struts2之单个文件上传
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通过2种方式模拟单个文件上传，效果如下所示
开发步骤如下：
1、新建一个web工程，导入struts2上传文件所需jar，如下图
目录结构
2、新建Action
第一种方式
package com.ljq.action; import java.io.File; import org.apache.commons.io.FileUtils; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings( " serial " ) public class UploadAction extends ActionSupport{ private File image; // 上传的文件 private String imageFileName; // 文件名称 private String imageContentType; // 文件类型 public String execute() throws Exception { String realpath = ServletActionContext.getServletContext().getRealPath( " /images " ); // D:\apache-tomcat-6.0.18\webapps\struts2_upload\images System.out.println( " realpath: " + 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 " , " 文件上传成功 " ); } return " success " ; } 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; } }
第二种方式
package com.ljq.action; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings( " serial " ) public class UploadAction2 extends ActionSupport { // 封装上传文件域的属性 private File image; // 封装上传文件类型的属性 private String imageContentType; // 封装上传文件名的属性 private String imageFileName; // 接受依赖注入的属性 private String savePath; @Override public String execute() { FileOutputStream fos = null ; FileInputStream fis = null ; try { // 建立文件输出流 System.out.println(getSavePath()); fos = new FileOutputStream(getSavePath() + " \\ " + getImageFileName()); // 建立文件上传流 fis = new FileInputStream(getImage()); byte [] buffer = new byte [ 1024 ]; int len = 0 ; while ((len = fis.read(buffer)) > 0 ) { fos.write(buffer, 0 , len); } } catch (Exception e) { System.out.println( " 文件上传失败 " ); e.printStackTrace(); } finally { close(fos, fis); } return SUCCESS; } /** * 返回上传文件的保存位置 * * @return */ public String getSavePath() throws Exception{ return ServletActionContext.getServletContext().getRealPath(savePath); } public void setSavePath(String savePath) { this .savePath = savePath; } public File getImage() { return image; } public void setImage(File image) { this .image = image; } public String getImageContentType() { return imageContentType; } public void setImageContentType(String imageContentType) { this .imageContentType = imageContentType; } public String getImageFileName() { return imageFileName; } public void setImageFileName(String imageFileName) { this .imageFileName = imageFileName; } private void close(FileOutputStream fos, FileInputStream fis) { if (fis != null ) { try { fis.close(); } catch (IOException e) { System.out.println( " FileInputStream关闭失败 " ); e.printStackTrace(); } } if (fos != null ) { try { fos.close(); } catch (IOException e) { System.out.println( " FileOutputStream关闭失败 " ); e.printStackTrace(); } } }}
struts.xml配置文件
< struts > < constant name = " struts.action.extension " value = " do " /> < constant name = " struts.serve.static.browserCache " value = " false " /> < constant name = " struts.configuration.xml.reload " value = " true " /> < constant name = " struts.devMode " value = " true " /> < constant name = " struts.ui.theme " value = " simple " /> < constant name = " struts.i18n.encoding " value = " UTF-8 " /> < constant name = " struts.multipart.maxSize " value = " 10701096 " /> < constant name = " struts.multipart.saveDir " value = " d:/tmp " /> < package name = " upload " namespace = " /upload " extends = " struts-default " > < action name = " *_upload " class = " com.ljq.action.UploadAction " method = " {1} " > < result name = " success " >/ WEB - INF / page / message.jsp < package name = " upload2 " extends = " struts-default " > < action name = " upload2 " class = " com.ljq.action.UploadAction2 " method = " execute " > < param name = " savePath " >/ images < result name = " success " >/ WEB - INF / page / message.jsp < result name = " input " >/ upload / upload.jsp < interceptor - ref name = " fileUpload " > < param name = " allowedTypes " > image / bmp,image / png,image / gif,image / jpeg < param name = " maximumSize " > 1025956 < interceptor - ref name = " defaultStack " />
上传表单页面
<% @ page language = " java " import = " java.util.* " pageEncoding = " UTF-8 " %> <% @taglib uri = " /struts-tags " prefix = " s " %> < html > < head > < title > 文件上传 < meta http - equiv = " pragma " content = " no-cache " > < meta http - equiv = " cache-control " content = " no-cache " > < meta http - equiv = " expires " content = " 0 " > < body > < form action = " ${pageContext.request.contextPath}/upload2/upload2.do " enctype = " multipart/form-data " method = " post " > 文件: < input type = " file " name = " image " > < input type = " submit " value = " 上传 " /> < br /> < s:fielderror />
显示结果页面
<% @ page language = " java " import = " java.util.* " pageEncoding = " UTF-8 " %> <% @ taglib uri = " /struts-tags " prefix = " s " %> < html > < head > < title > 上传成功 < meta http - equiv = " pragma " content = " no-cache " > < meta http - equiv = " cache-control " content = " no-cache " > < meta http - equiv = " expires " content = " 0 " > < body > 上传成功！ < br />< br /> < img src = " ${pageContext.request.contextPath}/ 转载地址：http://rdnni.baihongyu.com/
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