Spring ile Restful WebServis kullanımı

By Mehmet Kılıç Last updated Jul 28, 2018

Merhaba arkadaşlar ,

Spring ile rest servisler nasıl kullanılıyor ona değineceğiz. Projemizi Maven ile açıyoruz ve gerekli kütüphaneleri pom.xml dosyamıza ekliyoruz.

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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>io.bilisim</groupId>
    <artifactId>SpringRestFul</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>SpringRestFul Json Webapp</name>
    <url>http://maven.apache.org</url>
 
    <properties>
        <spring.version>3.2.2.RELEASE</spring.version>
        <jackson.version>1.9.10</jackson.version>
        <jdk.version>1.6</jdk.version>
    </properties>
 
    <dependencies>
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
 
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
 
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
 
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>1.7.1</version>
        </dependency>
 
    </dependencies>
 
    <build>
        <finalName>SpringRestFul</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-eclipse-plugin</artifactId>
                <version>2.9</version>
                <configuration>
                    <downloadSources>true</downloadSources>
                    <downloadJavadocs>false</downloadJavadocs>
                    <wtpversion>2.0</wtpversion>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>${jdk.version}</source>
                    <target>${jdk.version}</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
 
</project>

<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/maven-v4_0_0.xsd">

<groupId>io.bilisim</groupId>

<artifactId>SpringRestFul</artifactId>

<version>1.0-SNAPSHOT</version>

<name>SpringRestFul Json Webapp</name>

<url>http://maven.apache.org</url>

<spring.version>3.2.2.RELEASE</spring.version>

<jackson.version>1.9.10</jackson.version>

<jdk.version>1.6</jdk.version>

</properties>

<groupId>javax</groupId>

<artifactId>javaee-web-api</artifactId>

<scope>provided</scope>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-core</artifactId>

<version>${spring.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-web</artifactId>

<version>${spring.version}</version>

</dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-webmvc</artifactId>

<version>${spring.version}</version>

</dependency>

<groupId>com.google.code.gson</groupId>

</dependency>

</dependencies>

<build>

<finalName>SpringRestFul</finalName>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-eclipse-plugin</artifactId>

<downloadJavadocs>false</downloadJavadocs>

</configuration>

</plugin>

<groupId>org.apache.maven.plugins</groupId>

<artifactId>maven-compiler-plugin</artifactId>

<source>${jdk.version}</source>

<target>${jdk.version}</target>

</configuration>

</plugin>

</plugins>

</build>

</project>

Varsayalım ki Company isiminde bir modelimiz olsun .

Company.java



package io.bilisim.model;
 
public class Company {
 
    String name;
     
    String departments[];
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String[] getDepartments() {
        return departments;
    }
    public void setDepartments(String[] departments) {
        this.departments = departments;
    }
    public Company() {
    } 
     
}

package io.bilisim.model;

public class Company {

String name;

String departments[];

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String[] getDepartments() {

return departments;

}

public void setDepartments(String[] departments) {

this.departments = departments;

}

public Company() {

}

Rest Servis methodlarını controller sınıfımıza yazalım ve notasyonlar ile servisimizi oluşturalım.

CompanyController.java



package io.bilisim.controller;
 
import javax.ws.rs.Produces;
 
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import com.turkishh.model.Company;
import com.turkishh.utils.MyUtil;
 
@Controller
//Uygulama dizininden sonra servis path'imizi yazıyoruz.
@RequestMapping("/service")
public class CompanyController {
        //Servis path'imizden sonra hangi servis methoduna gidiceğini belirliyoruz.
        //ve {name} oalrak verdiğimiz referans ise request'te geleceğimiz parametredir
    @RequestMapping(value = "/company/{name}", method = RequestMethod.GET)
    @Produces("application/json")
    public @ResponseBody String getCompany(@PathVariable String name) {
 
        Company copmany = new Company();
        copmany.setName(name);
        copmany.setDepartments(new String[] { "Software", "Accounting",
                "Security", "Hardware" });
                       //Nesneyi json'a çevirip dönüyoruz.
        return MyUtil.objectToJson(copmany);
 
    }
 
}

package io.bilisim.controller;

import javax.ws.rs.Produces;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

import com.turkishh.model.Company;

import com.turkishh.utils.MyUtil;

@Controller

//Uygulama dizininden sonra servis path'imizi yazıyoruz.

@RequestMapping("/service")

public class CompanyController {

//Servis path'imizden sonra hangi servis methoduna gidiceğini belirliyoruz.

//ve {name} oalrak verdiğimiz referans ise request'te geleceğimiz parametredir

@RequestMapping(value = "/company/{name}", method = RequestMethod.GET)

@Produces("application/json")

public @ResponseBody String getCompany(@PathVariable String name) {

Company copmany = new Company();

copmany.setName(name);

copmany.setDepartments(new String[] { "Software", "Accounting",

"Security", "Hardware" });

//Nesneyi json'a çevirip dönüyoruz.

return MyUtil.objectToJson(copmany);

}

Objemizi jsona parse eden methodumuzu yazıyoruz.

MyUtil.java



package io.bilisim.utils;
 
import com.google.gson.Gson;
 
public class MyUtil {
    static Gson gson;
 
    public static String objectToJson(Object src) {
                //parse eden kütüphane
        gson = new Gson();
        return gson.toJson(src);
 
    }
 
}

package io.bilisim.utils;

import com.google.gson.Gson;

public class MyUtil {

static Gson gson;

public static String objectToJson(Object src) {

//parse eden kütüphane

gson = new Gson();

return gson.toJson(src);

}

Şimdi ise spring konfigurasyonlarını yapıyoruz.

applicationContext.xml



<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans     
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
 
    <context:component-scan base-package="io.bilisim.controller" />
 
    <mvc:annotation-driven />
 
</beans>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:context="http://www.springframework.org/schema/context"

xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-3.0.xsd

http://www.springframework.org/schema/mvc

http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

<context:component-scan base-package="io.bilisim.controller" />

<mvc:annotation-driven />

</beans>

Son olarak web.xml dosyamızdaki ayarlamalarımızı yaparak teste başlıyoruz.

web.xml



<web-app id="WebApp_ID" version="2.4"
    xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 
    <display-name>Spring Web RestFul Services Application</display-name>
 
    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
 
       //RestFul servis path'i nerden başlıyacağına karar verebiliryoruz
    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
         //Spring konfigurasyonları
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
         
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
 
</web-app>

<web-app id="WebApp_ID" version="2.4"

xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

<display-name>Spring Web RestFul Services Application</display-name>

<servlet-name>mvc-dispatcher</servlet-name>

<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<load-on-startup>1</load-on-startup>

</servlet>

//RestFul servis path'i nerden başlıyacağına karar verebiliryoruz

<servlet-mapping>

<servlet-name>mvc-dispatcher</servlet-name>

<url-pattern>/*</url-pattern>

</servlet-mapping>

//Spring konfigurasyonları

<context-param>

<param-name>contextConfigLocation</param-name>

<param-value>/WEB-INF/applicationContext.xml</param-value>

</context-param>

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

</listener>

</web-app>

Uygulamamızı sunucumuza deploy ettikten sonra şu dizinde yer almış olacaktır.

http://localhost:8080/SpringRestFul/service/company/{set_edilecek_parametre}

Request attığımızda çıktısı aşşağıdaki gibi olmalıdır.

Umarım yararlı olmuştur .

İyi Çalışmalar.