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jsf之登陆

程序员文章站 2024-03-13 16:30:51
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一环境搭建:
1,创建WebProject
2,添加jsf jar包:jsf-api.jar jsf-impl.jar
3,配置web.xml文件 即可


知识点:
1,xhtml中#表示延迟取值:什么时候用什么时候计算值
jsp中用$表示及时取值:立马计算并赋值


二实例登陆
1,web.xml文件配置
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>javax.faces.DEFAULT_SUFFIX</param-name>
<param-value>.xhtml</param-value>
</context-param>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>
</web-app>


2,登陆login.xhtml,注意该页面不能直接请求(只能从别的jsp也跳转)
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core" xml:lang="en" lang="en">
<h:head>
<title>Login</title>
</h:head>
<h:body>
<h:form>
<h3>Please enter your username and password.</h3>
<table>
<tr>
<td>userName:</td>
<td><h:inputText value="#{user.name}"/></td>
</tr>
<tr>
<td>Password:</td>
<td><h:inputText value="#{user.password}"/></td>
</tr>
</table>
<p><h:commandButton value="Login" action="#{user.login}"/></p>
</h:form>
</h:body>
</html>


3,与前台绑定的类(包括绑定的属性和方法) UserBean .java
package com.jsf.bean;
import java.io.Serializable;
import javax.enterprise.context.SessionScoped;
import javax.faces.bean.ManagedBean;
import javax.inject.Named;
@Named("user")
@ManagedBean(name="user")
@SessionScoped
public class UserBean implements Serializable {
private String name;
private String password;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String login()
{
if("chenchaoyang".equals(getName()) && "chenchaoyang".equals(getPassword())){
return "success";
}
return "fail";
}
}


4,登陆成功页面 success.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core" xml:lang="en" lang="en">
<h:head>
<title>Welcome</title>
</h:head>
<h:body>
${user.name} 登陆成功<br/>
下面的信息是从国际化资源中获得的:<br/>
<h:outputFormat value="#{msgs.success}">
<f:param value="#{user.name}"></f:param>
</h:outputFormat>
</h:body>
</html>


5,登陆失败页面fail.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core" xml:lang="en" lang="en">
<h:head>
<title>Welcome</title>
</h:head>
<h:body>
${user.name} 登陆失败<br/>
下面的信息是从国际化资源中取出来的:
<h:outputFormat value="#{msgs.fail}">
<f:param value="#{user.name}"></f:param>
</h:outputFormat>
</h:body>
</html>
相关标签: jsf