Nishil Nishil - 1 month ago 7
reST (reStructuredText) Question

404 Error in Postman - Spring Rest

I am getting a 404 error when I test my REST Spring WebService in Postman.

Can anyone suggest a solution??

My code :

src/main/resources/spring/application-config.xml
-------------------------------------------------------------------------------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<!-- Uncomment and add your base-package here:
<context:component-scan
base-package="org.springframework.samples.service"/> -->

</beans>

-------------------------------------------------------------------------------------------------------------------------------------------

src/main/resources/logback.xml

-------------------------------------------------------------------------------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<!-- configuration file for LogBack (slf4J implementation)
See here for more details: http://gordondickens.com/wordpress/2013/03/27/sawing-through-the-java-loggers/ -->
<configuration scan="true" scanPeriod="30 seconds">

<contextListener class="ch.qos.logback.classic.jul.LevelChangePropagator">
<resetJUL>true</resetJUL>
</contextListener>

<!-- To enable JMX Management -->
<jmxConfigurator/>

<appender name="console" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%-5level %logger{0} - %msg%n</pattern>
</encoder>
</appender>

<!--<logger name="org.hibernate" level="debug"/> -->
<!-- Uncomment and add your logger here:
<logger name="org.springframework.samples.service.service" level="debug"/> -->

<root level="info">
<appender-ref ref="console"/>
</root>
</configuration>

---------------------------------------------------------------------------------------------------------------------------------------------
src/main/webapp/WEB-INF/mvc-config.xml
---------------------------------------------------------------------------------------------------------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

<!-- Uncomment and your base-package here:
<context:component-scan
base-package="org.springframework.samples.web"/> -->


<mvc:annotation-driven />

<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- Example: a logical view name of 'showMessage' is mapped to '/WEB-INF/jsp/showMessage.jsp' -->
<property name="prefix" value="/WEB-INF/view/"/>
<property name="suffix" value=".jsp"/>
</bean>

</beans>
---------------------------------------------------------------------------------------------------------------------------------------------
src/main/webapp/WEB-INF/web.xml
---------------------------------------------------------------------------------------------------------------------------------------------
<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">

<display-name>ManageUserRoles</display-name>

<!--
- Location of the XML file that defines the root application context.
- Applied by ContextLoaderListener.
-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/application-config.xml</param-value>
</context-param>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>


<!--
- Servlet that dispatches request to registered handlers (Controller implementations).
-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/mvc-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

</web-app>


//////////////////////////Controller///////////////////////////////

package com.controller;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import com.model.Role;

@Controller
public class RoleController {

private static final Logger logger = LoggerFactory.getLogger(RoleController.class);

Map<String, Role> roleData = new HashMap<String, Role>();

@RequestMapping(value = "/role/{role_name}", method = RequestMethod.GET,headers="Accept=application/json")
public @ResponseBody Role findRole(@PathVariable("role_name") String role_name)
{
logger.info("Get a single role with name="+role_name);
return roleData.get(role_name);
}

@RequestMapping(value = "/roles", method = RequestMethod.GET)
public @ResponseBody List<Role> getAllRoles()
{
logger.info("Start getAllRoles.");
List<Role> list_roles = new ArrayList<Role>();
list_roles = createRoleList();
return list_roles;

}

public List<Role> createRoleList()
{
Role role1 = new Role("NP Sherm Test", "NP Test", "Active");
Role role2 = new Role("Sherm Employee Test", "Employee access test role", "Active");
Role role3 = new Role("Sherm Manager Test", "Manager test user role", "Active");

List<Role> list_roles = new ArrayList<Role>();
list_roles.add(role1);
list_roles.add(role2);
list_roles.add(role3);

return list_roles;

}
@RequestMapping(value="/roles/new/",method=RequestMethod.POST,headers="Accept=application/json")
public @ResponseBody Role addRole(@RequestBody Role role)
{
logger.info("Start Add Role");
Role roleGet = roleData.put(role.getRole_name(), role);
return roleGet;
}
@RequestMapping(value="/roles/new/",method=RequestMethod.PUT,headers="Accept=application/json")
public @ResponseBody Role editRole(@RequestBody Role role)
{
Role role_update = new Role();
role.setRole_name(role.getRole_name());
role.setRole_desc(role.getRole_desc());
role.setRole_status(role.getRole_status());
return role_update;
}

}


/////////////////////////////////////Model///////////////////////////////

package com.model;

public class Role {

private String role_name;
private String role_desc;
private String role_status;

public Role(){}



public Role(String role_name, String role_desc, String role_status) {
super();
this.role_name = role_name;
this.role_desc = role_desc;
this.role_status = role_status;
}



public String getRole_name() {
return role_name;
}
public void setRole_name(String role_name) {
this.role_name = role_name;
}
public String getRole_desc() {
return role_desc;
}
public void setRole_desc(String role_desc) {
this.role_desc = role_desc;
}
public String getRole_status() {
return role_status;
}
public void setRole_status(String role_status) {
this.role_status = role_status;
}


}


//////////////////////////////pom.xml//////////////////////////////////

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework.samples.service.service</groupId>
<artifactId>ManageUserRoles</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<properties>

<!-- Generic properties -->
<java.version>1.6</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>

<!-- Web -->
<jsp.version>2.2</jsp.version>
<jstl.version>1.2</jstl.version>
<servlet.version>2.5</servlet.version>


<!-- Spring -->
<spring-framework.version>3.2.3.RELEASE</spring-framework.version>

<!-- Hibernate / JPA -->
<hibernate.version>4.2.1.Final</hibernate.version>

<!-- Logging -->
<logback.version>1.0.13</logback.version>
<slf4j.version>1.7.5</slf4j.version>

<!-- Test -->
<junit.version>4.11</junit.version>

</properties>

<dependencies>

<!-- Spring MVC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring-framework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring-framework.version}</version>
</dependency>

<!-- Other Web dependencies -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>${jsp.version}</version>
<scope>provided</scope>
</dependency>

<!-- Spring and Transactions -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring-framework.version}</version>
</dependency>

<!-- Logging with SLF4J & LogBack -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
<scope>runtime</scope>
</dependency>

<!-- Hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${hibernate.version}</version>
</dependency>


<!-- Test Artifacts -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring-framework.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>

</dependencies>
</project>

Answer

As you don't have any specific application context, the problem is with the current URL mapping i.e., the URI ManageUserRoles did NOT map to the controller, soc hange the code as below:

@Controller("ManageUserRoles")
public class RoleController {

// Add all you existing handler methods

}

After your UPDATE 1:

Also, your componentscan is not correct in mvc-config.xml because of which controller can't be detected:

base-package="org.springframework.samples.web" change it to base-package="com.controller"