在 servlet 3.0 開始web項目可以完全不需要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), 持久層使用的 spring的 JdbcTemplate， PS：推薦一個很好用的對JdbcTemplate封裝的框架：https://github.com/selfly/dexcoder-assistant 。 下面開始具體的配置：
配置spring mvc DispatcherServlet
DispatcherServlet 是spring mvc的核心， Spring 提供了一個快速配置DispatcherServlet的類 AbstractAnnotationConfigDispatcherServletInitializer，具體代碼如下：
其中 onStartup() 是 WebApplicationInitializer 接口中的方法，用戶配置其他的 filter 和 listener
getRootConfigClasses() 獲取配置類，我理解的相當於 applicationContext.xml 創建的上下文
getServletConfigClasses()獲取配置類，相當於 mvc-servlet.xml 創建的上下文
此類上不需要任何注解，
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 匹配的路徑
* @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類實現
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") // 導入屬性文件
@EnableAspectJAutoProxy // 相當於 xml 中的 <aop:aspectj-autoproxy/>
@EnableTransactionManagement // 開啟注解事務
@ComponentScan(basePackages = {"com.liulu.lit", "com.liulu.bank"}, excludeFilters = @ComponentScan.Filter(classes = Controller.class ))
public class RootConfig {
// 上面導入的屬性文件中的屬性會 注入到 Environment 中
@Resource
private Environment env;
/**
* 配置數據庫連接池 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 目錄下
#數據庫配置
db.url=jdbc:mysql://192.168.182.135:3306/bank
db.driver=com.mysql.jdbc.Driver
db.user=root
db.password=123456
#數據庫連接池配置
#連接池中保留的最小連接數
pool.minPoolSize=5
#連接池中保留的最大連接數
pool.maxPoolSize=30
#獲取連接超時時間
pool.checkoutTimeout=1000
配置 servlet.xml, 由WebConfig類實現
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 // 啟用 SpringMVC ，相當於 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 {
/**
* 設置由 web容器處理靜態資源 ，相當於 xml中的<mvc:default-servlet-handler/>
*/
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
/**
* 下面三個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;
}
}
SpringMVC總結篇 http://www.linuxidc.com/Linux/2016-06/132659.htm
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SpringMVC的亂碼處理 http://www.linuxidc.com/Linux/2015-07/120542.htm
Spring MVC整合Freemarker基於注解方式 http://www.linuxidc.com/Linux/2013-02/79660.htm
SpringMVC詳細示例實戰教程 http://www.linuxidc.com/Linux/2015-06/118461.htm
SpringMVC 異常處理 http://www.linuxidc.com/Linux/2015-06/119049.htm
Spring + Spring MVC + Ibatis + Velocity 框架搭建 http://www.linuxidc.com/Linux/2016-10/135846.htm
