1、HTML代码
<body>
<!--上传一个文件 enctype="multipart/form-data" 上传文件必须设置这个属性和属性值-->
<form action="singleUpload!upload" method="post" enctype="multipart/form-data">
文件:<s:file name="img"></s:file><br>
<input type="submit" value="上传" />
</form>
<hr>
//对应action代码
public class SingleUploadAction extends ActionSupport implements ServletContextAware {
private ServletContext app;
private File img;//收集上传文件
public File getImg() {
return img;
}
public void setImg(File img) {
this.img = img;
}
public String getImgFileName() {
return imgFileName;
}
public void setImgFileName(String imgFileName) {
this.imgFileName = imgFileName;
}
public String getImgContentType() {
return imgContentType;
}
public void setImgContentType(String imgContentType) {
this.imgContentType = imgContentType;
}
private String imgFileName;//固定命名方式,xxxFileName来得到上传的文件名
private String imgContentType;//固定命名方式,xxxContentType得到文件类型;
public String upload(){
String path = app.getRealPath("image");//这里我们在WebRoot中建一个image文件夹
File to = new File(path+"\"+imgFileName);//文件保存的目标位置
try {
//将用户上传的文件保存到目标位置
FileUtils.copyFile(img, to);
} catch (IOException e) {
e.printStackTrace();
}
return this.SUCCESS;
}
public void setServletContext(ServletContext context) {
this.app = context;
}
}
<!--同时上传多个文件-->
<form action="multiUpload!upload" method="post" enctype="multipart/form-data">
文件:<s:file name="img"></s:file><br>
文件:<s:file name="img"></s:file><br>
文件:<s:file name="img"></s:file><br>
<input type="submit" value="上传" />
</form>
</body>
//对应action 代码
public class MultiUploadAction extends ActionSupport implements ServletContextAware {
private ServletContext app;
private File[] img;
private String[] imgFileName;//固定命名方式,xxxFileName来得到上传的文件名数组
private String[] imgContentType;//固定命名方式,xxxContentType得到文件类型数组;
public File[] getImg() {
return img;
}
public void setImg(File[] img) {
this.img = img;
}
public String[] getImgFileName() {
return imgFileName;
}
public void setImgFileName(String[] imgFileName) {
this.imgFileName = imgFileName;
}
public String[] getImgContentType() {
return imgContentType;
}
public void setImgContentType(String[] imgContentType) {
this.imgContentType = imgContentType;
}
public void setServletContext(ServletContext context) {
this.app = context;
}
public String upload(){
for (int i = 0; i < img.length; i++) {
String path = app.getRealPath("image");
File to = new File(path+"\"+imgFileName[i]);//文件保存的目标位置
try {
//将用户上传的文件保存到目标位置
FileUtils.copyFile(img[i], to);
} catch (IOException e) {
e.printStackTrace();
}
}
return this.SUCCESS;
}
}