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java ejb jsp未报告异常

转载 作者:行者123 更新时间:2023-12-01 14:02:21 33 4
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尝试使用 jsp 与 bean 交互,但是在运行时出现一些错误。

这是我在浏览器中看到的错误

生成的servlet错误: [javac] C:\Sun\AppServerNew\domains\domain1\generated\jsp\j2ee-apps\ConverterApp\war-ic_war\org\apache\jsp\index_jsp.java:21: 未报告的异常 javax.naming.NamingException;必须被捕获或宣布被扔出 [javac] InitialContext ic = new InitialContext(); ^

生成的servlet错误: [javac] C:\Sun\AppServerNew\domains\domain1\generated\jsp\j2ee-apps\ConverterApp\war-ic_war\org\apache\jsp\index_jsp.java:22:未报告的异常 javax.naming.NamingException;必须被捕获或宣布被扔出 [javac] 对象 objRef = ic.lookup("java:comp/env/ejb/Converter"); ^

生成的servlet错误: [javac] C:\Sun\AppServerNew\domains\domain1\generated\jsp\j2ee-apps\ConverterApp\war-ic_war\org\apache\jsp\index_jsp.java:24: 未报告的异常 javax.ejb.CreateException;必须被捕获或宣布被扔出 [javac]转换器= 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){}



}

转换器主页

package converter;
import java.rmi.RemoteException;
import javax.ejb.*;

public interface ConverterHome extends EJBHome {

Converter create() throws CreateException, RemoteException;



}

转换器

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;


}

最佳答案

index.jsp 中的 jspInit() 方法更改为:

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){
}
}

关于java ejb jsp未报告异常,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/19259001/

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