Struts2_单文件上传

Love The Way You Lie 2022-06-14 23:19 169阅读 0赞

第一步:在WEB-INF/lib下加入commons-fileupload-x.x.x.jar、commons-io-x.x.x.jar。这两个文件可以从
    	http://commons.apache.org/下载
    	第二步:把form表的enctype设置为:"multipart/form-data",如下:
    	<form enctype="multipart/form-data"
    		action="<%=request.getContextPath()%>/demo/fileUp_execute.action"
    		method="post">
    		文件:<input type="file" name="image" /> <input type="submit" value="上传" />
    	</form>
    	第三步:
    		在Action类中添加以下属性:
    			private File image;// 得到上传的文件
    			private String imageFileName;// 得到文件的名称
    			private String imageContentType;// 得到文件的类型
    			
    			public String execute() throws IOException {
    				String realpath = ServletActionContext.getServletContext().getRealPath("/images");
    				System.out.println(realpath);
    				if (image != null) {
    					// images/
    					File savefile = new File(new File(realpath), imageFileName);
    					if (!savefile.getParentFile().exists()) {
    						savefile.getParentFile().mkdir();
    					}
    					FileUtils.copyFile(image, savefile);
    					ActionContext.getContext().put("message", "上传成功");
    				}
    				return "success";
    			}

package cn.itcast.g_action;
    
    import java.io.File;
    import java.io.IOException;
    
    import org.apache.commons.io.FileUtils;
    import org.apache.struts2.ServletActionContext;
    
    import com.opensymphony.xwork2.ActionContext;
    
    public class HelloWorldAction {
    	private File image;// 得到上传的文件
    	private String imageFileName;// 得到文件的名称
    	private String imageContentType;// 得到文件的类型
    
    	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;
    	}
    
    	public File getImage() {
    		return image;
    	}
    
    	public void setImage(File image) {
    		this.image = image;
    	}
    
    	public String execute() throws IOException {
    		String realpath = ServletActionContext.getServletContext().getRealPath("/images");
    		System.out.println(realpath);
    		if (image != null) {
    			// images/
    			File savefile = new File(new File(realpath), imageFileName);
    			if (!savefile.getParentFile().exists()) {
    				savefile.getParentFile().mkdir();
    			}
    			FileUtils.copyFile(image, savefile);
    			ActionContext.getContext().put("message", "上传成功");
    		}
    		return "success";
    	}
    }

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC
    	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    	"http://struts.apache.org/dtds/struts-2.3.dtd">
    
    <struts>
    	<package name="itcast" namespace="/demo" extends="struts-default">
    		<action name="fileUp_*" class="cn.itcast.g_action.HelloWorldAction" method="{1}">
    			<result name="success">/WEB-INF/page/message.jsp</result>
    		</action>
    	</package>
    </struts>

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC
    	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    	"http://struts.apache.org/dtds/struts-2.3.dtd">
    
    <struts>
    	
    	<constant name="struts.action.extension" value="com,action"></constant>
    	
    	<constant name="struts.enable.DynamicMethodlnvocation" value="false" />
    	
    	<constant name="struts.i18n.encoding" value="UTF-8" />
    	  
    <constant name"struts.multipart.maxSize" value="10701096"/>  
    
    	
    	<include file="struts_file_one.xml" />
    </struts>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    
    </head>
    
    <body>
    	<form enctype="multipart/form-data"
    		action="<%=request.getContextPath()%>/demo/fileUp_execute.action"
    		method="post">
    		文件:<input type="file" name="image" /> <input type="submit" value="上传" />
    	</form>
    </body>
    </html>

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    <html>
    <head>
    
    <title>My JSP 'msessage.jsp' starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    
    
    </head>
    
    <body>
    	${message }
    </body>
    </html>