struts2+DBUtils实现的用户信息增删改查，包含文件上传下载

package cn.itcast.usermng.action; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import org.apache.commons.io.FileUtils; import org.apache.struts2.ServletActionContext; import cn.itcast.commons.CommonUtils; import cn.itcast.usermng.domain.User; import cn.itcast.usermng.service.UserService; import cn.itcast.usermng.utils.DownUtils; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; import com.opensymphony.xwork2.ModelDriven; import com.opensymphony.xwork2.interceptor.annotations.InputConfig; public class UserAction extends ActionSupport implements ModelDriven<User>{ private UserService userService = new UserService(); private User model = new User(); //上传 private File resume; private String resumeFileName; //一个流两个头 private InputStream inputStream; private String type; private String frameName; public InputStream getInputStream() { return inputStream; } public String getType() { return type; } public String getFrameName() { return frameName; } public void setResume(File resume) { this.resume = resume; } /** * 处理文件名称是绝对路径的问题 * @param resumeFileName */ public void setResumeFileName(String resumeFileName) { int index = resumeFileName.lastIndexOf("\\"); if(index != -1){ this.resumeFileName = resumeFileName.substring(index+1); }else{ this.resumeFileName = resumeFileName; } } @Override public User getModel() { return model; } public void setModel(User model) { this.model = model; } /** * 用户登录 * @return */ @InputConfig(resultName="login") public String login(){ User user = userService.login(model.getLoginname(),model.getLoginpass()); if(user == null){ this.addActionError("用户名或密码错误"); return LOGIN; } ServletActionContext.getRequest().getSession().setAttribute("user",user); return SUCCESS; } /*** * 查询所有 * @return */ public String findAll(){ ActionContext.getContext().getValueStack().push(userService.findAll()); return "list"; } /*** * 组合查询 * @return */ public String findByCombination(){ ActionContext.getContext().getValueStack().push(userService.findByCombination(model)); return "list"; } /** * 添加用户 * @return */ public String add(){ //1. 给model添加uid model.setUid(CommonUtils.uuid()); //2. 保存上传的文件(并把文件名称赋给model的filename和filepath) if(resume!=null){ saveResume(model); }else{ model.setFilename(null); model.setFilepath(null); } //3. 调用userService的方法完成向数据库插入记录 userService.add(model); //4、重定向到findAll return "redirectFindAll"; } /** * 查看用户资料 * @return */ public String findByUid(){ ActionContext.getContext().getValueStack().push(userService.load(model.getUid())); return "view"; } /** * 在编辑页面中显示用户信息 * @return */ public String editPre(){ ActionContext.getContext().getValueStack().push(userService.load(model.getUid())); return "edit"; } public String editUser(){ if(resume !=null){ //修改了简历，要删除老简历，增加新简历 deleteResume(model); saveResume(model); } //原来的简历信息已经通过隐藏字段传给model了 userService.editUser(model); return "redirectFindAll"; } /** * 删除简历 * @param model2 */ private void deleteResume(User model) { /*得到File才能删除 * > 得到路径 * > 得到真实名称*/ String path = ServletActionContext.getServletContext().getRealPath("/WEB-INF/resumes"); File destfile = new File(path,model.getFilepath()); if(destfile.exists()){ destfile.delete(); } } /** * 保存简历 * @param model2 */ private void saveResume(User model) { /* 保存文件： * 1. 有源文件: resume * 2. 有目标文件：获取保存路径(/WEB-INF/resumes)，文件名称(真实名称，即带有uuid前缀的名称) * 3. FileUtils.copyFile(src, dest); */ //获取保存路径 String path = ServletActionContext.getServletContext().getRealPath("/WEB-INF/resumes"); //获取文件真实名称 String realname = CommonUtils.uuid() + this.resumeFileName; //目标文件 File destFile = new File(path,realname); //保存文件 try { FileUtils.copyFile(resume, destFile); } catch (IOException e) { e.printStackTrace(); } //给model的filename和filepath赋值 model.setFilename(resumeFileName); model.setFilepath(realname); } /** * 下载简历 * @return */ public String download(){ //通过超链接带过去的参数已经到了model中 try{ String filename = new String(model.getFilename().getBytes("ISO-8859-1"),"utf-8"); String filepath = new String(model.getFilepath().getBytes("ISO-8859-1"),"utf-8"); //找到磁盘上的文件 String path = ServletActionContext.getServletContext().getRealPath("/WEB-INF/resumes"); File file = new File(path,filepath); //得到流，得到mime类型，得到框框中显示的名称 inputStream = new FileInputStream(file); type = ServletActionContext.getServletContext().getMimeType(file.getAbsolutePath()); String agent = ServletActionContext.getRequest().getHeader("User-Agent"); frameName = DownUtils.encodeDownloadFilename(filename, agent); return "download"; }catch(Exception e){ e.printStackTrace(); return null; } } /** * 删除用户资料，需要从数据库中删除该条记录，并删除简历 */ public String delete(){ User user = userService.load(model.getUid()); if(user.getFilename()!=null){ deleteResume(user); } userService.delete(model.getUid()); return "redirectFindAll"; } }