logic:iterate über ArrayList, die ArrayLists beinhaltet

Andron · 20. Dezember 2007

request.getAttribute() liefert Objekte zurück.
Versuch mal so:

Java:

ArrayList surveyData = (ArrayList) request.getAttribute("surveyBody");
System.out.println(surveyData .size());

ArrayList data1 = (ArrayList)surveyData.get(0);
System.out.println(data1.size());
System.out.println(data1.get(0).getDayProp());

samtpfotegt3 · 20. Dezember 2007

Andron, Zeile 1 und 2 laufen - in Zeile 4 (erster Zugriff per "get") gibt es eine

"ServletException in '/tiles/surveyBodyRight.jsp': app.sbRow",

wobei "sbRow" weiter oben noch "surveyBodyOuterRowBean" war. Ist diese Bean falsch programmiert?

Andron · 20. Dezember 2007

Was wird in Zeile 2 ausgegeben?
Kannst du vielleicht die Fehlermeldung komplett posten?
Wie baust du dir die ArrayLists zusammen?

samtpfotegt3 · 20. Dezember 2007

Ich fülle die innere ArrayList testweise wie folgt:

Code:

ArrayList inneral = new ArrayList();
				
sbCol col = new sbCol();
col.setCol("H");
inneral.add(col);
col = new sbCol();
col.setCol("e");
inneral.add(col);
col = new sbCol();
col.setCol("y");
inneral.add(col);

Die äußere:

Code:

ArrayList outeral = new ArrayList();

sbRow row = new sbRow();
row.setRow(inneral);
outeral.add(row);

Dann:

Code:

req.setAttribute("surveyBody", outeral);

Die Zeilen

Code:

ArrayList surveyData = (ArrayList) request.getAttribute("surveyBody");
out.println(surveyData.size());

geben

1

als Ergebnis in der JSP aus.

Catalina.log sagt in Deiner Zeile 4:

Code:

20.12.2007 17:40:47 org.apache.struts.taglib.tiles.InsertTag$InsertHandler doEndTag
SCHWERWIEGEND: ServletException in '/tiles/surveyBodyRight.jsp': app.sbRow
org.apache.jasper.JasperException: Exception in JSP: /tiles/surveyBodyRight.jsp:45

42: 
43: ArrayList surveyData = (ArrayList) request.getAttribute("surveyBody");
44: out.println(surveyData.size());
45: ArrayList data1 = (ArrayList)surveyData.get(0);
46: %>
47: 
48: </table>


Stacktrace:
	at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:506)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:395)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
	at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
	at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:602)
	at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:99)
	at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:135)
	at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:760)
	at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:892)
	at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:462)
	at org.apache.jsp.pages.surveyLayout_jsp._jspx_meth_tiles_insert_1(surveyLayout_jsp.java:144)
	at org.apache.jsp.pages.surveyLayout_jsp._jspService(surveyLayout_jsp.java:79)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
	at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
	at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263)
	at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:239)
	at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:302)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
	at java.lang.Thread.run(Unknown Source)

Die Beans sehen wie folgt aus:

Code:

package app;

public class sbCol {
	private String col; // Property of a Day
	
	public void setCol(String col) {
		this.col = col;
	}
	public String getCol() {
		return col;
	}
}

und

Code:

package app;
import java.util.ArrayList;

public class sbRow {
	private ArrayList row; // je eine Datenreihe pro User 
	
	public void setRow(ArrayList row) {
		this.row = row;
	}
	public ArrayList getRow() {
		return row;
	}
}

Andron · 20. Dezember 2007

Ok, dann schauen wir mal, was da passiert:
Mit

Java:

ArrayList surveyData = (ArrayList) request.getAttribute("surveyBody");

holst du dir die äußere Liste.

Dann holst du dir das erste Element aus der Liste und das ist bei dir vom Typ sbRow nehme ich mal an.

Java:

sbRow sb_row = (sbRow) surveyData.get(0);

Als Anmerkung: die Klassennamen sollten mit einer Großbuchstabe beginnen.

Jetzt holst du mit der Getter-Methode die zweite Liste:

Java:

(ArrayList) innereListe = (ArrayList)sb_row.getRow();

Und jetzt eine Testausgabe:

Java:

System.out.println(innereListe.size());

Hoffe, habe deinen Code richtig verstanden.

samtpfotegt3 · 20. Dezember 2007

Grummel

Bereits Zeile 2:

Code:

sbRow sb_row = (sbRow) surveyData.get(0);

throws

Code:

20.12.2007 20:01:05 org.apache.struts.taglib.tiles.InsertTag$InsertHandler doEndTag
SCHWERWIEGEND: ServletException in '/tiles/surveyBodyRight.jsp': Unable to compile class for JSP

An error occurred at line: 37 in the jsp file: /tiles/surveyBodyRight.jsp
Generated servlet error:
sbRow cannot be resolved to a type

An error occurred at line: 37 in the jsp file: /tiles/surveyBodyRight.jsp
Generated servlet error:
sbRow cannot be resolved to a type


org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 37 in the jsp file: /tiles/surveyBodyRight.jsp
Generated servlet error:
sbRow cannot be resolved to a type

An error occurred at line: 37 in the jsp file: /tiles/surveyBodyRight.jsp
Generated servlet error:
sbRow cannot be resolved to a type


	at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
	at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
	at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
	at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:602)
	at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:99)
	at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:135)
	at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:760)
	at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:892)
	at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:462)
	at org.apache.jsp.pages.surveyLayout_jsp._jspx_meth_tiles_insert_1(surveyLayout_jsp.java:144)
	at org.apache.jsp.pages.surveyLayout_jsp._jspService(surveyLayout_jsp.java:79)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
	at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
	at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263)
	at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:239)
	at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:302)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
	at java.lang.Thread.run(Unknown Source)

Das mit dem Großbuchstaben ist ein Best Practice oder kann das wirklich Fehler verursachen?

samtpfotegt3 · 20. Dezember 2007

Könnte es gar etwas mit dem Tiles-Framework zu tun haben, das ich verwende

Code:

20.12.2007 20:01:05 org.apache.struts.taglib.tiles.InsertTag$InsertHandler doEndTag

Andron · 20. Dezember 2007

Vielleicht musst du die Klasse in deine JSP erst importieren:

<% import="app.sbRow" scope="session"%>

samtpfotegt3 · 20. Dezember 2007

Danke, hat schon etwas weitergeholfen, aber:

Code:

20.12.2007 20:48:46 org.apache.struts.taglib.tiles.InsertTag$InsertHandler doEndTag
SCHWERWIEGEND: ServletException in '/tiles/surveyBodyRight.jsp': Unable to compile class for JSP

An error occurred at line: 38 in the jsp file: /tiles/surveyBodyRight.jsp
Generated servlet error:
Syntax error, insert ";" to complete Statement

An error occurred at line: 38 in the jsp file: /tiles/surveyBodyRight.jsp
Generated servlet error:
Syntax error, insert "AssignmentOperator ArrayInitializer" to complete ArrayInitializerAssignement


org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 38 in the jsp file: /tiles/surveyBodyRight.jsp
Generated servlet error:
Syntax error, insert ";" to complete Statement

An error occurred at line: 38 in the jsp file: /tiles/surveyBodyRight.jsp
Generated servlet error:
Syntax error, insert "AssignmentOperator ArrayInitializer" to complete ArrayInitializerAssignement


    at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
    at org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:574)
    at org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:499)
    at org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:966)
    at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:602)
    at org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:99)
    at org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:135)
    at org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:760)
    at org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:892)
    at org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:462)
    at org.apache.jsp.pages.surveyLayout_jsp._jspx_meth_tiles_insert_1(surveyLayout_jsp.java:144)
    at org.apache.jsp.pages.surveyLayout_jsp._jspService(surveyLayout_jsp.java:79)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
    at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1085)
    at org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263)
    at org.apache.struts.tiles.TilesRequestProcessor.processTilesDefinition(TilesRequestProcessor.java:239)
    at org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:302)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:241)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
    at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
    at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
    at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
    at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
    at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
    at java.lang.Thread.run(Unknown Source)

Komisch, denn ein ";" fehlt da nicht...

Code:

ArrayList surveyData = (ArrayList) request.getAttribute("surveyBody");
sbRow sb_row = (sbRow) surveyData.get(0);
(ArrayList) innereListe = (ArrayList) sb_row.getRow();
System.out.println(innereListe.size());

Andron · 20. Dezember 2007

Versuch mal so:

Java:

ArrayList surveyData = (ArrayList) request.getAttribute("surveyBody");
sbRow sb_row = (sbRow) surveyData.get(0);
ArrayList innereListe = (ArrayList) sb_row.getRow();
System.out.println(innereListe.size());

logic:iterate über ArrayList, die ArrayLists beinhaltet

Andron

Erfahrenes Mitglied

samtpfotegt3

Grünschnabel

Andron

Erfahrenes Mitglied

samtpfotegt3

Grünschnabel

Andron

Erfahrenes Mitglied

samtpfotegt3

Grünschnabel

samtpfotegt3

Grünschnabel

Andron

Erfahrenes Mitglied

samtpfotegt3

Grünschnabel

Andron

Erfahrenes Mitglied

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