struts2上传下载
struts上传下载必须引入两个jar文件:
commons-fileupload-x.x.x.jar和comons-io-x.x.x.jar上传文件
import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import org.apache.struts2.ServletActionContext; import pojo.User; import com.opensymphony.xwork2.ActionSupport; public class FileUpAction extends ActionSupport{ private static final int BUFFER_SIZE = 40*40; private File upload; private String uploadContentType; private String uploadFileName; private String savePath; private User user; private static void copy(File source, File target){ InputStream is = null; OutputStream os = null; try{ is = new BufferedInputStream(new FileInputStream(source), BUFFER_SIZE); os = new BufferedOutputStream(new FileOutputStream(target), BUFFER_SIZE); int len = 0; byte[] bs = new byte[BUFFER_SIZE]; while ((len=is.read(bs))!=-1) { os.write(bs, 0, len); } }catch (Exception e) { e.printStackTrace(); }finally{ if(is!=null){ try{ is.close(); }catch (Exception e2) { // TODO: handle exception e2.printStackTrace(); } } if(os!=null){ try{ os.close(); }catch (Exception e3) { // TODO: handle exception e3.printStackTrace(); } } } } @Override public String execute() throws Exception{ String path = ServletActionContext.getServletContext().getRealPath(this.getSavePath())+"\\"+this.getUploadFileName(); user.setPhone(this.uploadFileName); File target = new File(path); copy(this.upload, target); return SUCCESS; } public File getUpload() { return upload; } public void setUpload(File upload) { this.upload = upload; } public String getUploadContentType() { return uploadContentType; } public void setUploadContentType(String uploadContentType) { this.uploadContentType = uploadContentType; } public String getUploadFileName() { return uploadFileName; } public void setUploadFileName(String uploadFileName) { this.uploadFileName = uploadFileName; } public String getSavePath() { return savePath; } public void setSavePath(String savePath) { this.savePath = savePath; } public User getUser() { return user; } public void setUser(User user) { this.user = user; } }
struts2中的action配置
<action name="fileUp" class="actions.FileUpAction"> <param name="savePath">/upload</param> <result>/userInfo.jsp</result> </action>
表单
<s:form action="fileUp" namespace="/" method="post" enctype="multipart/form-data"> <s:textfield name="user.name" label="姓名" size="20"/> <s:file name="upload" label="形象" size="20"/> <s:textfield name="user.age" label="年龄" size="20"/> <s:radio list="#{1:‘男‘,2:‘女‘ }" name="user.sex" listKey="key" listValue="value" value="1" label="性别" cssStyle="border:0px;"/> <s:textfield name="user.icard" label="身份证号" size="20"/> <s:textfield name="user.phone" label="联系电话" size="20"/> <s:textfield name="user.address" label="家庭住址" size="20"/> <s:submit value="确定录入" align="center"/> </s:form>
如果表单中包含一个name属性为xxx的文件域,那么在Action中可以使用如下3个属性来封装文件域信息:
File xxx 封装文件域对应的文件内容
String xxxContextType 封装文件域对应文件的文件类型
String xxxFileName 封装文件域对应文件的文件名
使用图片的时候
<img src="upload/<s:property value="uploadFileName"/>"/>
下载
import com.opensymphony.xwork2.ActionSupport; public class DownloadAction extends ActionSupport{ private String downPath; public InputStream getInputStream() throws Exception{ return ServletActionContext.getServletContext().getResourceAsStream(downPath); } public String getDownPath() { return downPath; } public void setDownPath(String downPath) { this.downPath = downPath; } public String getDownloadFileName(){ String downFileName = downPath.substring(7); try{ downFileName = new String(downFileName.getBytes(), "ISO8859-1"); }catch (Exception e) { e.printStackTrace(); // TODO: handle exception } return downFileName; } @Override public String execute() throws Exception{ return SUCCESS; }
struts2.xml配置
<action name="downLoad" class="actions.DownloadAction"> <result type="stream"> <param name="contentType"> application/msword,text/plain,application/vnd.ms-powerpoint,application/vnd.ms-excel </param> <param name="inputName">inputStream</param> <param name="contentDisposition"> attachment;filename="${downloadFileName}" </param> <param name="bufferSize">40960</param> </result> </action>
使用
<a href="downLoad.action?downPath=upload/123.png">下载</a>
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