Struts图片上传/文件上传

图片上传：

效果图：

项目结构：

上传图片页面UploadImg.jsp：

<form action="upload" method="post" enctype="multipart/form-data">
    <input type="file" name="image">
    <input type="submit" value="上传">
</form>

上传图片成功页面success.jsp：

<input type="image" src="/UploadStruts2${imgPath }" alt="${imgName }" style="whith:200px;height:300px;">

web.xml:

<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <welcome-file-list>
    <welcome-file>UploadImg.jsp</welcome-file>
  </welcome-file-list>
  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>
         org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

struts.xml:

<?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>
   <package name="default" extends="struts-default">
     
      
      <!-- 图片上传action -->
	<action name="upload" class="cn.xxs.action.UploadAction" method="upload">
		<!-- 配置默认拦截器栈 -->
		<interceptor-ref name="defaultStack">
		</interceptor-ref>
		<!-- 引入文件上传的拦截器 -->
		<interceptor-ref name="fileUpload">
			<!-- 配置允许的文件格式 -->
			<param name="allowedTypes">application/pdf,text/plain,image/bmp,image/png,image/jpg</param>
			<!-- 文件大小 -->
			<param name="maxmumSize">5242880</param>
		</interceptor-ref>
		<result name="success">success.jsp</result>
	</action>
   </package>
</struts>

BaseAction.java

package cn.xxs.action;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class BaseAction extends ActionSupport{
	/**
	 * 获取request
	 * @return
	 */
public HttpServletRequest getRequest() {
		
		return ServletActionContext.getRequest();
	}
	/**
	 * 获取Response
	 * @return
	 */
	public HttpServletResponse getResponse() {
		
		return ServletActionContext.getResponse();
	}
	
	/**
	 * 获取HttpSession
	 */
	public HttpSession getSession() {
		
		return getRequest().getSession();
		
	}
}

UploadAction.java:

package cn.xxs.action;

import java.io.File;
import java.io.IOException;

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

public class UploadAction extends BaseAction{
	private File image;
	private String imageFileName;
	private String imageContentType;
	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;
	}
	/**
	 * 图片上传
	 */
	public String upload() {
		//1.获取upload文件在服务器tomcat中的路径
		String path = getSession().getServletContext().getRealPath("/upload");
		//2.创建一个文件，需要传入路径
		File file = new File(path);
		//3.判断文件夹是否存在，不存在，则新建一个文件夹
		if(file.exists()) {
			file.mkdirs();
		}
		//4.获取图片在tomcat中的真实路径
		String realPath = path + "/" + imageFileName;
		//5.判断图片是否存在，存在则删除
		File f = new File(realPath);
		if(f.exists()) {
			f.delete();
		}
		//6.把图片copy到tomcat中的upload文件夹中
		try {
			FileUtils.copyFile(image, f);
		}catch(IOException e){
			e.printStackTrace();
		}
		//7.可以获取图片名字在页面显示
		String imgName = imageFileName.substring(0,imageFileName.lastIndexOf("."));
		String imgPath = "/upload/"+imageFileName;
		//8.把图片名字，路径返回到前台
		getRequest().setAttribute("imgPath", imgPath);
		getRequest().setAttribute("imgName", imgName);
		
		return "success";
		
		
	}
}

文件上传：

效果图：

项目结构：

上传文件页面index.jsp：

<form action="upload" method="post" enctype="multipart/form-data">
        文件：<input type="file" name="myFile"><br>
        <input type="submit" value="提交">
    </form>

上传文件成功页面success.jsp：

fileName:${myFileFileName }<br>
    myFileContentType:${myFileContentType }<br>
    Name"${myFile.name }"

web.xml:

<?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" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

struts.xml:

<?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.custom.i18n.resources" value="UTF-8"></constant>
	<!-- 当struts.xml配置文件发生修改，会立刻加载，在生产环境下最好不要配置 -->
	<constant name="struts.configuration.xml.reload" value="true"/>
	<!-- 需要继承struts-default包，这样就拥有的最基本的功能 -->
	<package name="upload" extends="struts-default">
		<action name="upload" class="com.xxs.action.UploadFileAction">
			<result>/success.jsp</result>
		</action>
	</package>
 
</struts>

UploadFileAction.java：

package com.xxs.action;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
 

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

import com.opensymphony.xwork2.Action;
 
public class UploadFileAction {
 
	private String title;
	
	//可以得到上传文件的名称
	//规则：输入域的名称+固定字符串FileName
	private String myFileFileName;
	
	//取得文件数据
	//规则：File 输入域的名称
	private File myFile;
 
	//取得内容类型
	//规则：输入域的名称+固定字符串ContentType
	private String myFileContentType;
	
	public String getMyFileContentType() {
		return myFileContentType;
	}
 
	public void setMyFileContentType(String myFileContentType) {
		this.myFileContentType = myFileContentType;
	}
 

	public String getMyFileFileName() {
		return myFileFileName;
	}
 
	public void setMyFileFileName(String myFileFileName) {
		this.myFileFileName = myFileFileName;
	}
 
	public File getMyFile() {
		return myFile;
	}
 
	public void setMyFile(File myFile) {
		this.myFile = myFile;
	}
	
	public String execute(){
        System.out.println("fileName:"+this.getMyFileFileName());
        System.out.println("contentType:"+this.getMyFileContentType());
        System.out.println("File:"+this.getMyFile());
        
        //获取要保存文件夹的物理路径(绝对路径)
        String realPath=ServletActionContext.getServletContext().getRealPath("/upload");
        File file = new File(realPath);
        
        //测试此抽象路径名表示的文件或目录是否存在。若不存在，创建此抽象路径名指定的目录，包括所有必需但不存在的父目录。
        if(!file.exists())file.mkdirs();
        
        try {
            //保存文件
            FileUtils.copyFile(myFile, new File(file,myFileFileName));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "success";
    }

}