import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.servlet.Servlet;
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
/**
* Servlet implementation class MyUploadServlet
*/
@WebServlet("/MyUploadServlet")
public class MyUploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private boolean isMultipart;
private String filePath;
private int maxFileSize = 50 * 1024;
private int maxMemSize = 10 * 1024;
private File file ;
private String targetPath;
/**
* @see Servlet#init(ServletConfig)
*/
public void init(ServletConfig config) throws ServletException {
filePath = "C:\\apache-tomcat-8.0.9\\webapps\\data\\";
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.getWriter().print("getMethod:welcome!!!");
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
isMultipart = ServletFileUpload.isMultipartContent(request);
response.setContentType("text/html;charset=gb2312");
// response.setCharacterEncoding("utf-8");
java.io.PrintWriter out = response.getWriter( );
if( !isMultipart ){
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
out.println("<p>No file uploaded</p>");
out.println("</body>");
out.println("</html>");
return;
}
DiskFileItemFactory factory = new DiskFileItemFactory();
// maximum size that will be stored in memory
factory.setSizeThreshold(maxMemSize);
// Location to save data that is larger than maxMemSize.
factory.setRepository(new File("C:\\apache-tomcat-8.0.9\\webapps\\data\\temp\\"));
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
// maximum file size to be uploaded.
upload.setSizeMax( maxFileSize );
try{
// Parse the request to get file items.
List fileItems = upload.parseRequest(request);
// Process the uploaded file items
Iterator i = fileItems.iterator();
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet upload</title>");
out.println("</head>");
out.println("<body>");
while ( i.hasNext () )
{
FileItem fi = (FileItem)i.next();
if ( !fi.isFormField () )
{
// Get the uploaded file parameters
String fieldName = fi.getFieldName();
String fileName = fi.getName();
String contentType = fi.getContentType();
boolean isInMemory = fi.isInMemory();
long sizeInBytes = fi.getSize();
// Write the file
if( fileName.lastIndexOf("\\") >= 0 ){
file = new File( targetPath +
fileName.substring( fileName.lastIndexOf("\\"))) ;
}else{
file = new File( targetPath +
fileName.substring(fileName.lastIndexOf("\\")+1)) ;
}
fi.write( file ) ;
out.println("Uploaded Filename: " + fileName + "<br>");
}else{
String fieldName=fi.getFieldName();
if(fieldName.equals("user")){
String user=fi.getString();
out.println(fieldName+":" + user + "<br>");
targetPath=filePath+user+"\\";
}
}
}
out.println("</body>");
out.println("</html>");
}catch(Exception ex) {
System.out.println(ex);
}
}
}
java web接收上传文件服务器端示例
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2015-03-15
13:58:37
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收藏 230KB RAR 举报 
UploadTest.rar （15个子文件） 
UploadTest src 
MyUploadServlet.java 4KB .classpath 834B build classes MyUploadServlet.class 5KB .settings org.eclipse.wst.jsdt.ui.superType.container 49B org.eclipse.wst.common.project.facet.core.xml 345B org.eclipse.wst.jsdt.ui.superType.name 6B org.eclipse.wst.common.component 482B .jsdtscope 503B org.eclipse.jdt.core.prefs 364B WebContent META-INF MANIFEST.MF 39B index.jsp 568B WEB-INF lib 
commons-io-2.4.jar 181KB commons-fileupload-1.3.1.jar 67KB web.xml 927B .project 1KB
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