用JavaScript，Struts2和MVC模式做增删改查

package com.zzy.struts; import java.io.File; import org.apache.commons.io.FileUtils; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; import com.zzy.entity.Entity; import com.zzy.entityimp.EntityImp; @SuppressWarnings("serial") public class AdminAdds extends ActionSupport { private int id; private String name; private String author; private String pulish; private Double price; private int currcount; private File upload; private String uploadFileName; public String adds() throws Exception{ EntityImp ei=new EntityImp(); Entity ey=new Entity(name, author, pulish,price,currcount,"upload/"+uploadFileName); int count=ei.adds(ey); if(count>0){ String filename=ServletActionContext.getServletContext().getRealPath("/upload"); filename+=File.separator+uploadFileName; File file=new File(filename); FileUtils.copyFile(upload, file); return "success"; }else{ return "error"; } } public String dels(){ EntityImp ei=new EntityImp(); Entity ey=ei.selects(id); String path=ey.getPicture(); if(ei.dels(id)>0){ String filename=ServletActionContext.getServletContext().getRealPath(path); File f=new File(filename); if(f.exists()){ f.delete(); } return SUCCESS; }else{ return ERROR; } } public String update() throws Exception{ //调用对象方法 EntityImp ei=new EntityImp(); //根据id获取信息 Entity ey=null; ey=ei.selects(id); String path=ey.getPicture(); //判断图片是否为空 if(uploadFileName==null && upload==null){ //如果为空，将获取的信息填入到实体中 ey= new Entity(id,name, author, pulish,price,currcount,path); }else{ ey=new Entity(id,name, author, pulish,price,currcount,"upload/"+uploadFileName); } int count=ei.update(ey); if(count>0){ if(uploadFileName!=null && upload!=null){ String fi=ServletActionContext.getServletContext().getRealPath(path); File f=new File(fi); if(f.exists()){ f.delete(); } String filename=ServletActionContext.getServletContext().getRealPath("/upload"); filename+=File.separator+uploadFileName; File file=new File(filename); FileUtils.copyFile(upload, file); } return SUCCESS; }else{ return ERROR; } } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAuthor() { return author; } public void setAuthor(String author) { this.author = author; } public String getPulish() { return pulish; } public void setPulish(String pulish) { this.pulish = pulish; } public Double getPrice() { return price; } public void setPrice(Double price) { this.price = price; } public int getCurrcount() { return currcount; } public void setCurrcount(int currcount) { this.currcount = currcount; } public File getUpload() { return upload; } public void setUpload(File upload) { this.upload = upload; } public String getUploadFileName() { return uploadFileName; } public void setUploadFileName(String uploadFileName) { this.uploadFileName = uploadFileName; } }