Java如何获取Web应用程序的真实路径？
此代码可帮助您获取在服务器上部署Web应用程序的物理路径。这可能很有用，因此您可以在服务器上读取或写入文件。但是请注意，此方法仅在以爆炸方式部署Web应用程序时才有效，如果以某种war格式部署，则该getRealPath()方法只需return即可null。
package org.nhooo.example.servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
public class GetWebApplicationPathServlet extends HttpServlet {
public GetWebApplicationPathServlet() {
super();
}
protected void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
String path = getServletContext().getRealPath("/");
PrintWriter writer = res.getWriter();
writer.println("Application path: " + path);
}
}