Struts2 使用Jquery+ajax 文件上传

 1 var formData = new FormData(); 2 formData.append("file1",$("#file1")[0].files[0]);//第一个file1代表后台文件属性名，第二个file1表示html中input的id 3 $.ajax({ 4 ????type:"post", 5 ????url:"ajax/uploadFile", 6 ????data:formData, 7 ????processData : false, ?8 ????contentType : false, 9 ????success : function(res) { 10 ????????console.log(res);11 ????????if(res=="success"){12 ????????????$("#labResult").text("文件上传成功");13 ????????}14 ????}, 15 ????error : function(msg) { 16 ????????console.log(msg.responsText);17 ????} 18 });

 1 import java.io.File; 2 import java.io.FileInputStream; 3 import java.io.FileOutputStream; 4 import java.io.IOException; 5 import java.io.InputStream; 6 import java.io.OutputStream; 7 ?8 import javax.servlet.http.HttpServletRequest; 9 import javax.servlet.http.HttpServletResponse;10 11 import org.apache.struts2.ServletActionContext;12 13 import com.opensymphony.xwork2.ActionContext;14 import com.opensymphony.xwork2.ActionSupport;15 16 public class UploadAction extends ActionSupport{17 ????private File file1 ; 18 ????private String file1FileName ;//FileName为固定写法19 ????public File getFile1() {20 ????????return file1;21 ????}22 ????public void setFile1(File file1) {23 ????????this.file1 = file1;24 ????}25 ????public String getFile1FileName() {26 ????????return file1FileName;27 ????}28 ????public void setFile1FileName(String file1FileName) {29 ????????this.file1FileName = file1FileName;30 ????} 31 ????public String uploadFile() throws Exception { ?32 ????????33 ????????String path = ServletActionContext.getRequest().getServletContext().getRealPath("/WEB-INF/upload"); ?34 ????????//查看是否存在目录 不存在则创建35 ????????File file = new File(path);36 ????????//如果目录不存在37 ????????if(!file.exists()){38 ????????????file.mkdirs();39 ????????}40 ????????//文件不为空 则上传41 ????????if(file1!=null){42 ????????????//输出流 ?43 ????????????OutputStream os = new FileOutputStream(new File(path,file1FileName)); ?44 ????????????//输入流 ?45 ????????????InputStream is = new FileInputStream(file1); ?46 ??????????????47 ????????????byte[] buf = new byte[1024]; ?48 ????????????int length = 0 ; ?49 ??????????????50 ????????????while(-1 != (length = is.read(buf) ) ) ?51 ????????????{ ?52 ????????????????os.write(buf, 0, length) ; ?53 ????????????} ?54 ????????????is.close(); ?55 ????????????os.close(); ?56 ????????} ?57 ????????return "success"; ?58 ????} ?59 60 ????public void uploadFile(){61 ????????System.out.println("file1:"+file1+".");62 ????????System.out.println("file1FileName:"+file1FileName+".");63 ????????String path="";64 ????????try {65 ????????????path=uploadFile();66 ????????????HttpServletResponse response = ServletActionContext.getResponse();67 ????????????response.setContentType("text/html;charset=utf-8");68 ????????????response.getWriter().write(path);69 ????????} catch (Exception e) {70 ????????????e.printStackTrace();71 ????????}72 ????}73 }

<package name="ajax" extends="json-default" namespace="/ajax"> ???<action name="uploadFile" class="包名.UploadAction" method="uploadFile"></action></package>