struts2之單個與多個文件上傳代碼

通過3種方式模擬多個文件上傳，效果如下所示           目錄結構   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 {
        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", "文件上傳成功");
        }
        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;
    }



    
}

                    第二種方式

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;
/**
 * 使用數組上傳多個文件
 * 
 * @author ljq
 *
 */
@suppresswarnings("serial")
public class uploadaction2 extends actionsupport{
    private file[] image; //上傳的文件
    private string[] imagefilename; //文件名稱
    private string[] imagecontenttype; //文件類型
    private string savepath;

    @override
    public string execute() throws exception {
        servletactioncontext.getrequest().setcharacterencoding("utf-8");
        //取得需要上傳的文件數組
        file[] files = getimage();
        if (files !=null && files.length > 0) {
            for (int i = 0; i < files.length; i++) {
                //建立上傳文件的輸出流, getimagefilename()[i]
                system.out.println(getsavepath() + "" + getimagefilename()[i]);
                fileoutputstream fos = new fileoutputstream(getsavepath() + "" + getimagefilename()[i]);
                //建立上傳文件的輸入流
                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;
    }

    /**
     * 返回上傳文件保存的位置
     * 
     * @return
     * @throws exception
     */
    public string getsavepath() throws exception {
        return servletactioncontext.getservletcontext().getrealpath(savepath);
    }

    public void setsavepath(string savepath) {
        this.savepath = savepath;
    }
    
    
}

             第三種方式

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上傳多個文件
 * 
 * @author ljq
 *
 */
@suppresswarnings("serial")
public class uploadaction3 extends actionsupport {
    private list<file> image; // 上傳的文件
    private list<string> imagefilename; // 文件名稱
    private list<string> imagecontenttype; // 文件類型
    private string savepath;

    @override
    public string execute() throws exception {
        servletactioncontext.getrequest().setcharacterencoding("utf-8");
        // 取得需要上傳的文件數組
        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;
    }

    /**
     * 返回上傳文件保存的位置
     * 
     * @return
     * @throws exception
     */
    public string getsavepath() throws exception {
        return servletactioncontext.getservletcontext().getrealpath(savepath);
    }

    public void setsavepath(string savepath) {
        this.savepath = savepath;
    }

}

               struts.xml配置文件

<?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>
    <!-- 該屬性指定需要struts2處理的請求後綴，該屬性的默認值是action，即所有匹配*.action的請求都由struts2處理。
        如果用戶需要指定多個請求後綴，則多個後綴之間以英文逗號（,）隔開。 -->
    <constant name="struts.action.extension" value="do" />
    <!-- 設置浏覽器是否緩存靜態內容,默認值為true(生產環境下使用),開發階段最好關閉 -->
    <constant name="struts.serve.static.browsercache" value="false" />
    <!-- 當struts的配置文件修改後,系統是否自動重新加載該文件,默認值為false(生產環境下使用),開發階段最好打開 -->
    <constant name="struts.configuration.xml.reload" value="true" />
    <!-- 開發模式下使用,這樣可以打印出更詳細的錯誤信息 -->
    <constant name="struts.devmode" value="true" />
    <!-- 默認的視圖主題 -->
    <constant name="struts.ui.theme" value="simple" />
    <!--<constant name="struts.objectfactory" value="spring" />-->
    <!--解決亂碼    -->
    <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教程</result>
        </action>
    </package>
    <package name="upload1" namespace="/upload1" extends="struts-default">
        <action name="upload1" class="com.ljq.action.uploadaction2" method="execute">
            <!-- 要創建/image文件夾，否則會報找不到文件 -->
            <param name="savepath">/image</param>
            <result name="success">/web-inf/page/message.jsp</result>
        </action>
    </package>
    <package name="upload2" namespace="/upload2" extends="struts-default">
        <action name="upload2" class="com.ljq.action.uploadaction3" method="execute">
            <!-- 要創建/image文件夾，否則會報找不到文件 -->
            <param name="savepath">/image</param>
            <result name="success">/web-inf/page/message.jsp</result>
        </action>
    </package>
</struts>

            上傳表單頁面upload.jsp

<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>

<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
    <head>
        <title>文件上傳</title>

        <meta http-equiv="pragma" content="no-cache">
        <meta http-equiv="cache-control" content="no-cache">
        <meta http-equiv="expires" content="0">
    </head>

    <body>
        <!-- ${pagecontext.request.contextpath}/upload/execute_upload.do -->
        <!-- ${pagecontext.request.contextpath}/upload1/upload1.do -->
        <!-- ${pagecontext.request.contextpath}/upload2/upload2.do -->
        <!--  -->
        <form action="${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="上傳" />
        </form>
    </body>
</html>

顯示頁面message.jsp

<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
  <head>
    
    <title>my jsp 'message.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>
    上傳成功
  <br/>
  <s:debug></s:debug>
  </body>
</html>
 
單文件上傳
過2種方式模擬單個文件上傳，效果如下所示
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-6.0.18webapps教程struts2_uploadimages
        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

<?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>
    <!-- 該屬性指定需要struts2處理的請求後綴，該屬性的默認值是action，即所有匹配*.action的請求都由struts2處理。
        如果用戶需要指定多個請求後綴，則多個後綴之間以英文逗號（,）隔開。 -->
    <constant name="struts.action.extension" value="do" />
    <!-- 設置浏覽器是否緩存靜態內容,默認值為true(生產環境下使用),開發階段最好關閉 -->
    <constant name="struts.serve.static.browsercache" value="false" />
    <!-- 當struts的配置文件修改後,系統是否自動重新加載該文件,默認值為false(生產環境下使用),開發階段最好打開 -->
    <constant name="struts.configuration.xml.reload" value="true" />
    <!-- 開發模式下使用,這樣可以打印出更詳細的錯誤信息 -->
    <constant name="struts.devmode" value="true" />
    <!-- 默認的視圖主題 -->
    <constant name="struts.ui.theme" value="simple" />
    <!--<constant name="struts.objectfactory" value="spring" />-->
    <!--解決亂碼    -->
    <constant name="struts.i18n.encoding" value="utf-8" />
    <!-- 指定允許上傳的文件最大字節數。默認值是2097152(2m) -->
    <constant name="struts.multipart.maxsize" value="10701096"/>
    <!-- 設置上傳文件的臨時文件夾,默認使用javax.servlet.context.tempdir -->
    <constant name="struts.multipart.savedir " value="d:/tmp" />
    
         
    <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</result>
        </action>
    </package>
    
    <package name="upload2" extends="struts-default">
        <action name="upload2" class="com.ljq.action.uploadaction2" method="execute">
            <!-- 動態設置savepath的屬性值 -->
            <param name="savepath">/images</param>
            <result name="success">/web-inf/page/message.jsp</result>
            <result name="input">/upload/upload.jsp</result>
            <interceptor-ref name="fileupload">
                <!-- 文件過濾 -->
                <param name="allowedtypes">image/bmp,image/png,image/gif,image/jpeg</param>
                <!-- 文件大小, 以字節為單位 -->
                <param name="maximumsize">1025956</param>
            </interceptor-ref>
            <!-- 默認攔截器必須放在fileupload之後，否則無效 -->
            <interceptor-ref name="defaultstack" />
        </action>
    </package>
</struts>

           
上傳表單頁面

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

<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
    <head>
        <title>文件上傳</title>

        <meta http-equiv="pragma" content="no-cache">
        <meta http-equiv="cache-control" content="no-cache">
        <meta http-equiv="expires" content="0">
    </head>

    <body>
        <!-- ${pagecontext.request.contextpath}/upload/execute_upload.do -->
        <!-- ${pagecontext.request.contextpath}/upload2/upload2.do -->
        <form action="${pagecontext.request.contextpath}/upload2/upload2.do" 
              enctype="multipart/form-data" method="post">
            文件:<input type="file" name="image">
                <input type="submit" value="上傳" />
        </form>
        <br/>
        <s:fielderror />
    </body>
</html>

           
顯示結果頁面

<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>
<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
  <head>
    
    <title>上傳成功</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
  </head>
  
  <body>
    上傳成功！
    <br/><br/>
    <!-- ${pagecontext.request.contextpath} tomcat部署路徑，
          如：d:apache-tomcat-6.0.18webappsstruts2_upload -->
    <img src="${pagecontext.request.contextpath}/<s:property value="'images/'+imagefilename"/>">
    <s:debug></s:debug>
  </body>
</html>