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회고록(TIL&WIL)

TIL 2023.02.23 Java Web 12 (Struts frame work example, (feat.MongoDB))

만들어나가자 2023. 2. 24. 09:02

apache Struts 프레임워크

예전에 쓰던 자동화를 아주 잘해둔 프레임워크 스프링을 해보기전 비교느낌으로 체험

자바 프로젝트로 만들기

다운로드


빌드 패스에 다운받은 라이브러리들 추가 


라이브러리 등록 


필터 방식으로 구현하고있음 web.xml에 필터 추가

 	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>

	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

src에 struts.xml 생성

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <constant name="struts.devMode" value="true" />

    <package name="basicstruts2" extends="struts-default">
        <action name="index" class="com.bit.controller.IndexAction">
            <result>/index.jsp</result>
        </action>
    </package>

</struts>

Action인터페이스를 상속받아 controller 생성, index.jsp 생성

package com.bit.controller;

import com.opensymphony.xwork2.Action;

public class IndexAction implements Action{

	@Override
	public String execute() throws Exception {
		System.out.println("스트럿츠 액션");
		return "success";
	}

}

index.action으로 접속 시 index.jsp 화면 출력됨 

maven 프로젝트로 만들기

 


만드는 순간 샘플로 코드들이 다 들어가 있어서 바로 실행 가능하다.

org.apache.maven -> webapp으로 프로젝트 만든 후 struts 라이브러리 추가하기

-------------------- pom.xml 의존성 추가
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>

  <!-- https://mvnrepository.com/artifact/org.apache.struts/struts2-core -->
<dependency>
    <groupId>org.apache.struts</groupId>
    <artifactId>struts2-core</artifactId>
    <version>2.5.22</version>
</dependency>
------------------- web.xml 필터 추가
<filter>
  <filter-name>struts</filter-name>
  <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
  <filter-name>struts</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

struts, mongoDB - CRUD 예제

pom.xml - dependency 추가, jetty 플러그인 추가

    <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
    <scope>provided</scope>
</dependency>
    <!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>
    <!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
    <groupId>log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>1.2.17</version>
</dependency>
    <!-- https://mvnrepository.com/artifact/javax.servlet.jsp/jsp-api -->
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.2</version>
    <scope>provided</scope>
</dependency>
    <!-- https://mvnrepository.com/artifact/org.mongodb/mongo-java-driver -->
<dependency>
    <groupId>org.mongodb</groupId>
    <artifactId>mongo-java-driver</artifactId>
    <version>3.12.12</version>
</dependency>

...

<plugins>
        <plugin>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-maven-plugin</artifactId>
            <version>9.4.7.v20170914</version>
            <configuration>
                <webApp>
                    <contextPath>/${build.finalName}</contextPath>
                </webApp>
                <stopKey>CTRL+C</stopKey>
                <stopPort>8999</stopPort>
                <scanIntervalSeconds>10</scanIntervalSeconds>
                <scanTargets>
                    <scanTarget>src/main/webapp/WEB-INF/web.xml</scanTarget>
                </scanTargets>
            </configuration>
        </plugin>
    </plugins>

src/main/resources 에 log4j.properties파일과 struts.xml 파일 추가

-------------- log4j.properties
# Set root logger level to DEBUG and its only appender to A1.
log4j.rootLogger=DEBUG, A1

# A1 is set to be a ConsoleAppender.
log4j.appender.A1=org.apache.log4j.ConsoleAppender

# A1 uses PatternLayout.
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n

-------------- struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
    "http://struts.apache.org/dtds/struts-2.5.dtd">

<struts>
    <package name="default" namespace="/" extends="struts-default">
        <action name="index" class="com.bit.action.IndexAction">
            <result name="success">/index.jsp</result>
        </action>
        <action name="intro" class="com.bit.action.IndexAction">
            <result name="success">/intro.jsp</result>
        </action>
    </package>
    <package name="dept" namespace="/dept" extends="struts-default">
        <action name="list" class="com.bit.action.ListAction">
        	<interceptor-ref name="params"/>
            <result name="success">/dept/list.jsp</result>
        </action>
        <action name="add" class="com.bit.action.IndexAction">
            <result name="success">/dept/add.jsp</result>
        </action>
        <action name="insert" class="com.bit.action.AddAction">
        	<interceptor-ref name="params"/>
            <result name="input">/dept/add.jsp</result>
            <result name="success" type="redirectAction">list</result>
        </action>
        <action name="detail" class="com.bit.action.DeptAction">
        	<interceptor-ref name="params"/>
        	<result name="success">/dept/detail.jsp</result>
        </action>
        <action name="update" class="com.bit.action.UpdateAction">
        	<interceptor-ref name="params"/>
        	<result name="input" type="redirect">detail.action?id=${id}</result>
        	<result name="success" type="redirect">list.action</result>
        </action>
    </package>
</struts>

DeptVo 와 DeptDao 작성

------------------ DeptVo
package com.bit.model;

import org.bson.types.ObjectId;

public class DeptVo {
	private ObjectId id;
	private int deptno;
	private String dname, loc;
	public DeptVo() {
	}
	
	public DeptVo(int deptno, String dname, String loc) {
		super();
		this.deptno = deptno;
		this.dname = dname;
		this.loc = loc;
	}
	public DeptVo(ObjectId id, int deptno, String dname, String loc) {
		super();
		this.id = id;
		this.deptno = deptno;
		this.dname = dname;
		this.loc = loc;
	}
	public ObjectId getId() {
		return id;
	}
	public void setId(ObjectId id) {
		this.id = id;
	}
	public int getDeptno() {
		return deptno;
	}
	public void setDeptno(int deptno) {
		this.deptno = deptno;
	}
	public String getDname() {
		return dname;
	}
	public void setDname(String dname) {
		this.dname = dname;
	}
	public String getLoc() {
		return loc;
	}
	public void setLoc(String loc) {
		this.loc = loc;
	}
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + deptno;
		result = prime * result + ((dname == null) ? 0 : dname.hashCode());
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		result = prime * result + ((loc == null) ? 0 : loc.hashCode());
		return result;
	}
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		DeptVo other = (DeptVo) obj;
		if (deptno != other.deptno)
			return false;
		if (dname == null) {
			if (other.dname != null)
				return false;
		} else if (!dname.equals(other.dname))
			return false;
		if (id == null) {
			if (other.id != null)
				return false;
		} else if (!id.equals(other.id))
			return false;
		if (loc == null) {
			if (other.loc != null)
				return false;
		} else if (!loc.equals(other.loc))
			return false;
		return true;
	}
	@Override
	public String toString() {
		return "DeptVo [id=" + id + ", deptno=" + deptno + ", dname=" + dname + ", loc=" + loc + "]";
	}
}

------------------ DeptDao
package com.bit.model;

import ...

public class DeptDao {
	Logger log = Logger.getLogger("DeptDao");
	MongoClient client = new MongoClient(Arrays.asList(
			new ServerAddress("localhost", 27117),
			new ServerAddress("localhost", 27217),
			new ServerAddress("localhost", 27317)));
	final String DBNAME = "lecture";
	final String COLLNAME = "dept";
	public List<DeptVo> findAll(){
		List<DeptVo> list = new ArrayList<DeptVo>();
		try {
			MongoCollection<Document> coll = client.getDatabase(DBNAME).getCollection(COLLNAME);
			FindIterable<Document> ite = coll.find();
			MongoCursor<Document> cur = ite.cursor();
			while (cur.hasNext()) {
				org.bson.Document doc = cur.next();
				list.add(new DeptVo(doc.getObjectId("_id"), doc.getInteger("deptno"), doc.getString("dname"),
						doc.getString("loc")));
			} 
		} finally {
			if(client!=null)client.close();
		}
		log.debug(list.toString());
		return list;
	}
	
	public void addOne(int deptno, String dname, String loc) {
		try {
			MongoCollection<Document> coll = client.getDatabase(DBNAME).getCollection(COLLNAME);
			Document doc = new Document();
			doc.append("deptno", deptno);
			doc.append("dname", dname);
			doc.append("loc", loc);
			coll.insertOne(doc);
		} finally {
			if(client!=null)client.close();
		}
		
	}
	
	public DeptVo findOne(String id) {
		DeptVo bean = null;
		ObjectId _id = new ObjectId(id);
		try {
			MongoCollection<Document> coll = client.getDatabase(DBNAME).getCollection(COLLNAME);
			Bson filter = Filters.eq("_id", _id);
			FindIterable<Document> ite = coll.find(filter);
			Document doc = ite.first();
			bean = new DeptVo(
					doc.getObjectId("_id"),
					doc.getInteger("deptno"),
					doc.getString("dname"),
					doc.getString("loc"));
		} finally {
			if(client!=null)client.close();
		}
		return bean;
	}
	
	public Long updateOne(String id, int deptno, String dname, String loc) {
		ObjectId _id = new ObjectId(id);
		try {
			MongoCollection<Document> coll = client.getDatabase(DBNAME).getCollection(COLLNAME);
			Bson filter = Filters.eq("_id", _id);
			Bson update = Updates.combine(
					Updates.set("dname", dname),
					Updates.set("loc", loc));
			UpdateResult result = coll.updateOne(filter, update);
			return result.getModifiedCount();
		} finally {
			if(client!=null)client.close();
		}
	}
}

controller와 view

------------ IndexAction -> 화면 띄워주기 액션으로 사용
package com.bit.action;

import com.opensymphony.xwork2.Action;

public class IndexAction implements Action {

	@Override
	public String execute() throws Exception {
		return SUCCESS;
	}
}
-------------- AddAction - 입력받은 값을 받으려면 setter를 정의해주면 받아온다.(단 view에서 지정한 name과 같아야함)
package com.bit.action;

import com.bit.model.DeptDao;
import com.opensymphony.xwork2.Action;

public class AddAction implements Action {
	int deptno;
	String dname, loc;
	public void setDeptno(int deptno) {
		this.deptno = deptno;
	}
	public void setDname(String dname) {
		this.dname = dname;
	}
	public void setLoc(String loc) {
		this.loc = loc;
	}
	@Override
	public String execute() throws Exception {
		if(deptno==0) return INPUT;
		if(dname.isEmpty()) return INPUT;
		if(loc.isEmpty()) return INPUT;
		
		DeptDao dao = new DeptDao();
		dao.addOne(deptno, dname, loc);
		return SUCCESS;
	}
}
-------------- dept/add.jsp
<body>
	<form action="insert.action" method="post">
		<div>
			<label>deptno</label>
			<input name="deptno"/>
		</div>
		<div>
			<label>dname</label>
			<input name="dname"/>
		</div>
		<div>
			<label>loc</label>
			<input name="loc"/>
		</div>
		<div>
			<button>btn</button>
		</div>
	</form>
</body>
------------ ListAction -> 리스트를 뷰에 넘겨줘야하기 때문에 변수 선언 및 getter 정의
package com.bit.action;

import java.util.List;

import com.bit.model.DeptDao;
import com.bit.model.DeptVo;
import com.opensymphony.xwork2.Action;

public class ListAction implements Action {
	List<DeptVo> list;
	
	public List<DeptVo> getList() {
		return list;
	}
	@Override
	public String execute() throws Exception {
		DeptDao dao = new DeptDao();
		list = dao.findAll();
		return SUCCESS;
	}
}
------------ dept/list.jsp -> Action에서 정의한 변수들을 jstl을 이용해서 받을 수 있다. 반드시 이름이 같아야함
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
...

<body>
	<table>
		<thead>
		<tr>
			<th>deptno</th>
			<th>dname</th>
			<th>loc</th>
		</tr>
		</thead>
		<tbody>
		<c:forEach items="${list }" var="bean">
			<tr>
			<c:url value="detail.action" var="detail">
				<c:param name="id" value="${bean.id }"></c:param>
			</c:url>
				<td><a href="${detail}">${bean.deptno }</a></td>
				<td><a href="${detail}">${bean.dname }</a></td>
				<td><a href="${detail}">${bean.loc }</a></td>
			</tr>
		</c:forEach>
		</tbody>	
	</table>
</body>
...
-------------- DeptAction - id는 받으니 setter, bean은 돌려주니 getter
package com.bit.action;

import org.apache.log4j.Logger;

import com.bit.model.DeptDao;
import com.bit.model.DeptVo;
import com.opensymphony.xwork2.Action;

public class DeptAction implements Action {
	Logger log = Logger.getLogger(getClass().getCanonicalName());
	String id;
	private DeptVo bean;
	public DeptVo getBean() {
		return bean;
	}
	public void setId(String id) {
		this.id = id;
	}
	@Override
	public String execute() throws Exception {
		log.debug(id);
		DeptDao dao = new DeptDao();
		bean = dao.findOne(id);
		return SUCCESS;
	}
}
---------------- dept/detail.jsp
<body>
	<form action="update.action" method="post">
	<input type="hidden" name="id" value="${bean.id }"/>
		<div>
			<label>deptno</label>
			<input name="deptno" value="${bean.deptno }"/>
		</div>
		<div>
			<label>dname</label>
			<input name="dname" value="${bean.dname }"/>
		</div>
		<div>
			<label>loc</label>
			<input name="loc" value="${bean.loc }"/>
		</div>
		<div>
			<button>btn</button>
		</div>
	</form>
</body>
--------------- UpdateAction
package com.bit.action;

import com.bit.model.DeptDao;
import com.opensymphony.xwork2.Action;

public class UpdateAction implements Action {
	String id;
	int deptno;
	String dname;
	String loc;
	public void setId(String id) {
		this.id = id;
	}
	public void setDeptno(int deptno) {
		this.deptno = deptno;
	}
	public void setDname(String dname) {
		this.dname = dname;
	}
	public void setLoc(String loc) {
		this.loc = loc;
	}
	public String getId() {
		return id;
	}
	public int getDeptno() {
		return deptno;
	}
	public String getDname() {
		return dname;
	}
	public String getLoc() {
		return loc;
	}
	@Override
	public String execute() throws Exception {
		DeptDao dao = new DeptDao();
		if(dao.updateOne(id, deptno, dname , loc)>0) {
			return SUCCESS;
		} else {
			return INPUT;
		}
	}
}

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