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

package com.liulu.bank.config;import org.springframework.web.WebApplicationInitializer;import org.springframework.web.filter.CharacterEncodingFilter;import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;import javax.servlet.FilterRegistration;import javax.servlet.ServletContext;import javax.servlet.ServletException;import java.nio.charset.StandardCharsets;/** * User : liulu * Date : 2016-10-7 15:12 */public class WebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer implements WebApplicationInitializer { @Override protected Class<?>[] getRootConfigClasses() { return new Class<?>[]{RootConfig.class}; } @Override protected Class<?>[] getServletConfigClasses() { return new Class<?>[]{WebConfig.class}; } /** * 配置DispatcherServlet 匹配的路径 * @return */ @Override protected String[] getServletMappings() { return new String[]{"/"}; } /** * 配置其他的 servlet 和 filter * * @param servletContext * @throws ServletException */ @Override public void onStartup(ServletContext servletContext) throws ServletException { FilterRegistration.Dynamic encodingFilter = servletContext.addFilter("encodingFilter", CharacterEncodingFilter.class); encodingFilter.setInitParameter("encoding", String.valueOf(StandardCharsets.UTF_8)); encodingFilter.setInitParameter("forceEncoding", "true"); encodingFilter.addMappingForUrlPatterns(null, false, "/*"); }}

配置 applicationContext.xml，由RootConfig类实现

package com.liulu.bank.config;import com.mchange.v2.c3p0.ComboPooledDataSource;import org.springframework.context.annotation.*;import org.springframework.core.env.Environment;import org.springframework.jdbc.core.JdbcTemplate;import org.springframework.jdbc.datasource.DataSourceTransactionManager;import org.springframework.stereotype.Controller;import org.springframework.transaction.PlatformTransactionManager;import org.springframework.transaction.annotation.EnableTransactionManagement;import javax.annotation.Resource;import javax.sql.DataSource;import java.beans.PropertyVetoException;/** * User : liulu * Date : 2016-10-7 15:36 */@Configuration@PropertySource("classpath:config.properties") // 导入属性文件@EnableAspectJAutoProxy // 相当于 xml 中的 <aop:aspectj-autoproxy/>@EnableTransactionManagement // 开启注解事务@ComponentScan(basePackages = {"com.liulu.lit", "com.liulu.bank"}, excludeFilters = @ComponentScan.Filter(classes = Controller.class ))public class RootConfig { // 上面导入的属性文件中的属性会 注入到 Environment 中 @Resource private Environment env; /** * 配置数据库连接池 c3p0， * @return * @throws PropertyVetoException */ @Bean public DataSource dataSource() throws PropertyVetoException { ComboPooledDataSource dataSource = new ComboPooledDataSource(); dataSource.setJdbcUrl(env.getProperty("db.url")); dataSource.setDriverClass(env.getProperty("db.driver")); dataSource.setUser(env.getProperty("db.user")); dataSource.setPassword(env.getProperty("db.password")); dataSource.setMinPoolSize(Integer.valueOf(env.getProperty("pool.minPoolSize"))); dataSource.setMaxPoolSize(Integer.valueOf(env.getProperty("pool.maxPoolSize"))); dataSource.setAutoCommitOnClose(false); dataSource.setCheckoutTimeout(Integer.valueOf(env.getProperty("pool.checkoutTimeout"))); dataSource.setAcquireRetryAttempts(2); return dataSource; } /** * 配置事物管理器 * @param dataSource * @return */ @Bean public PlatformTransactionManager transactionManager(DataSource dataSource) { return new DataSourceTransactionManager(dataSource); } @Bean public JdbcTemplate jdbcTemplate (DataSource dataSource) { return new JdbcTemplate(dataSource); }}

config.properties 文件在 resources 目录下

#数据库配置db.url=jdbc:mysql://192.168.182.135:3306/bankdb.driver=com.mysql.jdbc.Driverdb.user=rootdb.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

package com.liulu.bank.config;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.ComponentScan;import org.springframework.context.annotation.Configuration;import org.springframework.stereotype.Controller;import org.springframework.web.servlet.ViewResolver;import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;import org.springframework.web.servlet.config.annotation.EnableWebMvc;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;import org.thymeleaf.TemplateEngine;import org.thymeleaf.spring4.SpringTemplateEngine;import org.thymeleaf.spring4.templateresolver.SpringResourceTemplateResolver;import org.thymeleaf.spring4.view.ThymeleafViewResolver;import org.thymeleaf.templatemode.TemplateMode;import java.nio.charset.StandardCharsets;/** * User : liulu * Date : 2016-10-7 15:16 */@Configuration@EnableWebMvc // 启用 SpringMVC ，相当于 xml中的 <mvc:annotation-driven/>@ComponentScan(basePackages = {"com.liulu.bank.controller", "com.liulu.lit"}, includeFilters = @ComponentScan.Filter(classes = Controller.class), useDefaultFilters = false)public class WebConfig extends WebMvcConfigurerAdapter { /** * 设置由 web容器处理静态资源 ，相当于 xml中的<mvc:default-servlet-handler/> */ @Override public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) { configurer.enable(); } /** * 下面三个bean 配置 Thymeleaf 模板 * @return */ @Bean public SpringResourceTemplateResolver templateResolver() { SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver(); templateResolver.setPrefix("/WEB-INF/templates/"); templateResolver.setSuffix(".html"); templateResolver.setTemplateMode(TemplateMode.HTML); templateResolver.setCharacterEncoding(String.valueOf(StandardCharsets.UTF_8)); return templateResolver; } @Bean public TemplateEngine templateEngine(SpringResourceTemplateResolver templateResolver) { SpringTemplateEngine templateEngine = new SpringTemplateEngine(); templateEngine.setTemplateResolver(templateResolver); return templateEngine; } @Bean public ViewResolver viewResolver(TemplateEngine templateEngine) { ThymeleafViewResolver viewResolver = new ThymeleafViewResolver(); viewResolver.setTemplateEngine(templateEngine); viewResolver.setCharacterEncoding(String.valueOf(StandardCharsets.UTF_8)); return viewResolver; }}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。