java ejb jsp未報告的異常
[英]java ejb jsp unreported exception
問題描述
嘗試使用jsp與Bean交互時，在運行它時會遇到一些錯誤。
這是我在瀏覽器中看到的錯誤
生成的servlet錯誤：[javac] C：\\ Sun \\ AppServerNew \\ domains \\ domain1 \\ Generated \\ jsp \\ j2ee-apps \\ ConverterApp \\ war-ic_war \\ org \\ apache \\ jsp \\ index_jsp.java：21：未報告的異常javax.naming。 NamingException; 必須被捕獲或聲明為拋出[javac] InitialContext ic = new InitialContext（）; ^
生成的servlet錯誤：[javac] C：\\ Sun \\ AppServerNew \\ domains \\ domain1 \\ Generated \\ jsp \\ j2ee-apps \\ ConverterApp \\ war-ic_war \\ org \\ apache \\ jsp \\ index_jsp.java：22：未報告的異常javax.naming。 NamingException; 必須被捕獲或聲明為拋出[javac]對象objRef = ic.lookup（“ java：comp / env / ejb / Converter”）; ^
生成的servlet錯誤：[javac] C：\\ Sun \\ AppServerNew \\ domains \\ domain1 \\ Generated \\ jsp \\ j2ee-apps \\ ConverterApp \\ war-ic_war \\ org \\ apache \\ jsp \\ index_jsp.java：24：未報告的異常javax.ejb。 CreateException; 必須被捕獲或聲明為拋出[javac] converter = home.create（）;
index.jsp
<%@ page import="converter.Converter, converter.ConverterHome, java.math.*, javax.ejb.*, javax.naming.*,
javax.rmi.PortableRemoteObject, java.rmi.RemoteException" %>
<%!
private Converter converter = null;
public void jspInit() {
try {
InitialContext ic = new InitialContext();
Object objRef = ic.lookup("java:comp/env/ejb/Converter");
ConverterHome home = (ConverterHome)PortableRemoteObject.narrow(objRef, ConverterHome.class);
converter = home.create();
} catch (RemoteException ex) {
}
}
%>
<html>
<head>
<title>Converter</title>
</head>
<body bgcolor="white">
<h1><center>Converter</center></h1>
<hr>
<p>Enter an amount to convert:</p>
<form method="get">
<input type="text" name="amount" size="25">
<br>
<p>
<input type="submit" value="Submit">
<input type="reset" value="Reset">
</form>
<%
String amount = request.getParameter("amount");
if ( amount != null && amount.length() > 0 ) {
BigDecimal d = new BigDecimal (amount);
%>
<p><%= amount %> dollars are
<%= converter.dollarToYen(d) %> Yen.
<p><%= amount %> Yen are
<%= converter.yenToEuro(d) %> Euro.
<%
}
%>
</body>
</html>
ConverterBean
package converter;
import javax.ejb.*;
import java.math.*;
import java.rmi.*;
public class ConverterBean implements SessionBean {
BigDecimal yenRate = new BigDecimal("122.00");
BigDecimal euroRate = new BigDecimal("0.0077");
public BigDecimal dollarToYen(BigDecimal dollars) {
BigDecimal result = dollars.multiply(yenRate);
return result.setScale(2, BigDecimal.ROUND_UP);
}
public BigDecimal yenToEuro(BigDecimal yen) {
BigDecimal result = yen.multiply(euroRate);
return result.setScale(2, BigDecimal.ROUND_UP);
}
public void ejbActivate(){}
public void ejbPassivate(){}
public void ejbRemove(){}
public void ejbCreate(){}
public void setSessionContext(SessionContext ctx){}
}
ConverterHome
package converter;
import java.rmi.RemoteException;
import javax.ejb.*;
public interface ConverterHome extends EJBHome {
Converter create() throws CreateException, RemoteException;
}
變流器
package converter;
import java.rmi.RemoteException;
import javax.ejb.*;
import java.math.*;
public interface Converter extends EJBObject{
public BigDecimal dollarToYen(BigDecimal dollars)
throws RemoteException;
public BigDecimal yenToEuro(BigDecimal dollars)
throws RemoteException;
}
2 個解決方案
解決方案1
1 已采納 2013-10-08 21:55:25
將index.jsp的jspInit()方法更改為：
public void jspInit() {
try {
InitialContext ic = new InitialContext();
Object objRef = ic.lookup("java:comp/env/ejb/Converter");
ConverterHome home = (ConverterHome) PortableRemoteObject.narrow(objRef, ConverterHome.class);
converter = home.create();
}catch(NamingException ne){
}catch (RemoteException ex) {
}catch(CreateException ce){
}
}
解決方案2
0 2013-10-08 21:52:33
在RemoteException之后，需要在ur .jsp文件上放置NamingException和CreateException 。
Java錯誤：未報告的異常？
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