在上一篇jsf环境搭建的基础上 , 加入spring框架 , 先看下目录结构
src/main/resources 这个source folder 放置web项目所需的主要配置,打包时,会自动打包到WEB-INF下
首先看下pom.xml,需要引入一些依赖项:
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>yjmyzz</groupId> 5 <artifactId>jsf-web</artifactId> 6 <version>1.0</version> 7 <packaging>war</packaging> 8 9 10 <dependencies>11 <!-- 单元测试 -->12 <dependency>13 <groupId>junit</groupId>14 <artifactId>junit</artifactId>15 <version>4.7</version>16 <scope>test</scope>17 </dependency>18 19 <!-- jsf -->20 <dependency>21 <groupId>org.jboss.spec.javax.faces</groupId>22 <artifactId>jboss-jsf-api_2.1_spec</artifactId>23 <version>2.1.19.1.Final-redhat-1</version>24 <scope>compile</scope>25 </dependency>26 27 28 <!-- spring -->29 <dependency>30 <groupId>org.springframework</groupId>31 <artifactId>spring-context</artifactId>32 <version>4.0.2.RELEASE</version>33 </dependency>34 35 36 <dependency>37 <groupId>org.springframework</groupId>38 <artifactId>spring-web</artifactId>39 <version>4.0.2.RELEASE</version>40 </dependency>41 42 43 <!-- servlet支持 -->44 <dependency>45 <groupId>javax.servlet</groupId>46 <artifactId>servlet-api</artifactId>47 <version>2.5</version>48 </dependency>49 50 </dependencies>51 52 <build>53 <plugins>54 <plugin>55 <artifactId>maven-compiler-plugin</artifactId>56 <version>3.1</version>57 <configuration>58 <source>1.7</source>59 <target>1.7</target>60 </configuration>61 </plugin>62 <plugin>63 <artifactId>maven-war-plugin</artifactId>64 <version>2.3</version>65 <configuration>66 <warSourceDirectory>webapp</warSourceDirectory>67 <failOnMissingWebXml>false</failOnMissingWebXml>68 </configuration>69 </plugin>70 </plugins>71 </build>72 </project>
pom.xml
1. 自动加载配置文件
在web项目中,可以让spring自动加载配置文件(即上图中的src/main/resouces/spring下的xml文件),WEB-INF/web.xml中参考以下设置:
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> 3 <display-name>jsf-web</display-name> 4 5 <welcome-file-list> 6 <welcome-file>index.html</welcome-file> 7 </welcome-file-list> 8 9 <listener>10 <listener-class>11 org.springframework.web.context.ContextLoaderListener12 </listener-class>13 </listener> 14 15 <context-param>16 <param-name>contextConfigLocation</param-name>17 <param-value>18 classpath*:spring/applicationContext-*.xml19 </param-value>20 </context-param> 21 22 </web-app>
web.xml
解释一下: classpath*:spring/applicationContext-*.xml 这里表示将加载classpath路径下 spring目录下的所有以applicationContext-开头的xml文件 , 通常为了保持配置文件的清爽 , 我们会把配置分成多份 : 比如 applicationContext-db.xml 用来配置DataSource , applicationContext-cache.xml用来配置缓存...等等.
2.代码中如何取得ApplicationContext实例
1 package yjmyzz.utils; 2 3 import javax.faces.context.FacesContext; 4 import javax.servlet.ServletContext; 5 6 import org.springframework.context.ApplicationContext; 7 import org.springframework.web.context.support.WebApplicationContextUtils; 8 9 public class ApplicationContextUtils {10 11 public static ApplicationContext getApplicationContext() {12 ServletContext context = (ServletContext) FacesContext13 .getCurrentInstance().getExternalContext().getContext();14 ApplicationContext appctx = WebApplicationContextUtils15 .getRequiredWebApplicationContext(context);16 17 return appctx;18 }19 20 public static <T> T getBean(Class<T> t) {21 return getApplicationContext().getBean(t);22 }23 }ApplicationContextUtils
有了这个工具类 , 就可以方便的取得注入的Bean
3. 使用properties文件注入
为了演示注入效果,先定义一个基本的Entity类
1 package yjmyzz.entity; 2 3 import java.io.Serializable; 4 5 public class ProductEntity implements Serializable { 6 7 private static final long serialVersionUID = -2055674628624266800L; 8 /* 9 * 产品编码10 */11 private String productNo;12 13 /**14 * 产品名称15 */16 private String productName;17 18 /**19 * 产品ID20 */21 private Long productId;22 23 public String getProductNo() {24 return productNo;25 }26 27 public void setProductNo(String productNo) {28 this.productNo = productNo;29 }30 31 public String getProductName() {32 return productName;33 }34 35 public void setProductName(String productName) {36 this.productName = productName;37 }38 39 public Long getProductId() {40 return productId;41 }42 43 public void setProductId(Long productIdLong) {44 this.productId = productIdLong;45 }46 47 @Override48 public String toString() {49 return productId + "/" + productNo + "/" + productName;50 }51 52 }ProductEntity
然后在applicationContext-beans.xml中配置以下内容:
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://www.springframework.org/schema/beans 5 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"> 6 7 <bean id="propertyConfigurer" 8 class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> 9 <property name="locations">10 <list>11 <value>classpath:properties/*.properties</value>12 </list>13 </property>14 </bean>15 16 <bean id="productEntity" class="yjmyzz.entity.ProductEntity">17 <property name="productId" value="${product.id}" />18 <property name="productNo" value="${product.no}" />19 <property name="productName" value="${product.name}" />20 <!-- <property name="productId">21 <bean class="java.lang.Long">22 <constructor-arg index="0" value="${product.id}" />23 </bean>24 </property>25 -->26 </bean>27 </beans>spring配置文件
注:classpath:properties/*.properties表示运行时 , spring容器会自动加载classpath\properties目录下的所有以.properties后缀结尾的文件 , 我们在src/main/resources/properties/下放置一个product.properties属性文件 , 内容如下:
1 product.id=32 product.no=n953 product.name=phone
product.properties
该文件被spring自动加载后 , 就可以用里面定义的属性值 , 为Bean做setter属性注入 , 即配置文件中的<property name="productId" value="${product.id}" />
4.验证注入是否成功
在HomeController里 , 向Spring容器要一个Bean , 显示下它的属性:
1 package yjmyzz.controller; 2 3 import javax.faces.bean.ManagedBean; 4 5 import yjmyzz.entity.ProductEntity; 6 import yjmyzz.utils.ApplicationContextUtils; 7 8 @ManagedBean(name = "Home") 9 public class HomeController {10 11 public String sayHello() {12 13 ProductEntity product = ApplicationContextUtils14 .getBean(ProductEntity.class);15 16 return product.toString();17 }18 19 }HomeController
index.xhtml里仍然跟上篇相同:
1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 2 <html xmlns="http://www.w3.org/1999/xhtml" 3 xmlns:h="http://java.sun.com/jsf/html" 4 xmlns:f="http://java.sun.com/jsf/core" 5 xmlns:ui="http://java.sun.com/jsf/facelets"> 6 7 <h:head> 8 <title>jsf-web</title> 9 </h:head> 10 <body> 11 <h1>12 #{Home.sayHello()}13 14 </h1>15 </body> 16 </html>index.xhtml
最后部署到jboss上 , 运行截图如下:
随时随地看视频
