#29.스프링프레임워크 & 마이바티스 (Spring Framework, MyBatis)_스프링프레임워크 강좌, 재직자환급교육,실업자국비지원교육, 국비지원교육, 구로IT교육학원, IT실무교육, 오라클자바커뮤니티
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1) The document describes a Spring Boot RESTful web service example that retrieves data from an Oracle table and returns it as a JSON response. It also returns a single record as an object mapped to JSON based on searching by name. 2) Jackson library and @RestController annotation are used to return the response as JSON instead of using JSP. 3) The name parameter is passed in the URL path instead of as a parameter, and is used to query the database and return the matching data as a JSON response.
#29.스프링프레임워크 & 마이바티스 (Spring Framework, MyBatis)_스프링프레임워크 강좌, 재직자환급교육,실업자국비지원교육, 국비지원교육, 구로IT교육학원, IT실무교육, 오라클자바커뮤니티
- 1. 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
- 2. 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.
- 3. 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> <!-- Spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${org.springframework-version}</version> <exclusions> <!-- Exclude Commons Logging in favor of SLF4j --> <exclusion> <groupId>commons-logging</groupId>
- 5. <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${org.springframework-version}</version> </dependency> <!-- ORACLE --> <dependency> <groupId>com.oracle</groupId> <artifactId>ojdbc6</artifactId> <version>11.1.0.7.0</version> </dependency> <!-- Jackson --> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.4.2</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.4.2</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.4.2</version> </dependency> <!-- AspectJ --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>${org.aspectj-version}</version> </dependency>
- 7. </exclusions> <scope>runtime</scope> </dependency> <!-- @Inject --> <dependency> <groupId>javax.inject</groupId> <artifactId>javax.inject</artifactId> <version>1</version> </dependency> <!-- Servlet --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> </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> <version>1.2</version> </dependency> <!-- DBCP --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.2.2</version> </dependency> <!-- Test --> <dependency>
- 9. <showWarnings>true</showWarnings> <showDeprecation>true</showDeprecation> </configuration> </plugin> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>exec-maven-plugin</artifactId> <version>1.2.1</version> <configuration> <mainClass>org.test.int1.Main</mainClass> </configuration> </plugin> </plugins> </build> </project> 4. /WEB-INF/web.xml <?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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> <!-- Processes application requests --> <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 <?xml version="1.0" encoding="UTF-8"?>
- 10. <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" 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;
- 11. @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 {
- 12. 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) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } 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 java.util.List; import model.Onj;
- 13. 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); } } catch (SQLException e) { e.printStackTrace(); } 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();
- 14. if (rs.next()) { onj.setName(rs.getString("name")); onj.setUrl(rs.getString("url")); } } catch (SQLException e) { e.printStackTrace(); } 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; }
- 15. } 11. service쪽의 OnjService.java package service; import java.util.HashMap; import java.util.List; 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
- 16. <br><br><br>