I have created a simple UserManagement restful web service. in which I have created 3 classes. The source codes are as following.
User class
package com.tutorialspoint; import java.io.Serializable; import javax.xml.bind.annotation.XmlElement; import javax.xml.bind.annotation.XmlRootElement; @XmlRootElement(name = "user") public class User implements Serializable{ private static final long serialVersionUID = 1L; private int id; private String name; private String profession; public User(){} public User(int id, String name, String profession){ this.id = id; this.name = name; this.profession = profession; } public int getId() { return id; } @XmlElement public void setId(int id) { this.id = id; } public String getName() { return name; } @XmlElement public void setName(String name) { this.name = name; } public String getProfession() { return profession; } @XmlElement public void setProfession(String profession) { this.profession = profession; } } UserDao class
package com.tutorialspoint; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.util.ArrayList; import java.util.List; public class UserDao { public List<User> getAllUsers(){ List<User> userList = null; try { File file = new File("Users.dat"); if (!file.exists()) { User user = new User(1, "Mahesh", "Teacher"); userList = new ArrayList<User>(); userList.add(user); saveUserList(userList); } else{ FileInputStream fis = new FileInputStream(file); ObjectInputStream ois = new ObjectInputStream(fis); userList = (List<User>) ois.readObject(); ois.close(); } } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } return userList; } private void saveUserList(List<User> userList){ try { File file = new File("Users.dat"); FileOutputStream fos; fos = new FileOutputStream(file); ObjectOutputStream oos = new ObjectOutputStream(fos); oos.writeObject(userList); oos.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } } UserService class
package com.tutorialspoint; import java.util.List; import javax.ws.rs.GET; import javax.ws.rs.Path; import javax.ws.rs.Produces; import javax.ws.rs.core.MediaType; @Path("/UserService") public class UserService { UserDao userDao = new UserDao(); @GET @Path("/users") @Produces(MediaType.APPLICATION_XML) public List<User> getUsers(){ return userDao.getAllUsers(); } } web.xml
<?xml version = "1.0" encoding = "UTF-8"?> <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_3_0.xsd" id = "WebApp_ID" version = "3.0"> <display-name>User Management</display-name> <servlet> <servlet-name>Jersey RESTful Application</servlet-name> <servlet-class>org.glassfish.jersey.servlet.ServletContainer </servlet-class> <init-param> <param-name>jersey.config.server.provider.packages</param-name> <param-value>com.tutorialspoint</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>Jersey RESTful Application</servlet-name> <url-pattern>/rest/*</url-pattern> </servlet-mapping> </web-app> Then I have created its war and deployed in Tomcat and start the Tomcat But when I am accessing this restfull web service by hitting the url http://localhost:8080/UserManagement/rest/UserService/users
using Postman it gives 404 error.
Please some one help me out on this.
