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1 环境准备
2 测试例子

集成JSF与Spring

参考：Spring JSF集成教程

集成两者很简单，首先要知道使用jsf的项目，从后端获取数据的方式都是在前台使用el表达式获取，只要将这个el表达式由servlet换成从spring容器获取即可。

关键点则在于，如何让jsf识别spring的bean，而不是servlet。

1 环境准备

1.1 pom依赖

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</artifactId>
    <version>4.1.4.RELEASE</version>
</dependency>

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-web</artifactId>
    <version>4.1.4.RELEASE</version>
</dependency>

<dependency>
    <groupId>javax.inject</groupId>
    <artifactId>javax.inject</artifactId>
    <version>1</version>
</dependency>

1.2 添加DelegatingVariableResolver

重点：在faces-config.xml中添加DelegatingVariableResolver。

<application>
    <el-resolver>
        org.springframework.web.jsf.el.SpringBeanFacesELResolver
    </el-resolver>
</application>

从名字可以看出el-resolver标签是委托变量解析器，SpringBeanFacesELResolver将jsf中的el解析为spring中的bean，即将JSF前端连接到Spring后端服务层。

1.3 添加spring框架监听器

<listener>
    <listener-class>
        org.springframework.web.context.ContextLoaderListener
    </listener-class>
</listener>
<listener>
    <listener-class>
        org.springframework.web.context.request.RequestContextListener
    </listener-class>
</listener>

2 测试例子

2.1 JSF页面car.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:h="http://java.sun.com/jsf/html"
    xmlns:ui="http://java.sun.com/jsf/facelets">
<h:head>
    <title>JSF Spring Integration</title>
</h:head>
<h:body>

    <h2>Car Names List</h2>

    <ul>

        <ui:repeat var="cars" value="#{carBean.fetchCarDetails()}">
            <li><h3>#{cars}</h3></li>
        </ui:repeat>

    </ul>
</h:body>
</html>

2.2 spring bean：CarBean.java

import java.util.List;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
@ManagedBean
@SessionScoped
public class CarBean {

    @Autowired
    CarDao carDao;

    public void setCarDao(CarDao carDao) {
        this.carDao = carDao;
    }

    public List<String> fetchCarDetails() {

        return carDao.getCarDetails();
    }

}

2.3 配置包扫描

applicationContext.xml

<context:component-scan base-package="com.journaldev.jsfspring" />

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