Simple Restful CURD operations(Student) Without DataBase
pom.xml :-
<?xml version="1.0" encoding="UTF-8"?>
<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>com.wfd</groupId>
<artifactId>springDemo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>springDemo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-hateoas</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>2.5.0</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>2.5.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
app.java :-
------------
package com.wfd.springDemo;
import static com.google.common.collect.Lists.newArrayList;
import static springfox.documentation.schema.AlternateTypeRules.newRule;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.context.request.async.DeferredResult;
import com.fasterxml.classmate.TypeResolver;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.builders.ResponseMessageBuilder;
import springfox.documentation.schema.ModelRef;
import springfox.documentation.schema.WildcardType;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;
@EnableSwagger2
@SpringBootApplication
public class SpringDemoApplication {
public static void main(String[] args) {
System.out.println("main");
SpringApplication.run(SpringDemoApplication.class, args);
}
@Autowired
private TypeResolver typeResolver;
@Bean
public Docket pcfgradleApi() {
return new Docket(DocumentationType.SWAGGER_2).select().apis(RequestHandlerSelectors.any())
.paths(PathSelectors.any()).build().pathMapping("/").genericModelSubstitutes(ResponseEntity.class)
.alternateTypeRules(newRule(
typeResolver.resolve(DeferredResult.class,
typeResolver.resolve(ResponseEntity.class, WildcardType.class)),
typeResolver.resolve(WildcardType.class)))
.useDefaultResponseMessages(false)
.globalResponseMessage(RequestMethod.GET, newArrayList(new ResponseMessageBuilder().code(500)
.message("500 message").responseModel(new ModelRef("Error")).build()));
}
}
Model :-
public class Student {
public String name;
public int id;
}
Controller:-
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;
import com.wfd.demo.entity.Student;
import com.wfd.demo.service.StudentService;
/**
* this class is used to take Student Rest calls.
*
* @author BayaReddy
*
*/
@RequestMapping("/student")
@RestController
public class StudentController {
@Autowired
StudentService studentService;
@RequestMapping(method = RequestMethod.POST)
public Student createStudent(@RequestBody Student pStudent) {
return studentService.createStudent(pStudent);
}
@RequestMapping(value = "/{studentId}", method = RequestMethod.GET)
public Student getStudent(@PathVariable Integer studentId) {
return studentService.getStudent(studentId);
}
@RequestMapping(method = RequestMethod.PUT)
public Student updateStudent(@RequestBody Student pStudent) {
return studentService.updateStudent(pStudent);
}
@RequestMapping(value = "/{studentId}", method = RequestMethod.DELETE)
public String deleteStudent(@PathVariable Integer studentId) {
return studentService.deleetStudent(studentId);
}
}
Service :
import com.wfd.demo.entity.Student;
public interface StudentService {
Student createStudent(Student pStudent);
Student getStudent(Integer studentId);
Student updateStudent(Student pStudent);
String deleetStudent(Integer studentId);
}
------------------------------------------------------
import java.util.HashMap;
import java.util.Map;
import org.springframework.stereotype.Service;
import com.wfd.demo.entity.Student;
/**
* @author BayaReddy
*
*/
@Service
public class StudentServiceImpl implements StudentService {
static Map<Integer, Student> map = new HashMap<>();
public Student createStudent(Student pStudent) {
map.put(pStudent.id, pStudent);
return pStudent;
}
public Student getStudent(Integer studentId) {
return map.get(studentId);
}
public Student updateStudent(Student pStudent) {
map.put(pStudent.id, pStudent);
return pStudent;
}
public String deleetStudent(Integer studentId) {
map.remove(studentId);
return studentId + " Deleted successfully";
}
}
Comments
Post a Comment