SpringMVC數據庫鏈接池,以及其他相關配置

1.applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd     
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- 掃描的包 -->
    <!-- <context:component-scan base-package="app04"/> -->
    <!-- 使用轉換器 -->
    <!--<mvc:annotation-driven conversion-service="conversionService"/>-->
    <!-- 使用格式化 -->
    <!-- conversionService2 -->
   <!--  <mvc:annotation-driven conversion-service="conversionService2"/> -->
   
    <!-- 使用注冊器替代格式化 -->
    <!-- <mvc:annotation-driven />意思是開啟使用注釋的功能-->
    <!-- conversionService3是格式化或者轉換器 -->
    <!-- <mvc:annotation-driven conversion-service="conversionService3"/> -->
   
    <!-- 掃描的包 -->
    <context:component-scan base-package="sfk.bbs.test.testSpringMVCConfig.action"/>
    <!-- 這個的作用是讓DispatcherServlet不將下列路徑理解為一個request請求,
    在項目中,這個是必須的,如果沒有加這些就可能造成上述問題 -->
    <mvc:annotation-driven />
    <mvc:resources mapping="/css/**" location="/css/"/>
    <mvc:resources mapping="/js/**" location="/js/"/>
    <mvc:resources mapping="/*.html" location="/"/>
    
    <!-- 視圖解析器 -->   
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!-- 讀取配置文件信息,在Spring的配置文件中使用EL表達式填充值 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!-- 配置數據庫連接池 -->
    <bean id="dataSourceLocal" name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 指定連接數據庫的驅動-->
<property name="driverClass" value="${jdbc.driverClassName}"/>
<!-- 指定連接數據庫的URL-->
<property name="jdbcUrl" value="${jdbc.url}"/>
<!-- 指定連接數據庫的用戶名-->
<property name="user" value="${jdbc.username}"/>
<!-- 指定連接數據庫的密碼-->
<property name="password" value="${jdbc.password}"/>
<!-- 指定連接池中保留的最大連接數. Default:15-->
<property name="maxPoolSize" value="${jdbc.maxPoolSize}"/>
<!-- 指定連接池中保留的最小連接數-->
<property name="minPoolSize" value="${jdbc.minPoolSize}"/>
<!-- 指定連接池的初始化連接數 取值應在minPoolSize 與 maxPoolSize 之間.Default:3-->
<property name="initialPoolSize" value="${jdbc.initialPoolSize}"/>
<!-- 最大空閑時間,60秒內未使用則連接被丟棄。若為0則永不丟棄。 Default:0-->
<property name="maxIdleTime" value="${jdbc.maxIdleTime}"/>
<!-- 當連接池中的連接耗盡的時候c3p0一次同時獲取的連接數. Default:3-->
<property name="acquireIncrement" value="${jdbc.acquireIncrement}"/>
<!-- JDBC的標准,用以控制數據源內加載的PreparedStatements數量。
但由於預緩存的statements屬於單個connection而不是整個連接池所以設置這個參數需要考慮到多方面的因數.如果maxStatements與maxStatementsPerConnection均為0,則緩存被關閉。Default:0-->
<property name="maxStatements" value="${jdbc.maxStatements}"/>
<!-- 每60秒檢查所有連接池中的空閑連接.Default:0 -->
<property name="idleConnectionTestPeriod" value="${jdbc.idleConnectionTestPeriod}"/>
</bean>
    
    
    
    <!-- <bean id="dataSourceLocal" name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        制定連接數據庫的驅動
        <property name="driverClass" value="${jdbc.driverClassName}" />
        制定連接數據庫的URL
        <property name="jdbcUrl" value="${jdbc.url}" />
        指定連接數據庫的用戶名
        <property name="user" value="${jdbc.username}" />
        指定數據庫的密碼
        <property name="password" value="${jdbc.password}"/>
        指定連接池中保留的最大連接數 default:15
        <property name="maxPoolSize" value="${jdbc.maxPoolSize}"/>
        指定連接池中保留的最小連接數 
        <property name="minPoolSize" value="${jdbc.minPoolSize}" />
        指定連接池的初始化連接數 取值應在minPoolSize 與MaxPoolSize之間,Default:3
        <property name="initialPoolSize" value="${jdbc.initialPoolSize}"/>
        最大空閑時間,60秒內未使用連接被丟棄,若為0則永不丟棄,Default:0
        <property name="maxIdleTime" value="${jdbc.maxIdleTime}"/>
        當連接池中的連接耗盡的時候c3p0一次同時獲取的連接數. default: 3
        <property name="acquireIncrement" value="${jdbc.acquireIncrement}" />
        JDBC的標准,用以控制數據源內加載的prepareedStatement數量.但是由於預緩存的statements
        屬於單個connection而不是整個連接池所以色繪制這個參數需要考慮到多方面的因素,如果maxStatements
        與maxStatementsPerConnection均為0,則緩存被關閉,Default:0 
        <property name="maxStatements" value="${jdbc.maxStatements}"/>
        每60秒檢查所有連接池中的空閑連接default:0
        <property name="idleConnectionTestPeriod" value="${jdbc.idleConnectionTestPeriod}" />
    </bean> -->
    <!-- 錯誤提示信息配置,用配置文件管理錯誤信息 -->
    <!-- <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <property name="basename" value="/WEB-INF/resource/messages" />
    </bean> -->
    <!-- org.springframework.context.support.ConversionServiceFactoryBean.class -->
    <!-- 使用轉換器的bean -->
<!--     <bean id="conversionService" class="org.springframework.context.support.ConversionServiceFactoryBean">
        <property name="converters">
            <list>
                <bean class="app06a.converter.StringToDateConverter" >
                    <constructor-arg type="java.lang.String" value="MM-dd-yyyy"/>
                </bean>
            </list>
        </property>
    </bean>
     -->
    <!-- 使用Formatter的格式化 -->
<!--     <bean id="conversionService2" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
        <property name="formatters">
            <set>
            
            /springMVC/src/app06a/formatter/DateFormatter.java
                <bean class="app06a.formatter.DateFormatter">
                    <constructor-arg type="java.lang.String" value="MM-dd-yyyy"/>
                </bean>
            </set>
        </property>
    </bean> -->
    
        <!-- 使用注冊器替代Formatter的格式化 -->
<!--     <bean id="conversionService3" class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
        <property name="formatterRegistrars">
            <set>
            /springMVC/src/app06a/formatter/DateFormatter.java
                <bean class="app06a.formatter.MyFormatterRigistrar">
                    <constructor-arg type="java.lang.String" value="MM-dd-yyyy"/>
                </bean>
            </set>
        </property>
    </bean> -->
    
    
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>sfk_BBS02</display-name>
 
          <!-- <context-param>
            <param-name>contextConfigLocation</param-name>
             <param-value>classpath:applicationContext.xml</param-value>
        </context-param> -->
<!--   <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/resource/applicationContext.xml</param-value>
    </context-param> -->
    
    <!-- config log4j  first Part -->
     <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j.properties</param-value>
    </context-param>  
    <!-- /WEB-INF/classes/applicationContext-*.xml -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
         <param-value>/WEB-INF/classes/applicationContext.xml</param-value>
    </context-param> 
        <!-- Srping監聽器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener> 
    <!-- config log4j  second Part -->
    <!-- 加載log4j配置文件 -->
    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
         <init-param>
             <param-name>contextConfigLocation</param-name>
             <param-value>classpath:applicationContext.xml</param-value>
    
         </init-param>
    
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!-- 有的項目中這里寫的是.do,這樣分發器只會分發帶有.do的請求,
         就可以規避將js.css,.png等文件的路徑當作一個請求,當前沒有寫.do,就要用到
          <mvc:annotation-driven />
          <mvc:resources mapping="/css/**" location="/css/"/>
          將.css等文件不當作一個請求 -->
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

     <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
</web-app>

log4j.properties

#log4j.rootLogger=INFO,C,F
#first way log All
##########
# C,System.out
#log4j.appender.C.Threshold=INFO print info or above
##########
log4j.logger.sfk.bbs=INFO,C,F
#second way set log package 
log4j.appender.C=org.apache.log4j.ConsoleAppender
log4j.appender.C.Threshold=INFO 
log4j.appender.C.layout=org.apache.log4j.PatternLayout
log4j.appender.C.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %L %p %C{1} - %m%n

###########
#save in file
#log4j.appender.F.Threshold=INFO ,info or above
###########
log4j.appender.F=org.apache.log4j.DailyRollingFileAppender
# save file path
log4j.appender.F.File=/home/rocky/develop/luna/eclipse/logInfo/SpringMVC_log
log4j.appender.F.Append=true
log4j.appender.F.Threshold=INFO
log4j.appender.F.layout=org.apache.log4j.PatternLayout
log4j.appender.F.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %L %p %C{1} - %m%n

項目的結構圖

工具類

package sfk.bbs.common.SpringUtil;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * 1.Spring的工具類,現在主要用來獲取Spring配置文件中的bean
 * 2.這個方法里比較遺憾的是沒有用到implements ApplicationContextAware
 * 原因是在web.xml文件中沒有配置正確
 * @author rocky
 *
 */
public class SpringHelper
{
    private static  ApplicationContext applicationContext;

    
    @SuppressWarnings("static-access")
    public SpringHelper()
    {
        this.applicationContext =new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
    }

   /* @Override
    public void setApplicationContext(ApplicationContext applicationContext)
            throws BeansException
    {
        System.out.println("setApplicationContext : "+this.applicationContext);
        this.applicationContext = applicationContext;

    }*/
    
    public Object getBean(String beanId)
    {
        System.out.println("applicationContext : "+applicationContext);
        System.out.println("getBean : " + beanId);
        return applicationContext.getBean(beanId);
    }

}

測試類

package sfk.bbs.test.testSpringMVCConfig.action;


import java.sql.Connection;
import java.sql.SQLException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;

import org.apache.log4j.Logger;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.mchange.v2.c3p0.ComboPooledDataSource;

import sfk.bbs.common.SpringUtil.SpringHelper;
import sfk.bbs.common.constance.ActionURL;
import sfk.bbs.common.constance.PagePath;

@Controller
public class StudentAction
{
    private static Logger log = Logger.getLogger(StudentAction.class);
    /**
     * 1.現在的想法是把pages文件夾寫在SpringMVC的配置文件中,將后綴.jsp也寫在SpringMVC的配置文件中
     * 在Controller中page頁面寫成這樣"testPage/studentList
     * 斜杠左邊的pages文件夾下面的下一層文件夾,斜杠右邊的是jsp文件
     * 2.jsp文件名和requestMapping中的value相同
     * 3.注意:requestMapping不寫.do,頁面不寫.jsp
     * 
     * 查找所有的student列表
     * @param request request
     * @param response response
     * @param model model
     * @return studentList
     */
    @RequestMapping(value=ActionURL.STUDENT_LIST)
    public String findAllStudent(HttpServletRequest request,
            HttpServletResponse response,Model model)
    {
       SpringHelper springHelper = new SpringHelper();
        DataSource  datasource = (ComboPooledDataSource) springHelper.getBean("dataSourceLocal");
        Connection conn = null;
        try
        {
            conn = datasource.getConnection();
        } catch (SQLException e)
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        finally
        {
            try
            {
                conn.close();
            } catch (SQLException e)
            {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        System.out.println(conn);
        
         //ctx = new ("classpath:applicationContext.xml");
       // ApplicationContext ctx = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        //System.out.println("ctx : " + ctx);
        log.info("into findAllStudent");
        return PagePath.STUDENT_LIST;
    }
    
}