日期:2014-05-20  浏览次数:20585 次

奇怪了,jsf的el为什么老是显示不出呢~
刚开始在学习jsf,按照网上的一篇电子文档写的做:
web.xml配置:
XML code

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">
    <description>
JSF Demo
</description>
    <display-name>JSF Demo</display-name>
    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.faces</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>
</web-app>




UserBean:
Java code

public class UserBean {
    private String name;
    private String password;
    private String errMessage;

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getPassword() {
        return password;
    }

    public void setErrMessage(String errMessage) {
        this.errMessage = errMessage;
    }

    public String getErrMessage() {
        return errMessage;
    }

    public String verify() {
        if (!name.equals("golden") || !password.equals("123456")) {
            errMessage = "名称或密码错误";
            return "failure";
        } else {
            return "success";
        }
    }
}




faces-config.xml
XML code

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE faces-config PUBLIC
"-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.0//EN"
"http://java.sun.com/dtd/web-facesconfig_1_0.dtd">
<faces-config>
    <navigation-rule>
        <from-view-id>/pages/index.jsp</from-view-id>
        <navigation-case>
            <from-outcome>success</from-outcome>
            <to-view-id>/pages/welcome.jsp</to-view-id>
        </navigation-case>
        <navigation-case>
            <from-outcome>failure</from-outcome>
            <to-view-id>/pages/index.jsp</to-view-id>
        </navigation-case>
    </navigation-rule>
    <managed-bean>
        <managed-bean-name>user</managed-bean-name>
        <managed-bean-class>
            onlyfun.caterpillar.UserBean
        </managed-bean-class>
        <managed-bean-scope>session</managed-bean-scope>
    </managed-bean>
</faces-config>





index.jsp
JScript code

<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@page contentType="text/html;charset=GB2312"%>
<html>
<head>
<title>第一个JSF程序</title>
</head>
<body>
<f:view>
    <h:form>
        <h3>请输入您的名称</h3>
        <h:outputText value="#{user.errMessage}" />
        <p>名称: <h:inputText value="#{user.name}" />
        <p>密码: <h:inputSecret value="#{user.password}" />
        <p><h:commandButton value="送出" action="#{user.verify}" />
    </h:form>
</f:view>
</body>
</html>