java Servlet 错误 HTTP 状态 405 - 此 URL 不支持 HTTP 方法 GET
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Servlet error HTTP Status 405 - HTTP method GET is not supported by this URL
提问by Luna NA
I've written the following Servlet (Search1.java):
我编写了以下 Servlet (Search1.java)：
package ergasia;
import java.sql.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.ArrayList;
public class Search1 extends HttpServlet
{
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
response.setContentType("text/html");
Connection connection= null;
String url = "jdbc:mysql://localhost:3306/";
String dbName = "ergasia";
String user = "root";
String password = "password";
PreparedStatement selectProteins = null;
ResultSet resultSet = null;
ArrayList al = null;
try {
connection = DriverManager.getConnection(url + dbName, user, password);
String keyword = request.getParameter("keyword");
selectProteins = connection.prepareStatement("SELECT * FROM protein WHERE proteinName LIKE ?");
selectProteins.setString(1, "%" + keyword + "%");
resultSet = selectProteins.executeQuery();
ArrayList keyword_list = new ArrayList();
while (resultSet.next()) {
al = new ArrayList();
al.add(resultSet.getString(1));
al.add(resultSet.getString(2));
al.add(resultSet.getString(3));
al.add(resultSet.getString(4));
al.add(resultSet.getString(5));
al.add(resultSet.getString(6));
al.add(resultSet.getString(7));
keyword_list.add(al);
}
request.setAttribute("results", keyword_list);
RequestDispatcher view = request.getRequestDispatcher("/search_proteins.jsp");
view.forward(request, response);
} catch (SQLException e) {
e.printStackTrace();
}
}
@Override
public String getServletInfo() {
return "info";
}
}
that I access from a jsp page with the following command:
我使用以下命令从 jsp 页面访问：
<form method="post" action="/ergasia/Search1">
but when I try to run it tomcat gives me the following error: HTTP Status 405 - HTTP method GET is not supported by this URL type:Status report message:HTTP method GET is not supported by this URL description:The specified HTTP method is not allowed for the requested resource.
但是当我尝试运行它时，tomcat 给了我以下错误：HTTP 状态 405 - 此 URL 类型不支持 HTTP 方法 GET：状态报告消息：此 URL 不支持 HTTP 方法 GET 说明：指定的 HTTP 方法不是允许请求的资源。
Here's my web.xml file too:
这也是我的 web.xml 文件：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>Search_proteins</servlet-name>
<servlet-class>ergasia.Search1</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>Search_proteins</servlet-name>
<url-pattern>/Search_proteins</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
Could you please help me find what I've done wrong?
你能帮我找出我做错了什么吗？
Unfortunately I can't post images yet, so here is my configuration, maybe it'll help:1
不幸的是我还不能发布图片，所以这是我的配置，也许它会有所帮助：1
采纳答案by Java
You servlet doesn't have url-pattern as /ergasia/Search1, try this instead:
你的 servlet 没有 url-pattern as /ergasia/Search1，试试这个：
<form method="post" action="Search_proteins">
回答by Java
Try this one :
试试这个：
<form action="/Search_proteins" method="post">
with url mapping as :
使用 url 映射为：
<servlet-mapping>
<servlet-name>Search_proteins</servlet-name>
<url-pattern>/Search_proteins</url-pattern>
</servlet-mapping>
回答by Ye Win
When, we write method="get" in form action, doGet() is written in Servlets, if method="post", then doPost() is written. But your error "HTTP method GET is not supported by this URL"is wired because your code form action and doPost() method is correct. I think some configuration are wrong in web.xml.
当，我们在form action中写method="get"时，在Servlets中写doGet()，如果method="post"，则写doPost()。但是您的错误“此 URL 不支持 HTTP 方法 GET”是错误的，因为您的代码表单操作和 doPost() 方法是正确的。我认为 web.xml 中的某些配置是错误的。
Please change below code in your web.xml.
请在您的 web.xml 中更改以下代码。
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<servlet>
<servlet-name>eservlet</servlet-name>
<servlet-class>ergasia</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>eservlet</servlet-name>
<url-pattern>/Search1</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
