struts多资料上传 _Web前端

struts多文件上传

1. 页面使用freemerk技术设计

?test.ftl

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>文件上传操作</title>

<script>

  function addFiles(){
     var filesDiv = document.getElementById("files");
     var fileInput = document.createElement("input");

	 fileInput.type="file";
	 fileInput.name="files";
		
	 var delButton = document.createElement("input");
	 delButton.type="button";
	 delButton.value="删除";
		
	 delButton.onclick=function del(){
	      this.parentNode.parentNode.removeChild(this.parentNode);
		}
	 var div = document.createElement("div");
	 div.appendChild(fileInput);
	 div.appendChild(delButton);
	 filesDiv.appendChild(div);
  }
  
  function upLoad(){
     document.form.action = "upLoad.action";
     document.form.submit();
  }
  
  function down(){
     document.form.action = "downloadList.action";
     document.form.submit();
  }
</script>
</head>
<body>
   <form id="form" name="form" enctype="multipart/form-data"  method="post">
   <table>
   <tr><td><input type="button" value="添加文件" onclick="addFiles();"/></td></tr>
   <tr><td><input type="file" name="files"/></td><td></td></tr>
   <tr><td><div id="files"></div></td><td></td></tr>
   <tr><td><input type="button" onclick="upLoad();" value="文件上传"/></td></tr>
   </table>
   
   </form>
</body>
</html>

?2.web.xml核心配置注意使用最新的filter

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <!-- <display-name>excel</display-name>
  <welcome-file-list>
    <welcome-file>user.jsp</welcome-file>
  </welcome-file-list> -->
 <!--   <context-param>
      <param-name>contextConfigLocation</param-name>
 	  <param-value>/WEB-INF/applicationContext.xml</param-value>
  </context-param> -->
<!--   <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>  -->
  <filter>
     <filter-name>struts</filter-name>
     <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  
  <filter-mapping>
     <filter-name>struts</filter-name>
     <url-pattern>*.action</url-pattern>
  </filter-mapping>
  
</web-app>

?3.action

package com.daizhaoyun.action;

import java.io.File;
/*import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;*/
import java.io.IOException;
/*import java.io.InputStream;
import java.io.OutputStream;*/
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class FileUpAction extends ActionSupport {

	private List<File> files;
	private List<String> filesFileName;
	private List<String> filesContentType;

	public List<File> getFiles() {
		return files;
	}

	public void setFiles(List<File> files) {
		this.files = files;
	}

	public List<String> getFilesFileName() {
		return filesFileName;
	}

	public void setFilesFileName(List<String> filesFileName) {
		this.filesFileName = filesFileName;
	}

	public List<String> getFilesContentType() {
		return filesContentType;
	}

	public void setFilesContentType(List<String> filesContentType) {
		this.filesContentType = filesContentType;
	}

	public String inter() {
		return SUCCESS;
	}

	/**
	 * 批量上传文件
	 */
	public String upLoad() {
		/*if (files != null) {
			int i = 0;
			for (; i < files.size(); i++) {
				try {
					InputStream is = new FileInputStream(files.get(i));
					String path = ServletActionContext.getServletContext().getRealPath("/upload/");
					//下一级目录
					OutputStream os = new FileOutputStream(path+File.separator+filesFileName.get(i));
					byte buffer[] = new byte[8192];
					int count = 0;
					while ((count = is.read(buffer)) > 0) {
						os.write(buffer, 0, count);
					}
					os.close();
					is.close();
				} catch (FileNotFoundException e) {
					e.printStackTrace();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}*/
		
		String path = ServletActionContext.getServletContext().getRealPath("/upload/");
		if(files!=null){
			File savedir = new File(path);
			if(!savedir.exists()){
				savedir.mkdirs();
			}
			for(int i=0;i<files.size();i++){
				File saveFile = new File(savedir,filesFileName.get(i));
				try {
					FileUtils.copyFile(files.get(i), saveFile);
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
		return SUCCESS;
	}
}

4.struts核心配置

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
 
    <!-- <constant name="struts.objectFactory" value="org.apache.struts2.spring.StrutsSpringObjectFactory"/> -->
    <constant name="struts.multipart.saveDir" value="/tmp"></constant>
    <constant name="struts.i18n.encoding" value="utf-8"></constant>
    <constant name="struts.multipart.maxSize" value="209715200" />
    
    <package name="file" extends="struts-default" namespace="/">
        <action name="inter" class="com.daizhaoyun.action.FileUpAction" method="inter">
            <result name="success" type="freemarker">
                /WEB-INF/test.ftl
            </result>
        </action>
        
        <action name="upLoad" class="com.daizhaoyun.action.FileUpAction" method="upLoad">
            <result name="success" type="freemarker">
                /WEB-INF/test.ftl
            </result>
        </action>
    </package>
</struts>

?5.访问路径以inter.action进行访问