Spring–混合XML和JavaConfig

拼搏现实的明天。 2023-02-15 05:18 128阅读 0赞

Spring示例向您展示如何将Spring XML和JavaConfig混合在一起。

## 1.从Spring XML加载JavaConfig ##

一个Spring MVC示例，使用`@Configuration`加载所有内容，并且您想与`web.xml`集成

SpringWebConfig.java

package com.mkyong.form.config;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.web.servlet.config.annotation.EnableWebMvc;
    import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
    import org.springframework.web.servlet.view.InternalResourceViewResolver;
    import org.springframework.web.servlet.view.JstlView;
    
    @EnableWebMvc
    @Configuration
    @ComponentScan({ "com.mkyong.form.web", "com.mkyong.form.core" })
    public class SpringWebConfig extends WebMvcConfigurerAdapter {
    
    	@Override
    	public void addResourceHandlers(ResourceHandlerRegistry registry) {
    		registry.addResourceHandler("/resources/**")
                            .addResourceLocations("/resources/");
    	}
    
    	@Bean
    	public InternalResourceViewResolver viewResolver() {
    		InternalResourceViewResolver viewResolver = 
                            new InternalResourceViewResolver();
    		viewResolver.setViewClass(JstlView.class);
    		viewResolver.setPrefix("/WEB-INF/views/jsp/");
    		viewResolver.setSuffix(".jsp");
    		return viewResolver;
    	}
    	
    }

web.xml

<web-app 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_2_5.xsd"
    	version="2.5">
    
    	<display-name>Spring3 MVC Application</display-name>
    
    	<servlet>
    		<servlet-name>spring-web</servlet-name>
    		<servlet-class>
                           org.springframework.web.servlet.DispatcherServlet
                    </servlet-class>
    		<load-on-startup>1</load-on-startup>
    		<init-param>
    			<param-name>contextConfigLocation</param-name>
    			<param-value>/WEB-INF/spring-web-servlet-config.xml</param-value>
    		</init-param>
    	</servlet>
    
    	<servlet-mapping>
    		<servlet-name>spring-web</servlet-name>
    		<url-pattern>/</url-pattern>
    	</servlet-mapping>
    
    </web-app>

在Spring XML文件中，只需扫描Java `@Configuration` 。

spring-web-servlet-config.xml

做完了

## 2.从JavaConfig加载Spring XML ##

这更简单，只需使用`@ImportResource`批注。

2.1加载`spring-web-servlet.xml`文件。

import org.springframework.context.annotation.Configuration;
    import org.springframework.context.annotation.ImportResource;
    import org.springframework.context.annotation.Import;
     
    @Configuration
    @Import({ AppConfigOthers.class }) //loads another JavaConfig
    @ImportResource("classpath:/config/spring-web-servlet.xml")
    public class AppConfigCore {
     	//...
    }

2.2从XML文件加载dataSource bean。

database-config.xml

@Configuration
    @Import({ AppConfigOthers.class })
    @ImportResource("classpath:/config/database-config.xml")
    public class AppConfigCore {
     
    	@Autowired
    	DataSource dataSource;
     
    	@Bean
    	public JdbcTemplate getJdbcTemplate() {
    		return new JdbcTemplate(dataSource);
    	}

2.3加载多个Spring XML文件

@Configuration
    @Import({ AppConfigOthers.class })
    @ImportResource({
         "classpath:/config/spring-web-servlet.xml", 
         "classpath:/config/database-config.xml"
    })
    public class AppConfigCore {
     
    	@Autowired
    	DataSource dataSource;
     
    	@Bean
    	public JdbcTemplate getJdbcTemplate() {
    		return new JdbcTemplate(dataSource);
    	}

## 参考文献 ##

1.  [组合配置样式][Link 1]

标签： [javaconfig][] [spring][] [spring mvc][]

> 翻译自: [https://mkyong.com/spring/spring-mixing-xml-and-javaconfig/][https_mkyong.com_spring_spring-mixing-xml-and-javaconfig]

[Link 1]: http://docs.spring.io/spring-javaconfig/docs/1.0.0.M4/reference/html/ch06.html
[javaconfig]: https://mkyong.com/tag/javaconfig/
[spring]: https://mkyong.com/tag/spring/
[spring mvc]: https://mkyong.com/tag/spring-mvc/
[https_mkyong.com_spring_spring-mixing-xml-and-javaconfig]: https://mkyong.com/spring/spring-mixing-xml-and-javaconfig/