007 - 文件上传
1.文件上传
?//FileUpLoadAction .java
public class FileUpLoadAction {
?private File image;??????????????? //取得文件
?private String imageFileName;????? //取得文件名
?private String imageContentType;?? //取得文件类型
?
?
?private File[] images;??????????????? //取得多个文件
?private String[] imagesFileName;????? //取得多个文件名
?private String[] imagesContentType;?? //取得多个文件类型
?
?public String executeSimple() throws Exception{? //上传单个文件
??
???String realpath = ServletActionContext.getServletContext().getRealPath("/images");
???System.out.println(realpath);
???if(image!=null){
?????File savefile = new File(new File(realpath), imageFileName);
?????if(!savefile.getParentFile().exists()) savefile.getParentFile().mkdirs();
?????FileUtils.copyFile(image, savefile);
?????ActionContext.getContext().put("message", "上传成功");
???}
???return "success";
?}
?
?public String executeMutiple() throws Exception{??????? //上传多个文件
??
???String realpath = ServletActionContext.getServletContext().getRealPath("/images");
???System.out.println(realpath);
???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", "上传成功");
???}
???return "success";
?}
?
?.....//getters and setters
?
}
//上传单个文件表单
??? <form action="upload_executeSimple" enctype="multipart/form-data" method="post">
?????? ???? 文件:<input type="file" name="image"><br/>
????????? ?<input type="submit" value="上传"/>
??? </form>
???
???
//上传多个文件表单,?? 注意enctype="multipart/form-data"
??? <form action="upload_executeMutiple" enctype="multipart/form-data" method="post">
???? ????? 文件1:<input type="file" name="images"><br/>
???? ????? 文件2:<input type="file" name="images"><br/>
???? ????? 文件3:<input type="file" name="images"><br/>
????????? ?<input type="submit" value="上传"/>
??? </form>
?
//struts.xml
<struts>
???? <constant name="struts.enable.DynamicMethodInvocation" value="true"/>
???? <constant name="struts.multipart.maxSize" value="10701096"/>
?????
???? <package name="upload" namespace="/" extends="struts-default">
?????????? ?<action name="upload_*" method="{1}">
?????????????????? <result name="success">/WEB-INF/page/message.jsp</result>
??????????? </action>
????? </package>
</struts>
?
?
?
public class DownloadAction extends ActionSupport {
??????? private String fileName;?
?????
?????? ?public void setFileName() {?????????
?????????????? String tempFileName = ServletActionContext.getRequest().getParameter("name");
????????????? ?try {?
?????????????????? ?? // 对tempFileName进行UTF-8解码
????????????????????? // 这里使用request.setCharacterEncoding解码无效.??
????????????????????? // 只有解码了getDownloadFile()方法才能在下载目录下正确找到请求的文件??
?????????????????????tempFileName = new String(tempFileName .getBytes("ISO-8859-1"), "UTF-8");?
?????????????? ?} catch (Exception e) {?
????????????????????? e.printStackTrace();
??????????????? }
??????????????? ?this.fileName = tempFileName ;?
???????? }
?
?
???? //此方法对应的是struts.xml文件中的：??
?????// <param name="contentDisposition">attachment;filename="${fileName}"</param>??
?????// 这个属性设置的是下载工具下载文件时显示的文件名，??
?????// 要想正确的显示中文文件名，我们需要对fileName再次编码??
???? //否则中文名文件将出现乱码，或无法下载的情况?????
???? public String getFileName() throws UnsupportedEncodingException {
??????????? fileName=new String(fileName.getBytes(),"ISO-8859-1");?
?????????? ?return fileName;
???? }
????
?
???? //此方法对应的是struts.xml文件中的：??
?????// <param name="inputName">downloadFile</param>??
???? //返回下载文件的流，可以参看struts2的源码??
????? public InputStream getDownloadFile() {
??????????? ?this.setFileName();?
???????????? return ServletActionContext.getServletContext().getResourceAsStream("/upload/" + fileName);
??? }
???
??? public String execute() throws Exception {
??????????? return SUCCESS;
??? }
}
?
?
?
struts.xml? 其中的EL表达式，是要注意的
??????? <action name="download" type="stream">
??????????????? <param name="contentDisposition">attachment;filename="${fileName}"</param>?
??????????????? <param name="inputName">downloadFile</param>?
???????? ?????? <!--对应DownloadAction.getDownloadFile()-->
??????????? </result>
??????? </action>
?
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