String[] fileNameParts = fileFullName.split("\\."); if(!Arrays.asList(File_Types).contains(fileNameParts[1])){ logger.warn("========== file type is {}, cannot be transferred to the 3rd part", fileNameParts[1]); continue; } try { InputStream inputStream = new FileInputStream(file); MultipartFile multipartFile = new MockMultipartFile(fileNameParts[0], fileFullName, null,inputStream); totalSize += multipartFile.getSize(); if ((totalSize / 1024 / 1024) > limitSize){ logger.warn("========= the file size must be less than 10MB!"); return; } multiFileList.add(multipartFile); } catch (Exception e) { logger.error("獲取附件失敗:", e); return; } } Map<String,Object> params = new HashMap<>(); params.put("title", title); params.put("content", content); params.put("multiFiles", multiFileList); try { HttpMultiPartFileUtil.httpPostRequest(thirdUrl, "files", params, 5000); } catch (Exception e) { e.printStackTrace(); } } }
import java.io.IOException; import java.io.PrintWriter; import java.io.StringWriter; import java.io.Writer; import java.util.HashMap; import java.util.List; import java.util.Map; import org.apache.commons.io.IOUtils; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.config.RequestConfig; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.ContentType; import org.apache.http.entity.mime.HttpMultipartMode; import org.apache.http.entity.mime.MultipartEntityBuilder; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.protocol.HTTP; import org.springframework.web.multipart.MultipartFile; import lombok.extern.slf4j.Slf4j; @Slf4j public class HttpMultiPartFileUtil { public static Map<String, String> httpPostRequest(String url, String fileParName, Map<String, Object> params, int timeout) { Map<String, String> resultMap = new HashMap<String, String>(); CloseableHttpClient httpClient = HttpClients.createDefault(); String result = ""; try { HttpPost httpPost = new HttpPost(url); MultipartEntityBuilder builder = MultipartEntityBuilder.create(); builder.setCharset(java.nio.charset.Charset.forName("UTF-8")); builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE); List<MultipartFile> multipartFiles = (List<MultipartFile>)params.get("multiFiles"); params.remove("multiFiles"); String fileName = null; MultipartFile multipartFile = null; for (int i = 0; i < multipartFiles.size(); i++) { multipartFile = multipartFiles.get(i); fileName = multipartFile.getOriginalFilename(); builder.addBinaryBody(fileParName, multipartFile.getInputStream(), ContentType.MULTIPART_FORM_DATA, fileName);// 檔案流 } //決中文亂碼 ContentType contentType = ContentType.create(HTTP.PLAIN_TEXT_TYPE, HTTP.UTF_8); for (Map.Entry<String, Object> entry : params.entrySet()) { if(entry.getValue() == null) continue; // 類似瀏覽器表單提交,對應input的name和value builder.addTextBody(entry.getKey(), entry.getValue().toString(), contentType); } HttpEntity entity = builder.build(); httpPost.setEntity(entity); HttpResponse response = httpClient.execute(httpPost);// 執行提交 // 設定連線超時時間 RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(timeout) .setConnectionRequestTimeout(timeout).setSocketTimeout(timeout).build(); httpPost.setConfig(requestConfig); HttpEntity responseEntity = response.getEntity(); resultMap.put("code", String.valueOf(response.getStatusLine().getStatusCode())); resultMap.put("data", IOUtils.toString(responseEntity.getContent())); } catch (Exception e) { resultMap.put("code", "error"); resultMap.put("data", "HTTP請求出現異常: " + e.getMessage()); Writer w = new StringWriter(); e.printStackTrace(new PrintWriter(w)); log.error("HTTP請求出現異常: " + w.toString()); } finally { try { httpClient.close(); } catch (IOException e) { e.printStackTrace(); } } return resultMap; } }
參考:https://blog.csdn.net/u010826617/article/details/80236226