ssm（4）整合

1.spring的配置文件

1）配置數據源，2）使用ioc配置orm ，3）事務的管理，4）掃描哪些包

<?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:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
		http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
		http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

        <!--掃描的包-->
        <context:component-scan base-package="cn.crud">
            <!--排除的註解-->
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:exclude-filter>
            <context:exclude-filter type="annotation"
                                    expression="org.springframework.web.bind.annotation.ControllerAdvice"></context:exclude-filter>
        </context:component-scan>

        <!--添加資源-->
        <context:property-placeholder  location="classpath:datasouce-config.properties"></context:property-placeholder>

        <!--c3p0數據源-->
        <bean id="comboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="user" value="${jdbc.user}"></property>
            <property name="password" value="${jdbc.password}"></property>
            <property name="driverClass" value="${jdbc.driver}"></property>
            <property name="jdbcUrl" value="${jdbc.url}"></property>
            <!-- 其餘的一些配置.... -->
        </bean>

        <!--mybatis-->
        <bean id="sessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="comboPooledDataSource"></property>
            <property name="configLocation" value="classpath:mybatis-config.xml"></property>
            <property name="mapperLocations"  value="classpath:mapper/*.xml"></property>
        </bean>

        <!--mapper接口的加入到適配器中-->
        <bean id="configurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="cn.crud.dao"></property>
        </bean>

　　　　　<!--mapper批量處理，使用批量的sqlsession的getmapper方法，獲取的mapper而後進行sql操做，整個mapper是一個批量操做的-->
        <bean  id="sessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
            <constructor-arg  name="sqlSessionFactory" ref="sessionFactoryBean"></constructor-arg>
            <constructor-arg name="executorType" value="BATCH"></constructor-arg>
        </bean>

         <!--事務-->
         <bean id="dataSourceTransactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
             <property name="dataSource" ref="comboPooledDataSource"></property>
         </bean>

         <!--基於註解的方式-->
         <!--<tx:annotation-driven transaction-manager="dataSourceTransactionManager"></tx:annotation-driven>-->

         <!--基於配置的方式的事物-->
         <aop:config>
             <aop:pointcut id="pointcut" expression="execution(* cn.crud.service.*.*(..))"></aop:pointcut>
             <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut"></aop:advisor>
         </aop:config>

         <tx:advice  id="txAdvice" transaction-manager="dataSourceTransactionManager">
                <tx:attributes>
                    <tx:method name="*"/>
                    <tx:method name="get*" read-only="true"></tx:method>
                </tx:attributes>
         </tx:advice>
</beans>

 2.springmvc

1）掃描哪些註解，2）配置InternalResourceViewResolver，3）頁面的處理

<?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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
		http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
        
    <context:component-scan base-package="cn.crud.controller"  use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"></context:include-filter>
        <context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice"></context:include-filter>
    </context:component-scan>

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix"  value="/" ></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <mvc:default-servlet-handler></mvc:default-servlet-handler>

    <mvc:annotation-driven></mvc:annotation-driven>
</beans>

 3.mybatis的配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <settings>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>

    <typeAliases>
        <package name="com.crud.bean"/>
    </typeAliases>
　　
</configuration>

 4.generator的逆向配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <!--跟自定義的不要緊-->
    <!--<classPathEntry location="/Program Files/IBM/SQLLIB/java/db2java.zip" />-->
    <context id="DB2Tables" targetRuntime="MyBatis3">

        <!--忽略註釋-->
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>

        <!--鏈接數據庫-->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=utf8
&characterSetResults=utf8&useSSL=false&verifyServerCertificate=false&autoReconnct=true&autoReconnectForPools=true
&allowMultiQueries=true&serverTimezone=GMT%2B8"
                        userId="root"
                        password="cgz12345678">
        </jdbcConnection>

        <!--number是否轉換爲BigDecimal類型-->
        <javaTypeResolver >
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!--指定bean生成的位置-->
        <javaModelGenerator targetPackage="cn.crud.bean" targetProject="./MavenWebTest/src/main/java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!--指定mapper文件生成的位置-->
        <sqlMapGenerator targetPackage="mapper"  targetProject="./MavenWebTest/src/main/resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!--指定mapper接口生成的位置-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="cn.crud.dao"  targetProject="./MavenWebTest/src/main/java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <!--<table schema="DB2ADMIN" tableName="ALLTYPES" domainObjectName="Customer" >
            <property name="useActualColumnNames" value="true"/>

            <generatedKey column="ID" sqlStatement="DB2" identity="true" />

            <columnOverride column="DATE_FIELD" property="startDate" />
            忽略字段
            <ignoreColumn column="FRED" />
            從新取字段名
            <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" />
        </table>-->

        <!--生成表-->
        <table tableName="tab_emp" domainObjectName="Employee"></table>
        <table tableName="tab_dept" domainObjectName="Department"></table>
    </context>
</generatorConfiguration>

 5.ehcache配置//配置文件放在類路徑下自動加載

<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xsi:noNamespaceSchemaLocation="../config/ehcache.xsd">
 <!-- 磁盤保存路徑 -->
 <diskStore path="D:\ss\ehcache" />
 
 <defaultCache 
   maxElementsInMemory="10000" 
   maxElementsOnDisk="10000000"
   eternal="false" 
   overflowToDisk="true" 
   timeToIdleSeconds="120"
   timeToLiveSeconds="120" 
   diskExpiryThreadIntervalSeconds="120"
   memoryStoreEvictionPolicy="LRU">
 </defaultCache>
</ehcache>
 
<!-- 
屬性說明：
l diskStore：指定數據在磁盤中的存儲位置。
l defaultCache：當藉助CacheManager.add("demoCache")建立Cache時，EhCache便會採用<defalutCache/>指定的的管理策略
 
如下屬性是必須的：
l maxElementsInMemory - 在內存中緩存的element的最大數目 
l maxElementsOnDisk - 在磁盤上緩存的element的最大數目，如果0表示無窮大
l eternal - 設定緩存的elements是否永遠不過時。若是爲true，則緩存的數據始終有效，若是爲false那麼還要根據timeToIdleSeconds，timeToLiveSeconds判斷
l overflowToDisk - 設定當內存緩存溢出的時候是否將過時的element緩存到磁盤上
 
如下屬性是可選的：
l timeToIdleSeconds - 當緩存在EhCache中的數據先後兩次訪問的時間超過timeToIdleSeconds的屬性取值時，這些數據便會刪除，默認值是0,也就是可閒置時間無窮大
l timeToLiveSeconds - 緩存element的有效生命期，默認是0.,也就是element存活時間無窮大
 diskSpoolBufferSizeMB 這個參數設置DiskStore(磁盤緩存)的緩存區大小.默認是30MB.每一個Cache都應該有本身的一個緩衝區.
l diskPersistent - 在VM重啓的時候是否啓用磁盤保存EhCache中的數據，默認是false。
l diskExpiryThreadIntervalSeconds - 磁盤緩存的清理線程運行間隔，默認是120秒。每一個120s，相應的線程會進行一次EhCache中數據的清理工做
l memoryStoreEvictionPolicy - 當內存緩存達到最大，有新的element加入的時候， 移除緩存中element的策略。默認是LRU（最近最少使用），可選的有LFU（最不常使用）和FIFO（先進先出）
 -->

 6.測試文件

import cn.crud.bean.Employee;
import cn.crud.bean.EmployeeExample;
import cn.crud.dao.EmployeeMapper;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.io.File;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:springcontext.xml"})
public class SSMTest {
    @Autowired
    EmployeeMapper employeeMapper;
    @Test
    public void JdbcTest() throws Exception {
        String str = "/springcontext.xml";
        ClassPathXmlApplicationContext cpxac = new ClassPathXmlApplicationContext(str);
        Object comboPooledDataSource = cpxac.getBean(ComboPooledDataSource.class);
        Connection connection = ((ComboPooledDataSource) comboPooledDataSource).getConnection();
        System.out.println(connection);
        connection.close();
    }

    @Test
    public void TestMBG() throws Exception {
        String str = "MavenWebTest\\src\\main\\resources\\mbg.xml";
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        File configFile = new File(str);
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(configFile);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        myBatisGenerator.generate(null);
    }

    @Test
    public void TestMBGMybatis() throws Exception {
        //添加條件
        EmployeeExample employeeExample = new EmployeeExample();
        EmployeeExample.Criteria criteria = employeeExample.createCriteria();
        criteria.andEmpIdEqualTo(1);
        List<Employee> employees = employeeMapper.selectByExample(employeeExample);
        for (Employee employee : employees) {
            System.out.println(employee);
        }
    }
}