[英]Trouble running servlet application in Intellij Community Edition with tomcat server 8.5
// web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">
<servlet>
<servlet-name>welcome</servlet-name>
<servlet-class>com.rippleworks.WelcomeServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>welcome</servlet-name>
<url-pattern>/welcome</url-pattern>
</servlet-mapping>
</web-app>
// WelcomeServlet.java
package com.rippleworks;
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.PrintStream;
public class WelcomeServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
super.doGet(req, resp);
PrintStream out = new PrintStream(resp.getOutputStream());
out.println("Hello students!");
}
}
// index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>HEllo world!</h1>
</body>
</html>
我已將Intellij配置為使用本地tomcat安裝。 當我部署項目時,似乎只有index.jsp起作用。 / welcome路徑的http請求給出405。我做錯了什么?
servlet映射似乎是錯誤的。
<servlet>
<servlet-name>WelcomeServlet</servlet-name>
<servlet-class>com.rippleworks.WelcomeServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>WelcomeServlet</servlet-name>
<url-pattern>/welcome</url-pattern>
</servlet-mapping>
和您的servlet:
public class WelcomeServlet extends HttpServlet {
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//do whatever you want here
//forward request to index
RequestDispatcher rd=req.getRequestDispatcher("index.jsp");
rd.forward(req,resp);
}
}
試試看,讓我知道它是否適合您。 嘗試之前,請記住重新啟動服務器。
是導致問題的super.doGet(..)。 從HttpServlet的源代碼中,默認實現是這樣,
public void doGet(..) {
String protocol = req.getProtocol();
String msg = lStrings.getString("http.method_get_not_supported");
if (protocol.endsWith("1.1")) {
resp.sendError(405, msg);
} else {
resp.sendError(400, msg);
}
}
它將始終以錯誤響應。 刪除了對super方法的調用,現在可以正常使用了。
PS。 感謝大家的答復。
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