struts2之多个文件上传
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通过3种方式模拟多个文件上传，效果如下所示
目录结构
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 { ServletActionContext.getRequest().setCharacterEncoding( " UTF-8 " ); String realpath = ServletActionContext.getServletContext().getRealPath( " /images " ); System.out.println(realpath); if (image != null ) { File savedir = new File(realpath); if ( ! savedir.getParentFile().exists()) savedir.getParentFile().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 " , " 文件上传成功 " ); } return " success " ; } 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; } }
第二种方式
package com.ljq.action; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; /** * 使用数组上传多个文件 * * */ @SuppressWarnings( " serial " ) public class UploadAction2 extends ActionSupport{ private File[] image; // 上传的文件 private String[] imageFileName; // 文件名称 private String[] imageContentType; // 文件类型 private String savePath; @Override public String execute() throws Exception { ServletActionContext.getRequest().setCharacterEncoding( " UTF-8 " ); // 取得需要上传的文件数组 File[] files = getImage(); if (files != null && files.length > 0 ) { for ( int i = 0 ; i < files.length; i ++ ) { // 建立上传文件的输出流, getImageFileName()[i] System.out.println(getSavePath() + " \\ " + getImageFileName()[i]); FileOutputStream fos = new FileOutputStream(getSavePath() + " \\ " + getImageFileName()[i]); // 建立上传文件的输入流 FileInputStream fis = new FileInputStream(files[i]); byte [] buffer = new byte [ 1024 ]; int len = 0 ; while ((len = fis.read(buffer)) > 0 ) { fos.write(buffer, 0 , len); } fos.close(); fis.close(); } } 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; } /** * 返回上传文件保存的位置 */ public String getSavePath() throws Exception { return ServletActionContext.getServletContext().getRealPath(savePath); } public void setSavePath(String savePath) { this .savePath = savePath; } }
第三种方式
package com.ljq.action; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.List; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; /** * 使用List上传多个文件 * */ @SuppressWarnings( " serial " ) public class UploadAction3 extends ActionSupport { private List < File > image; // 上传的文件 private List < String > imageFileName; // 文件名称 private List < String > imageContentType; // 文件类型 private String savePath; @Override public String execute() throws Exception { ServletActionContext.getRequest().setCharacterEncoding( " UTF-8 " ); // 取得需要上传的文件数组 List < File > files = getImage(); if (files != null && files.size() > 0 ) { for ( int i = 0 ; i < files.size(); i ++ ) { FileOutputStream fos = new FileOutputStream(getSavePath() + " \\ " + getImageFileName().get(i)); FileInputStream fis = new FileInputStream(files.get(i)); byte [] buffer = new byte [ 1024 ]; int len = 0 ; while ((len = fis.read(buffer)) > 0 ) { fos.write(buffer, 0 , len); } fis.close(); fos.close(); } } return SUCCESS; } public List < File > getImage() { return image; } public void setImage(List < File > image) { this .image = image; } public List < String > getImageFileName() { return imageFileName; } public void setImageFileName(List < String > imageFileName) { this .imageFileName = imageFileName; } public List < String > getImageContentType() { return imageContentType; } public void setImageContentType(List < String > imageContentType) { this .imageContentType = imageContentType; } /** * 返回上传文件保存的位置 */ public String getSavePath() throws Exception { return ServletActionContext.getServletContext().getRealPath(savePath); } public void setSavePath(String savePath) { this .savePath = savePath; }}
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 " /> < 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 = " upload1 " namespace = " /upload1 " extends = " struts-default " > < action name = " upload1 " class = " com.ljq.action.UploadAction2 " method = " execute " > < param name = " savePath " >/ image < result name = " success " >/ WEB - INF / page / message.jsp < package name = " upload2 " namespace = " /upload2 " extends = " struts-default " > < action name = " upload2 " class = " com.ljq.action.UploadAction3 " method = " execute " > < param name = " savePath " >/ image < result name = " success " >/ WEB - INF / page / message.jsp
上传表单页面upload.jsp
<% @ page language = " java " import = " java.util.* " pageEncoding = " UTF-8 " %> < 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 = " 上传 " /> 显示页面message.jsp
<% @ page language = " java " import = " java.util.* " pageEncoding = " UTF-8 " %> <% @ taglib uri = " /struts-tags " prefix = " s " %> < html > < head > < title > My JSP ' message.jsp ' starting page < 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 /> < s:debug >
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