Spring MVC 完全注解方式配置web项目

    在 servlet 3.0 开始web项目可以完全不需要web.xml配置文件了,所以本文的配置只在支持servlet 3.0及以上的web容器中有效

  使用的是spring mvc (4.3.2.RELEASE) + thymeleaf(3.0.2.RELEASE), 持久层使用的 spring的 JdbcTemplate, PS:推荐一个很好用的对JdbcTemplate封装的框架:https://github.com/selfly/dexcoder-assistant  。 下面开始具体的配置:

配置spring mvc DispatcherServlet

DispatcherServlet 是spring mvc的核心, Spring 提供了一个快速配置DispatcherServlet的类 AbstractAnnotationConfigDispatcherServletInitializer,具体代码如下:

其中 onStartup()  是 WebApplicationInitializer 接口中的方法,用户配置其他的 filter 和 listener 

getRootConfigClasses() 获取配置类,我理解的相当于 applicationContext.xml 创建的上下文

getServletConfigClasses()获取配置类,相当于 mvc-servlet.xml 创建的上下文

此类上不需要任何注解,

 1 package com.liulu.bank.config;
 2 
 3 import org.springframework.web.WebApplicationInitializer;
 4 import org.springframework.web.filter.CharacterEncodingFilter;
 5 import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
 6 
 7 import javax.servlet.FilterRegistration;
 8 import javax.servlet.ServletContext;
 9 import javax.servlet.ServletException;
10 import java.nio.charset.StandardCharsets;
11 
12 /**
13  * User : liulu
14  * Date : 2016-10-7 15:12
15  */
16 public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer implements WebApplicationInitializer {
17 
18     @Override
19     protected Class<?>[] getRootConfigClasses() {
20         return new Class<?>[]{RootConfig.class};
21     }
22 
23     @Override
24     protected Class<?>[] getServletConfigClasses() {
25         return new Class<?>[]{WebConfig.class};
26     }
27 
28     /**
29      * 配置DispatcherServlet 匹配的路径
30      * @return
31      */
32     @Override
33     protected String[] getServletMappings() {
34         return new String[]{"/"};
35     }
36 
37     /**
38      * 配置其他的 servlet 和 filter
39      *
40      * @param servletContext
41      * @throws ServletException
42      */
43     @Override
44     public void onStartup(ServletContext servletContext) throws ServletException {
45         FilterRegistration.Dynamic encodingFilter = servletContext.addFilter("encodingFilter", CharacterEncodingFilter.class);
46         encodingFilter.setInitParameter("encoding", String.valueOf(StandardCharsets.UTF_8));
47         encodingFilter.setInitParameter("forceEncoding", "true");
48         encodingFilter.addMappingForUrlPatterns(null, false, "/*");
49     }
50 }

 

配置 applicationContext.xml,由RootConfig类实现

 1 package com.liulu.bank.config;
 2 
 3 import com.mchange.v2.c3p0.ComboPooledDataSource;
 4 import org.springframework.context.annotation.*;
 5 import org.springframework.core.env.Environment;
 6 import org.springframework.jdbc.core.JdbcTemplate;
 7 import org.springframework.jdbc.datasource.DataSourceTransactionManager;
 8 import org.springframework.stereotype.Controller;
 9 import org.springframework.transaction.PlatformTransactionManager;
10 import org.springframework.transaction.annotation.EnableTransactionManagement;
11 
12 import javax.annotation.Resource;
13 import javax.sql.DataSource;
14 import java.beans.PropertyVetoException;
15 
16 /**
17  * User : liulu
18  * Date : 2016-10-7 15:36
19  */
20 @Configuration
21 @PropertySource("classpath:config.properties") // 导入属性文件
22 @EnableAspectJAutoProxy // 相当于 xml 中的 <aop:aspectj-autoproxy/>
23 @EnableTransactionManagement // 开启注解事务
24 @ComponentScan(basePackages = {"com.liulu.lit", "com.liulu.bank"}, excludeFilters = @ComponentScan.Filter(classes = Controller.class  ))
25 public class RootConfig {
26 
27     // 上面导入的属性文件中的属性会 注入到 Environment 中
28     @Resource
29     private Environment env;
30 
31     /**
32      * 配置数据库连接池 c3p0,
33      * @return
34      * @throws PropertyVetoException
35      */
36     @Bean
37     public DataSource dataSource() throws PropertyVetoException {
38         ComboPooledDataSource dataSource = new ComboPooledDataSource();
39         dataSource.setJdbcUrl(env.getProperty("db.url"));
40         dataSource.setDriverClass(env.getProperty("db.driver"));
41         dataSource.setUser(env.getProperty("db.user"));
42         dataSource.setPassword(env.getProperty("db.password"));
43         dataSource.setMinPoolSize(Integer.valueOf(env.getProperty("pool.minPoolSize")));
44         dataSource.setMaxPoolSize(Integer.valueOf(env.getProperty("pool.maxPoolSize")));
45         dataSource.setAutoCommitOnClose(false);
46         dataSource.setCheckoutTimeout(Integer.valueOf(env.getProperty("pool.checkoutTimeout")));
47         dataSource.setAcquireRetryAttempts(2);
48         return dataSource;
49     }
50 
51     /**
52      * 配置事物管理器
53      * @param dataSource
54      * @return
55      */
56     @Bean
57     public PlatformTransactionManager transactionManager(DataSource dataSource) {
58         return new DataSourceTransactionManager(dataSource);
59     }
60 
61     @Bean
62     public JdbcTemplate jdbcTemplate (DataSource dataSource) {
63         return new JdbcTemplate(dataSource);
64     }
65 
66 
67 }

 

config.properties 文件在 resources 目录下 

#数据库配置
db.url=jdbc:mysql://192.168.182.135:3306/bank
db.driver=com.mysql.jdbc.Driver
db.user=root
db.password=123456

#数据库连接池配置
#连接池中保留的最小连接数
pool.minPoolSize=5
#连接池中保留的最大连接数
pool.maxPoolSize=30
#获取连接超时时间
pool.checkoutTimeout=1000

 

 配置 servlet.xml, 由WebConfig类实现

Thymeleaf  模板配置也在下面

 1 package com.liulu.bank.config;
 2 
 3 import org.springframework.context.annotation.Bean;
 4 import org.springframework.context.annotation.ComponentScan;
 5 import org.springframework.context.annotation.Configuration;
 6 import org.springframework.stereotype.Controller;
 7 import org.springframework.web.servlet.ViewResolver;
 8 import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
 9 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
10 import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
11 import org.thymeleaf.TemplateEngine;
12 import org.thymeleaf.spring4.SpringTemplateEngine;
13 import org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver;
14 import org.thymeleaf.spring4.view.ThymeleafViewResolver;
15 import org.thymeleaf.templatemode.TemplateMode;
16 
17 import java.nio.charset.StandardCharsets;
18 
19 /**
20  * User : liulu
21  * Date : 2016-10-7 15:16
22  */
23 @Configuration
24 @EnableWebMvc // 启用 SpringMVC ,相当于 xml中的 <mvc:annotation-driven/>
25 @ComponentScan(basePackages = {"com.liulu.bank.controller", "com.liulu.lit"},
26         includeFilters = @ComponentScan.Filter(classes = Controller.class),
27         useDefaultFilters = false)
28 public class WebConfig extends WebMvcConfigurerAdapter {
29 
30     /**
31      * 设置由 web容器处理静态资源 ,相当于 xml中的<mvc:default-servlet-handler/>
32      */
33     @Override
34     public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
35         configurer.enable();
36     }
37 
38     /**
39      * 下面三个bean 配置 Thymeleaf 模板
40      * @return
41      */
42     @Bean
43     public SpringResourceTemplateResolver templateResolver() {
44         SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
45         templateResolver.setPrefix("/WEB-INF/templates/");
46         templateResolver.setSuffix(".html");
47         templateResolver.setTemplateMode(TemplateMode.HTML);
48         templateResolver.setCharacterEncoding(String.valueOf(StandardCharsets.UTF_8));
49         return templateResolver;
50     }
51 
52     @Bean
53     public TemplateEngine templateEngine(SpringResourceTemplateResolver templateResolver) {
54         SpringTemplateEngine templateEngine = new SpringTemplateEngine();
55         templateEngine.setTemplateResolver(templateResolver);
56         return templateEngine;
57     }
58 
59     @Bean
60     public ViewResolver viewResolver(TemplateEngine templateEngine) {
61         ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
62         viewResolver.setTemplateEngine(templateEngine);
63         viewResolver.setCharacterEncoding(String.valueOf(StandardCharsets.UTF_8));
64         return viewResolver;
65     }
66 
67 }

 

posted @ 2016-10-16 21:43  Lius`  阅读(5860)  评论(0编辑  收藏  举报