struts2第三课.doc

第三课 struts2的文件上传和拦截器、输入校验 文件上传的步骤 建立web工程，引入struts2的组件包，参考前面章节的内容 创建UserBean类，代码如下所示: package com.bean; import java.io.*; public class UserBean { private String uname; private File upfile; private String upfileContentType;//上传文件的类型 private String upfileFileName;//上传文件的文件名称 public String getUname() { return uname; } public void setUname(String uname) { this.uname = uname; } public File getUpfile() { return upfile; } public void setUpfile(File upfile) { this.upfile = upfile; } public String getUpfileContentType() { return upfileContentType; } public void setUpfileContentType(String upfileContentType) { this.upfileContentType = upfileContentType; } public String getUpfileFileName() { return upfileFileName; } public void setUpfileFileName(String upfileFileName) { this.upfileFileName = upfileFileName; } } 在上面代码中属性红色部分对应于表单中文件字段的名称。 创建Action类，UserAction.java,代码如下: package com.action; import java.util.*; import java.io.*; import org.apache.struts.chain.contexts.ServletActionContext; import com.bean.*; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; public class UserAction extends ActionSupport { private String nextpath; private UserBean ubean; private String index; public String getNextpath() { return nextpath; } public void setNextpath(String nextpath) { this.nextpath = nextpath; } public UserBean getUbean() { return ubean; } public void setUbean(UserBean ubean) { this.ubean = ubean; } public String getIndex() { return index; } public void setIndex(String index) { this.index = index; } //上传 public String save(){ Map session=ActionContext.getContext().getSession(); ListUserBean lsub=(ListUserBean) session.get(lsub); if(lsub==null){ lsub=new ArrayListUserBean(); } //获取上传的文件名称 String fname=ubean.getUpfileFileName(); System.out.println(fname); //获取该文件名的后缀 String ext=fname.substring(fname.lastIndexOf(.),fname.length()); System.o