Spring Boot || Tutorial 4 || How to handle POST method using Spring Boot, Update in List

Today we will see how to handle POST method in Spring Boot. Basically in continuation to the last tutorial - we'll add update operation to the employee list. Let's follow the bellow steps-

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Step-1: Update Controller class with POST request tagged method - addEmployee(). Use the below code for reference

package com.ncteam.thirdtutorial;

import java.util.Arrays;
import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
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.RestController;

@RestController

public class ReturnObjectFromController {

@Autowired
private ReturnObjectService service ;

@RequestMapping("/listofpojo")
public List<ListPojo> listAllEmployee() {

return  service.getEmployeeList();
}
@RequestMapping("/listofpojo/{id}")
public ListPojo listEmployee(@PathVariable String id) {

return service.getEmployee(id);
}

@RequestMapping(method=RequestMethod.POST, value="/addempl")
public void addEmployee(@RequestBody ListPojo listpojo ) {
service.addEmployee(listpojo);
}
}

Step-2: Update the Service layer class with addEmployee() method extension. Use the below code for reference -

package com.ncteam.thirdtutorial;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import org.springframework.stereotype.Service;

@Service

public class ReturnObjectService {

public List<ListPojo> listEmployee = new ArrayList<>(Arrays.asList( new ListPojo("Emp1","Kennith", "NJ"),

new ListPojo("Emp2","Jorge", "NC"),

new ListPojo("Emp1","Melanie", "India")));

public List<ListPojo> getEmployeeList(){

return listEmployee;

}

public ListPojo getEmployee(String emplId) {

return listEmployee.stream().filter(t->t.getEmplId().equals(emplId)).findFirst().get();

}

public void addEmployee(ListPojo listpojo) {

// TODO Auto-generated method stub

listEmployee.add(listpojo);

}

}

Step 3: We are all good lets build the project and test the POST request on Postmaster application (chrome plugin)

Add the EE information as shown in the below image - select Body then raw check box and paste the EE info -

Also don't forget to update Header type to define the input type as JSON 

Click on the Send button - Status 200 OK

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