#29.스프링프레임워크 & 마이바티스 (spring framework,...

스프링프레임워크 & 마이바티스

(Spring Framework, MyBatis)

6-16. Spring4 WEB MVC RESTFul Web Service(JSON 응답생성하기)

오라클 테이블에서 데이터를 읽어 JSON 응답으로 만드는 기능과, NAME으로 검색하여 한 건

의 레코드를 객체로 만들어 JSON 응답으로 보내는 기능의 예제인데, 응답을 기존에 많이 사

용하는 JSP가 아닌 JSON으로 보내기 위해 jackson library 및 @RestController를 사용했다.

RestFul WebService를 구현하기 위해 파라미터가 아닌 URL경로로 NAME을 넘겨주면 이를 파

라미터로 받아서 DB 쿼리에서 인자로 이용해 해당 NAME의 데이터를 검색 후 JSON 응답으

로 만들어 클라이언트로 보냈다.@RequestHeader Annotation은 HTTP 요청 헤더 값을 컨트롤

러 메서드의 파라미터로 전달한다(메서드 파라미터가 String가 아니라면 타입변환을 자동으로

적용한다).

@ResponseBody 어노테이션은 메소드에서 리턴되는 값은 View 를 통해서 출력되지 않고

HTTP Response Body 에 직접 쓰여지게 되고, 이때 쓰여지기 전에 리턴 되는 데이터 타입에

따라 MessageConverter 에서 변환이 이뤄짂 후 쓰여지게 된다.

@RestController 어노테이션은@Controller를 상속받아 @Controller + @ResponseBody와 같

은 의미로써 Restful웹서비스를 구현할 때 응답은 항상 응답바디(response body)에 보내져야

하는데 이를위해 스프링4.0에서 특별히 @RestController를 제공한다. 도메인객체를 Web

Service로 노출 가능하며 각각의 @RequestMapping method에 @ResponseBody할 필요가 없

어짂다. 그러므로 Spring Web MVC에서 JSON or XML 포맷으로 데이터를 넘길 수 있다.

0. 전체 프로젝트 구성화면

1. 오라클 scott/tiger 계정에 실습을 위한 테이블 생성

SQL> create table onj (

2 name varchar2(50),

3 url varchar2(50));

테이블이 생성되었습니다.

SQL> insert into onj values ('community','ojc.asia');

1 개의 행이 만들어졌습니다.

SQL> insert into onj values ('edu','ojcedu.com');

1 개의 행이 만들어졌습니다.

SQL> commit;

커밋이 완료되었습니다.

2. STS에서

File New Spring Legacy Project

Project Name : spring4rest2

Spring MVC Project 선택

다음 화면의 top level package에서 a.b.spring4rest2 입력

3. 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/maven-v4_0_0.xsd">

<modelVersion>4.0.0</modelVersion>

<groupId>onj.spring</groupId>

<artifactId>rest</artifactId>

<name>spring4rest2</name>

<packaging>war</packaging>

<version>1.0.0-BUILD-SNAPSHOT</version>

<properties>

<java-version>1.6</java-version>

<org.springframework-version>4.2.4.RELEASE</org.springframework-version>

<org.aspectj-version>1.6.10</org.aspectj-version>

<org.slf4j-version>1.6.6</org.slf4j-version>

</properties>

<dependencies>



<dependency>

<groupId>org.springframework</groupId>

<artifactId>spring-context</artifactId>

<version>${org.springframework-version}</version>

<exclusions>



<exclusion>

<groupId>commons-logging</groupId>

<artifactId>commons-logging</artifactId>

</exclusion>

</exclusions>

</dependency>

<dependency>


<artifactId>spring-webmvc</artifactId>

<version>4.0.7.RELEASE</version>

</dependency>

<dependency>


<artifactId>spring-web</artifactId>


</dependency>

<dependency>


<artifactId>spring-context</artifactId>

<version>4.0.7.RELEASE</version>

</dependency>

<dependency>


<artifactId>spring-__EXPRESSION__</artifactId>


</dependency>

<dependency>


<artifactId>spring-core</artifactId>


</dependency>

<dependency>


<artifactId>spring-aop</artifactId>


</dependency>

<dependency>


<artifactId>spring-aspects</artifactId>


</dependency>

<dependency>


<artifactId>spring-jdbc</artifactId>


</dependency>



<dependency>

<groupId>com.oracle</groupId>

<artifactId>ojdbc6</artifactId>

<version>11.1.0.7.0</version>

</dependency>



<dependency>

<groupId>com.fasterxml.jackson.core</groupId>

<artifactId>jackson-annotations</artifactId>

<version>2.4.2</version>

</dependency>

<dependency>


<artifactId>jackson-core</artifactId>


</dependency>

<dependency>


<artifactId>jackson-databind</artifactId>


</dependency>



<dependency>

<groupId>org.aspectj</groupId>

<artifactId>aspectjrt</artifactId>

<version>${org.aspectj-version}</version>

</dependency>

<dependency>

<groupId>org.slf4j</groupId>

<artifactId>slf4j-api</artifactId>

<version>${org.slf4j-version}</version>

</dependency>

<dependency>


<artifactId>jcl-over-slf4j</artifactId>


<scope>runtime</scope>

</dependency>

<dependency>


<artifactId>slf4j-log4j12</artifactId>



</dependency>

<dependency>

<groupId>log4j</groupId>

<artifactId>log4j</artifactId>


<exclusions>

<exclusion>

<groupId>javax.mail</groupId>

<artifactId>mail</artifactId>

</exclusion>

<exclusion>

<groupId>javax.jms</groupId>

<artifactId>jms</artifactId>

</exclusion>

<exclusion>

<groupId>com.sun.jdmk</groupId>

<artifactId>jmxtools</artifactId>

</exclusion>

<exclusion>

<groupId>com.sun.jmx</groupId>

<artifactId>jmxri</artifactId>

</exclusion>

</exclusions>


</dependency>



<dependency>

<groupId>javax.inject</groupId>

<artifactId>javax.inject</artifactId>

<version>1</version>

</dependency>



<dependency>

<groupId>javax.servlet</groupId>

<artifactId>javax.servlet-api</artifactId>


</dependency>

<dependency>

<groupId>javax.servlet.jsp</groupId>

<artifactId>jsp-api</artifactId>

<version>2.1</version>

<scope>provided</scope>

</dependency>

<dependency>

<groupId>javax.servlet</groupId>

<artifactId>jstl</artifactId>


</dependency>



<dependency>

<groupId>commons-dbcp</groupId>

<artifactId>commons-dbcp</artifactId>


</dependency>



<dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>


<scope>test</scope>

</dependency>

</dependencies>

<repositories>

<repository>

<id>oracle</id>

<name>ORACLE JDBCRepository</name>

<url>http://maven.jahia.org/maven2</url>

</repository>

</repositories>

<build>

<plugins>

<plugin>

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


<configuration>

<additionalProjectnatures>

<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>

</additionalProjectnatures>

<additionalBuildcommands>

<buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>

</additionalBuildcommands>

<downloadSources>true</downloadSources>

<downloadJavadocs>true</downloadJavadocs>

</configuration>

</plugin>

<plugin>

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

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


<configuration>

<source>1.6</source>

<target>1.6</target>

<compilerArgument>-Xlint:all</compilerArgument>

<showWarnings>true</showWarnings>

<showDeprecation>true</showDeprecation>

</configuration>

</plugin>

<plugin>

<groupId>org.codehaus.mojo</groupId>

<artifactId>exec-maven-plugin</artifactId>


<configuration>

<mainClass>org.test.int1.Main</mainClass>

</configuration>

</plugin>

</plugins>

</build>

</project>

4. /WEB-INF/web.xml


<web-app version="2.5" 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">

<display-name>Spring MVC Rest(OracleJava Community)</display-name>



<servlet>

<servlet-name>rest</servlet-name>

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

</servlet>

<servlet-mapping>

<servlet-name>rest</servlet-name>

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

</servlet-mapping>

</web-app>

5. /WEB-INF/rest-servlet.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:p="http://www.springframework.org/schema/p"

xsi:schemaLocation="

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

http://www.springframework.org/schema/beans/spring-beans-4.0.xsd

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

http://www.springframework.org/schema/context/spring-context-4.0.xsd

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

http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

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

<context:component-scan base-package="service" />

<context:component-scan base-package="dao" />

<mvc:annotation-driven />

</beans>

6. src/main/resources/db.properties

driver=oracle.jdbc.driver.OracleDriver

url=jdbc:oracle:thin:@192.168.0.27:1521:onj

user=scott

password=tiger

7. OnjRestController.java

package controller;

import java.util.List;

import model.Onj;

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

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.RestController;

import service.OnjService;

@RestController

@RequestMapping("/service/onj/")

public class OnjRestController {

@Autowired

private OnjService onjService;

@RequestMapping(method=RequestMethod.GET, headers="Accept=application/json")

public List<Onj> getAllOnj() {

List<Onj> onjs = onjService.getAllOnj();

return onjs;

}

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

headers="Accept=application/json")

public Onj getOnj(@PathVariable String name) {

Onj onj = onjService.getOnjByName(name);

return onj;

}

}

8. DBUtil.java

package dao;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.InputStream;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

import java.util.Properties;

public class DBUtil {

private static Connection connection = null;

public static Connection getConnection() {

if (connection != null)

return connection;

else {

try {

Properties prop = new Properties();

InputStream inputStream = DBUtil.class.getClassLoader()

.getResourceAsStream("db.properties");

prop.load(inputStream);

String driver = prop.getProperty("driver");

String url = prop.getProperty("url");

String user = prop.getProperty("user");

String password = prop.getProperty("password");

Class.forName(driver);

connection = DriverManager.getConnection(url, user, password);

} catch (ClassNotFoundException e) {

e.printStackTrace();

} catch (SQLException e) {


} catch (FileNotFoundException e) {


} catch (IOException e) {


}

return connection;

}

}

}

9. OnjDAO.java

package dao;

import java.sql.Connection;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

import java.util.ArrayList;


import model.Onj;

import org.springframework.stereotype.Repository;

@Repository("onjDao")

public class OnjDAO {

private Connection connection;

public OnjDAO() {

connection = DBUtil.getConnection();

}

//onj 테이블의 모든 데이터를 LIST 구조에 담아 리턴

public List<Onj> getAllOnjs() {

List<Onj> users = new ArrayList<Onj>();

try {

Statement statement = connection.createStatement();

ResultSet rs = statement

.executeQuery("select name, url from onj");

while (rs.next()) {

Onj onj = new Onj();

onj.setName(rs.getString("name"));

onj.setUrl(rs.getString("url"));

users.add(onj);

}



}

return users;

}

//이름을 통래 데이터 한건 SELECT 후 Onj 객체에 담아 리턴

public Onj getOnjByName(String name) {

Onj onj = new Onj();

try {

PreparedStatement preparedStatement = connection

.prepareStatement("select name, url from onj where

name=?");

preparedStatement.setString(1, name);

ResultSet rs = preparedStatement.executeQuery();

if (rs.next()) {

onj.setName(rs.getString("name"));

onj.setUrl(rs.getString("url"));

}



}

return onj;

}

}

10. model쪽의 Onj.java

package model;

import org.springframework.stereotype.Component;

public class Onj {

String name;

String url;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getUrl() {

return url;

}

public void setUrl(String url) {

this.url = url;

}

@Override

public String toString() {

return "NAME:" + name + ",URL:" + url;

}

}

11. service쪽의 OnjService.java

package service;

import java.util.HashMap;


import java.util.Map;

import model.Onj;

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

import org.springframework.stereotype.Service;

import dao.OnjDAO;

@Service("onjService")

public class OnjService {

Map<String, Onj> onjs;

@Autowired

private OnjDAO onjDao;

public List<Onj> getAllOnj() {

return onjDao.getAllOnjs();

}

public Onj getOnjByName(String name) {

Onj onj = onjDao.getOnjByName(name);

return onj;

}

}

12. 실행화면

#29.스프링프레임워크 & 마이바티스 (spring framework,...

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