步驟:
第一步:再WEB-INF/lib下加入commons-fileupload-1.2.1.jar、commns-io-1.32.2.jar
第二步:
- <form action="${pageContext.request.contextPath}/control/employee/list_execute.action" enctype="multipart/form-data" method="post">
- 文件1:<input type="file" name="image"><br/>
- 文件2:<input type="file" name="image"><br/>
- 文件3:<input type="file" name="image"><br/>
- <input type="submit" value="上傳"/>
- </form>
注意:enctype="multipart/form-data" method="post"為固定值
第三步:
- public class HelloWorldAction {
- private File[] image; //得到上傳文件
- private String[] imageFileName; //得到文件的名稱
- private String[] imageContentType; //得到文件的類型
- public File[] getImage() {
- return image;
- }
-
- public void setImage(File[] image) {
- this.image = image;
- }
-
- public String[] getImageFileName() {
- return imageFileName;
- }
-
- public void setImageFileName(String[] imageFileName) {
- this.imageFileName = imageFileName;
- }
-
- public String[] getImageContentType() {
- return imageContentType;
- }
-
- public void setImageContentType(String[] imageContentType) {
- this.imageContentType = imageContentType;
- }
- public String execute() throws Exception{
- String realpath = ServletActionContext.getServletContext().getRealPath("/images");
- if(image!=null){
- File savedir = new File(realpath);
- if(!savedir.exists()) savedir.mkdirs();
- for(int i = 0 ; i<image.length ; i++){
- File savefile = new File(savedir, imageFileName[i]);
- FileUtils.copyFile(image[i], savefile);
- }
- ActionContext.getContext().put("message", "上傳成功");
- }
- return "success";
- }
- }
注意:image屬性要和form表單上傳控件名稱要一致