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JSON_09_JSON ArrayList 본문
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=== 기본 환경 ===
1. Spring Legacy Project 생성
- Project Name : jsonProject
- Template : Spring MVC Project
- Pacakge : com.basic.json
2. Java 버전 변경
- 프로젝트 우클릭 > properties > Proejct Facets
3. pom.xml 기본 설정 변경 & json-simple 라이브러리 추가
<!-- json-simple : JSON 작업을 위해 필요한 라이브러리 시작 -->
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1.1</version>
</dependency>
<!-- json-simple : JSON 작업을 위해 필요한 라이브러리 끝 -->|
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<?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"
<modelVersion>4.0.0</modelVersion>
<groupId>com.basic</groupId>
<artifactId>json</artifactId>
<name>jsonProject</name>
<packaging>war</packaging>
<version>1.0.0-BUILD-SNAPSHOT</version>
<properties>
<java-version>11</java-version>
<org.springframework-version>5.3.27</org.springframework-version>
<org.aspectj-version>1.9.19</org.aspectj-version>
<org.slf4j-version>2.0.7</org.slf4j-version>
</properties>
<dependencies>
<!-- json-simple : JSON 작업을 위해 필요한 라이브러리 시작 -->
<dependency>
<groupId>com.googlecode.json-simple</groupId>
<artifactId>json-simple</artifactId>
<version>1.1.1</version>
</dependency>
<!-- json-simple : JSON 작업을 위해 필요한 라이브러리 끝 -->
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
<exclusions>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<!-- AspectJ -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${org.aspectj-version}</version>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j-version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<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>
<scope>runtime</scope>
</dependency>
<!-- @Inject -->
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<!-- Servlet -->
<!-- Servlet : 기본값
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
-->
<!-- javax.servlet-api : servlet-api 대신 사용 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0</version>
<scope>provided</scope>
</dependency>
<!-- javax.servlet.jsp-api : jsp-api 대신 사용 -->
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.3</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- Test -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13.2</version>
<scope>test</scope>
</dependency>
<!-- project 기본 설정 끝 -->
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<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>
<!-- maven-compiler-plugin : 버전 변경 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.10.1</version>
<configuration>
<source>11</source>
<target>11</target>
<compilerArgument>-Xlint:all</compilerArgument>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<!-- exec-maven-plugin : 버전 변경 -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>3.1.0</version>
<configuration>
<mainClass>org.test.int1.Main</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>
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=====
3. 클래스 생성
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package com.basic.json;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
public class JsonList {
public static void main(String[] args) {
JSONObject obj = new JSONObject();
// 배열 선언
JSONArray jsonArray = new JSONArray();
// name을 하나씩 출력하기 위함
String name="";
// jsonArray에서 json 값을 하나씩 가져오기 위해
JSONObject jsonObj = new JSONObject();
obj.put("data 1", "data 1_value 1");
obj.put("data 2", "data 2_value 2");
System.out.println("First : " + obj);
// value 값 출력
System.out.println("data 1 : " + obj.get("data 1"));
// obj 값 배열에 추가
jsonArray.add(obj);
// 초기화
obj = new JSONObject();
obj.put("data 1", "data 1_value 3");
obj.put("data 2", "data 2_value 4");
System.out.println("Second : " + obj);
// value 값 출력
System.out.println("data 1 : " + obj.get("data 1"));
// obj 값 배열에 추가
jsonArray.add(obj);
System.out.println("JsonArray : " + jsonArray);
if(jsonArray.size()>0) {
for(int i=0; i<jsonArray.size(); i++) {
jsonObj = (JSONObject) jsonArray.get(i);
System.out.println((i+1) + "'st data 1 : " + jsonObj.get("data 1"));
}
}
}
}
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cs |
4. 실행하기
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