struts2文件下载/绝对路径+相对路径

package download; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.io.InputStream; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; //文件下载 public class FileDownload extends ActionSupport { private int number; private String fileName; private String urlname; public int getNumber() { return number; } public void setNumber(int number) { this.number = number; } public String getFileName() { return fileName; } public void setFileName(String fileName) { this.fileName = fileName; } // 返回一个输入流，作为一个客户端来说是一个输入流，但对于服务器端是一个 输出流 public InputStream getDownloadFile() throws Exception { if (1 == number) { this.fileName = "Dream.jpg"; //File f = new File("C:/Users/Administrator/Pictures/222.jpg"); return new FileInputStream(urlname); // 获取资源路径 //return ServletActionContext.getServletContext().getResourceAsStream(""); } else if (2 == number) { this.fileName = "jd2chm源码生成chm格式文档.rar"; // 解解乱码 this.fileName = new String(this.fileName.getBytes("GBK"), "ISO-8859-1"); //return ServletActionContext.getServletContext().getResourceAsStream("upload/jd2chm源码生成chm格式文档.rar"); return new FileInputStream(urlname); } else return null; } @Override public String execute() throws Exception { return SUCCESS; } public String getUrlname() { return urlname; } public void setUrlname(String urlname) { this.urlname = urlname; } }