Question

用Java的三大框架实现文件的上传下载，求代码啊，最好是分为action,service,serv

用Java的三大框架实现文件的上传下载，求代码啊，最好是分为action,service,serviceimpl,model,dao,daoimpl这种层次的

Answer 1

package cn.itcast.struts2.demo1;

import java.io.File;

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

import com.opensymphony.xwork2.ActionSupport;

/**
* 完成文件上传 （不是解析上传内容，因为上传内容 由fileUpload拦截器负责解析）
*
* @author seawind
*
*/
public class UploadAction extends ActionSupport {
// 接收上传内容
// <input type="file" name="upload" />
private File upload; // 这里变量名 和 页面表单元素 name 属性一致
private String uploadContentType;
private String uploadFileName;

public void setUpload(File upload) {
this.upload = upload;
}

public void setUploadContentType(String uploadContentType) {
this.uploadContentType = uploadContentType;
}

public void setUploadFileName(String uploadFileName) {
this.uploadFileName = uploadFileName;
}

@Override
public String execute() throws Exception {
if (upload == null) { // 通过xml配置 required校验器 完成校验
// 没有上传文件
return NONE;
}
// 将上传文件 保存到服务器端
// 源文件 upload
// 目标文件
File destFile = new File(ServletActionContext.getServletContext()
.getRealPath("/upload") + "/" + uploadFileName);
// 文件复制 使用commons-io包 提供 工具类
FileUtils.copyFile(upload, destFile);
return NONE;
}
}
多文件上传
package cn.itcast.struts2.demo1;

import java.io.File;

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

import com.opensymphony.xwork2.ActionSupport;

/**
* 支持多文件上传
*
* @author seawind
*
*/
public class MultiUploadAction extends ActionSupport {
// 接收多文件上传参数，提供数组接收就可以了
private File[] upload;
private String[] uploadContentType;
private String[] uploadFileName;

public void setUpload(File[] upload) {
this.upload = upload;
}

public void setUploadContentType(String[] uploadContentType) {
this.uploadContentType = uploadContentType;
}

public void setUploadFileName(String[] uploadFileName) {
this.uploadFileName = uploadFileName;
}

@Override
public String execute() throws Exception {
for (int i = 0; i < upload.length; i++) {
// 循环完成上传
File srcFile = upload[i];
String filename = uploadFileName[i];

// 定义目标文件
File destFile = new File(ServletActionContext.getServletContext()
.getRealPath("/upload" + "/" + filename));
FileUtils.copyFile(srcFile, destFile);
}
return NONE;
}
}

追问

有和spring整合以后得吗

追答

没有呀单纯文件上传的话,不用dao层吧,你要把什么内容写入数据库呢