HTTP Status 405 – Method Not Allowed in Apache Tomcat Server [duplicate] - servlets

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HTTP Status 405 - HTTP method is not supported by this URL
(2 answers)
Closed 1 year ago.
I am encountering HTTP Status 405 – Method Not Allowed error in my Java Backend.
I am using Apache Tomcat Server
Type Status Report
Message HTTP method GET is not supported by this URL
Description The method received in the request-line is known by the origin server but not supported by the target resource.
Here is the screenshot:
My Web.xml file:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>Backend</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<filter>
<filter-name>CorsFilter</filter-name>
<filter-class>org.apache.catalina.filters.CorsFilter</filter-class>
<init-param>
<param-name>cors.allowed.origins</param-name>
<param-value>http://localhost:3000</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CorsFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<servlet>
<servlet-name>BatchDisplay</servlet-name>
<servlet-class>com.hello.BatchDisplay</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>BatchDisplay</servlet-name>
<url-pattern>/BatchDisplay.do</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>AddServlet</servlet-name>
<servlet-class>com.hello.AddServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>AddServlet</servlet-name>
<url-pattern>/AddServlet.do</url-pattern>
</servlet-mapping>
</web-app>
When I am executing Post request from Postman, I am getting this error.
My Java backend code:
package com.hello;
import java.io.*;
import java.sql.*;
import javax.servlet.ServletException;
import javax.servlet.http.*;
public class AddServelet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doPost(HttpServletRequest request,HttpServletRequest response) throws ServletException
{
try {
String custNumber=request.getParameter("cust_number");
String nameCustomer=request.getParameter("name_customer");
String invoiceID=request.getParameter("invoice_id");
Double TotalOpenAmount=Double.parseDouble(request.getParameter("total_open_amount"));
String dueinDATE=request.getParameter("due_in_date");
String Notes=request.getParameter("notes");
System.out.print("Acquiring Connection");
Connection connection = DriverManager.getConnection("com.mysql.jdbc.Driver", "root", "abcd");
System.out.print("Connected Successfully");
String sql="INSERT INTO invoice
invoice_details(cust_number,name_customer,invoice_id,total_open_amount,due_in_date,notes)
VALUES (?,?,?,?,?,?)";
PreparedStatement statement = connection.prepareStatement(sql);
statement.setString(1, nameCustomer);
statement.setString(2, custNumber);
statement.setString(3, invoiceID);
statement.setDouble(4, TotalOpenAmount);
statement.setString(5, dueinDATE);
statement.setString(6, Notes);
statement.executeUpdate();
}
catch(SQLException e){
e.printStackTrace();
}
finally
{
}
}
}
I really don't know why is it giving such an error.
Please suggest me a way to debug it.

Answer 1

You need to override doGet method if u wanna call by GET method;
#Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
String custNumber=request.getParameter("cust_number");
String nameCustomer=request.getParameter("name_customer");
String invoiceID=request.getParameter("invoice_id");
Double TotalOpenAmount=Double.parseDouble(request.getParameter("total_open_amount"));
String dueinDATE=request.getParameter("due_in_date");
String Notes=request.getParameter("notes");
System.out.print("Acquiring Connection");
Connection connection = DriverManager.getConnection("com.mysql.jdbc.Driver", "root", "abcd");
System.out.print("Connected Successfully");
String sql="INSERT INTO invoice
invoice_details(cust_number,name_customer,invoice_id,total_open_amount,due_in_date,notes)
VALUES (?,?,?,?,?,?)";
PreparedStatement statement = connection.prepareStatement(sql);
statement.setString(1, nameCustomer);
statement.setString(2, custNumber);
statement.setString(3, invoiceID);
statement.setDouble(4, TotalOpenAmount);
statement.setString(5, dueinDATE);
statement.setString(6, Notes);
statement.executeUpdate();
}
catch(SQLException e){
e.printStackTrace();
}
finally
{
}
}
When you need to use GET method: override doGet(HttpServletRequest request, HttpServletResponse response), POST- doPost(HttpServletRequest request, HttpServletResponse response), both - doGet and doPost