JavaBeans

JavaBeans縺ィ縺ッシ

繧オ繝シ繝悶Ξ繝繝医゛SP縺九i蜻シ縺ウ蜃コ縺怜庄閭ス縺ェJava繧ッ繝ゥ繧ケ
JavaBeans縺ィ縺縺迚ケ螳壹ョ繝ゥ繧、繝悶Λ繝ェ繧呈欠縺吶ョ縺ァ縺ッ縺ェ縺上゛SP縺九i蜿らァ縺吶k繧ッ繝ゥ繧ケ繧谷avaBeans縺ィ蜻シ縺カ
MVC繝「繝繝ォ縺ァ險縺Model縺ォ蠖薙◆繧翫√し繝シ繝舌シ蛛エ縺ァ蜍穂ス懊☆繧九

莉・荳九ョ繝ォ繝シ繝ォ繧呈戟縺溘○繧倶コ九〒JSP縺九i繧、繝ウ繧ケ繧ソ繝ウ繧ケ繧貞他縺ウ蜃コ縺怜庄閭ス縺ォ縺ェ繧九
繝サ諷」萓狗噪縺ォ繧ッ繝ゥ繧ケ蜷阪↓Bean繧剃サ倥¢繧
繝サSerializable繧、繝ウ繧ソ繝シ繝輔ぉ繧、繧ケ繧貞ョ溯」縺吶k
繝サ蠑墓焚辟。縺励さ繝ウ繧ケ繝医Λ繧ッ繧ソ繧貞ョ夂セゥ縺吶k
繝サ繝励Ο繝代ユ繧」(getter/setter)繧呈戟縺溘○繧

JSP縺ァ縺ョ菴ソ逕ィ譁ケ豕

JavaBeans繝ォ繝シ繝ォ繧偵け繝ゥ繧ケ縺ォ螳溯」縺吶k莠九〒繧、繝ウ繧ケ繧ソ繝ウ繧ケ蛹悶&繧後◆JavaBeans繧ッ繝ゥ繧ケ繧谷SP縺ァ蜿らァ縺吶k莠九ッ蜿ッ閭ス縺縺後
莉・荳九ョJavaBeans繧ソ繧ー繧堤畑縺繧倶コ九〒縲゛SP蜀縺ァ縺ョ邁。貎斐↑繧ッ繝ゥ繧ケ謫堺ス懊′蜿ッ閭ス
<jsp:useBean>
<jsp:setProperty>
<jsp:getProperty>

JSP縺九iJavaBeans繧ッ繝ゥ繧ケ繧偵う繝ウ繧ケ繧ソ繝ウ繧ケ蛹
<jsp:useBean
縲id="繧ェ繝悶ず繧ァ繧ッ繝亥錐(繧、繝ウ繧ケ繧ソ繝ウ繧ケ蜷)"
縲class="JavaBeans繧ッ繝ゥ繧ケ縺ョ螳悟ィ菫ョ鬟セ蜷"
縲scope="繧ケ繧ウ繝シ繝" />
JSP縺九iJavaBeans#Set繝励Ο繝代ユ繧」繧貞他縺ウ蜃コ縺
<jsp:setProperty
縲name="繧ェ繝悶ず繧ァ繧ッ繝亥錐(繧、繝ウ繧ケ繧ソ繝ウ繧ケ蜷)"
縲property="繝励Ο繝代ユ繧」蜷(JavaBeans繝ォ繝シ繝ォ蜿らァ)"
縲value="Set縺吶k蛟、" />
JSP縺九iJavaBeans#Set繝励Ο繝代ユ繧」繧貞他縺ウ蜃コ縺
<jsp:getProperty
縲name="繧ェ繝悶ず繧ァ繧ッ繝亥錐(繧、繝ウ繧ケ繧ソ繝ウ繧ケ蜷)"
縲property="繝励Ο繝代ユ繧」蜷(JavaBeans繝ォ繝シ繝ォ蜿らァ)" /><br/>

JSP縺九i縺ョJavaBeans繧ッ繝ゥ繧ケ繧、繝ウ繧ケ繧ソ繝ウ繧ケ蛻ゥ逕ィ

繧、繝ウ繧ケ繧ソ繝ウ繧ケ繧貞他縺ウ蜃コ縺

窶サ繝繝シ繧ソ蜿励¢貂。縺礼畑繧ッ繝ゥ繧ケ
package myPack;
import java.io.Serializable;
public class MyBean implements Serializable {
縲private String _mem;

縲public void setMem(String prm)
縲{
縲縲this._mem = prm;
縲}

縲public String getMem()
縲{
縲縲return this._mem;
縲}
}

窶サ繧オ繝シ繝仙エ(繧オ繝シ繝悶Ξ繝繝)
package myPack;
import myPack.MyBean;
@WebServlet("/myPack/myServlet")
public class myServlet extends HttpServlet {
@Override
縲protected void doPost(HttpServletRequest req, HttpServletResponse res) throws ス {
縲縲
縲縲MyBean m = new MyBean();
縲縲
縲縲繧、繝ウ繧ケ繧ソ繝ウ繧ケ螟画焚縺ク縲;ET/POST繝代Λ繝。繝シ繧ソ繧呈シ邏
縲縲m.setMem( req.getParameter("order1") );
縲縲
縲縲繝代Λ繝。繝シ繧ソ險ュ螳(繝代Λ繝。繝シ繧ソ蜷搾シ嗔rm)
縲縲req.setAttribute("prm", m);
縲縲窶サ繧、繝ウ繧ケ繧ソ繝ウ繧ケ繧谷SP縺ク騾」謳コ
縲縲
縲縲繝輔か繝ッ繝シ繝
縲縲RequestDispatcher dispatcher = req.getRequestDispatcher("ス.jsp");
縲縲dispatcher.forward(req, res);
縲}
}

窶サ繧ッ繝ゥ繧、繧「繝ウ繝亥エ(霆「騾∝医ヱ繧ケ.jsp)
<%@ page pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" %>
繧オ繝シ繝舌〒險ュ螳壹@縺溘け繝ゥ繧ケ縺ョ菴ソ逕ィ繧貞ョ夂セゥ
<jsp:useBean id="prm" class="myPack.MyBean" scope="request" />
JavaBeans縲榊盾辣ァ
<!DOCTYPE html>
<html>
<body>
繝ェ繧ッ繧ィ繧ケ繝医ヱ繝ゥ繝。繝シ繧ソ繧貞叙蠕
縲${param['螟画焚蜷']}

繧オ繝シ繝舌°繧画ク。縺輔l縺溷、繧貞叙蠕(繝輔か繝ッ繝シ繝画凾縺ョ縺ソ)
縲${requestScope['prm'].mem}
JSP縺九i繧イ繝繧ソ繝シ繝。繧ス繝繝峨r蜻シ縺ウ蜃コ縺吝エ蜷
縲繝サ get繧堤怐逡・
縲繝サ get莉・荳九ョ繝。繧ス繝繝牙錐縺ョ蜈磯ュ譁蟄励r蟆乗枚蟄励↓

</body>
</html>

JavaBeans繧ソ繧ー蛻ゥ逕ィ

<%@ page pageEncoding="UTF-8" contentType="text/html;charset=UTF-8" %>
<%@ page import="myPack.*" %>
JavaBeans繧ッ繝ゥ繧ケ繧偵う繝ウ繧ケ繧ソ繝ウ繧ケ蛹
<jsp:useBean id="b" class="myPack.MyBean" scope="request" />

<!DOCTYPE html>
<html>
<head>
縲<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
縲<title>蝠蜩∽ク隕ァ</title>
</head>
<body>
JavaBeans繧ッ繝ゥ繧ケ縺ョSet繝励Ο繝代ユ繧」繧貞他縺ウ蜃コ縺
縲<jsp:setProperty name="b" property="menu" value="test" />

JavaBeans繧ッ繝ゥ繧ケ縺ョGet繝励Ο繝代ユ繧」繧貞他縺ウ蜃コ縺
縲<jsp:getProperty name="b" property="menu" /><br/>
竊稚est
</body>
</html>

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