Struts2文件上傳

文件上傳時的三個屬性很重要。加入現在上傳控件為：,那麼上傳文件所對應的Action中應包含如下價格屬性：

private File upload;//封裝上傳文件域的屬性。注意這裡的upload是與標簽中的name是一樣的。

private String uploadContentType;//封裝上傳文件類型的屬性。形如 xxxContentType

private String uploadFileName;//封裝上傳文件名的屬性。xxxFileName.

開發步驟如下：

1、新建一個web工程，導入struts2上傳文件所需jar，如下圖

目錄結構

2、新建Action

第一種方式

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; //上傳的文件
    private String imageFileName; //文件名稱
    private String imageContentType; //文件類型

    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", "文件上傳成功");
        }
        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;
    }

    
}

第二種方式

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 {

    // 封裝上傳文件域的屬性
    private File image;
    // 封裝上傳文件類型的屬性
    private String imageContentType;
    // 封裝上傳文件名的屬性
    private String imageFileName;
    // 接受依賴注入的屬性
    private String savePath;

    @Override
    public String execute() {
        FileOutputStream fos = null;
        FileInputStream fis = null;
        try {
            // 建立文件輸出流
            System.out.println(getSavePath());
            fos = new FileOutputStream(getSavePath() + "\\" + getImageFileName());
            // 建立文件上傳流
            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("文件上傳失敗");
            e.printStackTrace();
        } finally {
            close(fos, fis);
        }
        return SUCCESS;
    }

    /**
     * 返回上傳文件的保存位置
     * 
     * @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關閉失敗");
                e.printStackTrace();
            }
        }
        if (fos != null) {
            try {
                fos.close();
            } catch (IOException e) {
                System.out.println("FileOutputStream關閉失敗");
                e.printStackTrace();
            }
        }
    }

}

struts.xml配置文件

    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
         
    
        
            /WEB-INF/page/message.jsp
        
    
    
    
        
            
            /images
            /WEB-INF/page/message.jsp
            /upload/upload.jsp
            
                
                image/bmp,image/png,image/gif,image/jpeg
                
                1025956
            
            
            
        
    

上傳表單頁面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="/struts-tags" prefix="s" %>



    
        

        
        
        
    

    
        
        
        
        

        
    

顯示結果頁面

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>


  
    
    
    
    
    
        
  
  
  
    上傳成功！
    


    
    ">