好久沒給大家弄Java后端項(xiàng)目系列了，因?yàn)榻恿薐ava后端外包以及學(xué)習(xí)一些后端優(yōu)化的東西。而現(xiàn)在開始慢慢在這個(gè)系列的（三）逐漸把后端外包的一些有價(jià)值的東西分享給大家，并且自己也總結(jié)一遍嘛。

文章結(jié)構(gòu)：（1）項(xiàng)目環(huán)境搭建；（2）簡單業(yè)務(wù)邏輯測試框架；（3）項(xiàng)目配置注意點(diǎn)；（4）快速開發(fā)上手技巧；

一、項(xiàng)目環(huán)境搭建：

項(xiàng)目框架：Spring Data JPA+Spring+SpringMVC+Maven+JDK1.7+Tomcat7.0

使用IDEA開發(fā)

（1）Maven構(gòu)建：

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.fuzhu</groupId>
  <artifactId>springdatajpa</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>springdatajpa Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <properties>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

    <maven.build.timestamp.format>yyyyMMdd'T'HHmmss</maven.build.timestamp.format>
    <buildNumber>${maven.build.timestamp}</buildNumber>

    <maven.compiler.target>1.7</maven.compiler.target>
    <maven.compiler.source>1.7</maven.compiler.source>

    <java-version>1.7</java-version>

    <version-springframework>4.0.4.RELEASE</version-springframework>
    <version-slf4j>1.6.6</version-slf4j>
    <version-hibernate.validator>5.0.1.Final</version-hibernate.validator>
    <version-hibernate.jpa>1.0.1.Final</version-hibernate.jpa>
    <version-hibernate>4.2.6.Final</version-hibernate>
    <mysql.version>5.1.35</mysql.version>

  </properties>


  <dependencies>
    <!-- Spring MVC -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${version-springframework}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${version-springframework}</version>
    </dependency>
    <!-- spring 表達(dá)式語言 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>${version-springframework}</version>
    </dependency>
    <!-- 核心工具包 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${version-springframework}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${version-springframework}</version>
      <exclusions>
        <!-- Exclude Commons Logging in favor of SLF4j -->
        <exclusion>
          <groupId>commons-logging</groupId>
          <artifactId>commons-logging</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

    <!-- spring-context 的擴(kuò)展支持，用于 MVC 方面 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${version-springframework}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${version-springframework}</version>
    </dependency>
    <!-- springIoC（依賴注入）的基礎(chǔ)實(shí)現(xiàn) -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${version-springframework}</version>
    </dependency>
    <!-- Spring事務(wù)支持 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${version-springframework}</version>
    </dependency>
    <!-- spring 對Junit 等測試框架的簡單封裝 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${version-springframework}</version>
    </dependency>
    <!--hibernate的包-->
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-core</artifactId>
      <version>${version-hibernate}</version>
    </dependency>
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-entitymanager</artifactId>
      <version>${version-hibernate}</version>
      <exclusions>
        <exclusion>
          <artifactId>cglib</artifactId>
          <groupId>cglib</groupId>
        </exclusion>
        <exclusion>
          <artifactId>dom4j</artifactId>
          <groupId>dom4j</groupId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-validator</artifactId>
      <version>${version-hibernate.validator}</version>
    </dependency>
    <dependency>
      <groupId>org.hibernate.javax.persistence</groupId>
      <artifactId>hibernate-jpa-2.0-api</artifactId>
      <version>${version-hibernate.jpa}</version>
    </dependency>
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-ehcache</artifactId>
      <version>${version-hibernate}</version>
    </dependency>

    <!-- Spring data jpa -->
    <dependency>
      <groupId>org.springframework.data</groupId>
      <artifactId>spring-data-jpa</artifactId>
      <version>1.6.2.RELEASE</version>
    </dependency>

    <!-- AspectJ 切面-->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjrt</artifactId>
      <version>1.6.10</version>
    </dependency>

    <!-- Logging -->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${version-slf4j}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>jcl-over-slf4j</artifactId>
      <version>${version-slf4j}</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${version-slf4j}</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.15</version>
      <exclusions>
        <exclusion>
          <groupId>javax.mail</groupId>
          <artifactId>mail</artifactId>
        </exclusion>
        <exclusion>
          <groupId>javax.jms</groupId>
          <artifactId>jms</artifactId>
        </exclusion>
        <exclusion>
          <groupId>com.sun.jdmk</groupId>
          <artifactId>jmxtools</artifactId>
        </exclusion>
        <exclusion>
          <groupId>com.sun.jmx</groupId>
          <artifactId>jmxri</artifactId>
        </exclusion>
      </exclusions>
      <scope>runtime</scope>
    </dependency>
    <!-- logging end-->
    <!-- @Inject -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>3.0-alpha-1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <!-- druid dataSource -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.0.0</version>
    </dependency>

    <!--mysql -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>

    <!-- Apache Commons Dependencies -->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-lang3</artifactId>
      <version>3.3.2</version>
    </dependency>

    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.1</version>
    </dependency>

    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-digester3</artifactId>
      <version>3.2</version>
    </dependency>

    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>

    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-exec</artifactId>
      <version>1.2</version>
    </dependency>

    <dependency>
      <groupId>commons-beanutils</groupId>
      <artifactId>commons-beanutils</artifactId>
      <version>1.9.1</version>
    </dependency>

    <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>1.9</version>
    </dependency>
    <!--common end-->
    <dependency>
      <groupId>cglib</groupId>
      <artifactId>cglib</artifactId>
      <version>2.2.2</version>
    </dependency>

    <!--fastjson-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.5</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.1.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.1.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.1.0</version>
    </dependency>

    <!-- junit測試的包-->
    <dependency>
      <groupId>org.hamcrest</groupId>
      <artifactId>hamcrest-core</artifactId>
      <version>1.3</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.hamcrest</groupId>
      <artifactId>hamcrest-library</artifactId>
      <version>1.3</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>


  </dependencies>
<!-- 固定版本1.7-->
  <build>
    <finalName>springdatajpa</finalName>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.7</source>
          <target>1.7</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

（2）.spring配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans  xmlns="http://www.springframework.org/schema/beans"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jpa="http://www.springframework.org/schema/data/jpa"
    xsi:schemaLocation="http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">

    <!--掃描資源文件-->
    <context:property-placeholder location="classpath:database.properties" ignore-unresolvable="true"/>
    <!--Druid數(shù)據(jù)源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <property name="driverClassName" value="${database.driverClassName}"/>
        <property name="url" value="${database.url}" />
        <property name="username" value="${database.username}" />
        <property name="password" value="${database.password}" />
        <!-- 申請連接時(shí)執(zhí)行validationQuery檢測連接是否有效，配置為true會降低性能 -->
        <property name="testOnBorrow" value="false" />
        <property name="testOnReturn" value="false" />
        <!-- 申請連接的時(shí)候檢測 -->
        <property name="testWhileIdle" value="false" />
        <!-- 配置間隔多久才進(jìn)行一次檢測，檢測需要關(guān)閉的空閑連接，單位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="1800000" />
        <!-- 配置一個(gè)連接在池中最小生存的時(shí)間，單位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="1800000" />
        <property name="defaultAutoCommit" value="false" />

    </bean>


    <!-- 指定事務(wù)管理器，JPA使用JpaTransactionManager事務(wù)管理器實(shí)現(xiàn). -->
    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>

    <!-- 指定JPA實(shí)現(xiàn) -->
    <bean id="jpaVendorAdapter"
        class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
        <property name="showSql" value="false" />
    </bean>

    <!-- 適用于所有環(huán)境的FactoryBean，能全面控制EntityManagerFactory配置,如指定Spring定義的DataSource等等. -->
    <bean id="entityManagerFactory"
        class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <!-- 指定持久化單元名字，即JPA配置文件中指定的 -->
        <property name="persistenceUnitName" value="com.ima" />
        <!-- 見上 -->
        <property name="jpaVendorAdapter" ref="jpaVendorAdapter" />
        <!-- 見上 -->
        <property name="dataSource" ref="dataSource" />
    </bean>

<!-- 映射jpa接口-->
    <jpa:repositories base-package="com.ima.repository" />

    <!-- 開啟事務(wù)管理注解 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>


</beans>

（3）.springMVC的配置：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop" xmlns:mvc="http://www.springframework.org/schema/mvc"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">


    <!-- 開啟SpringMVC注解 -->
    <mvc:annotation-driven />

    <!-- 只掃描Controller 注解 -->
    <context:component-scan base-package="com.ima.controller" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
        <context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.ControllerAdvice" />
    </context:component-scan>


    <!-- 定義視圖解析器 -->
    <bean id="resourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
        <property name="contentType" value="text/html;charset=UTF-8"/>
    </bean>
    <!-- 用于返回json格式 -->
    <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>application/x-www-form-urlencoded;charset=UTF-8</value>
            </list>
        </property>
    </bean>

    <!--上傳文件配置-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="defaultEncoding" value="utf-8"/>
        <property name="maxUploadSize" value="10485760"/>
        <property name="maxInMemorySize" value="40960"/>
    </bean>


    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <!--字符串編碼轉(zhuǎn)換-->
            <bean id="stringHttpMessageConverter" class="org.springframework.http.converter.StringHttpMessageConverter">
                <constructor-arg value="UTF-8"/>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>
</beans>

（4）.數(shù)據(jù)源的配置：

database.url=jdbc:mysql://127.0.0.1:3306/aidou?useUnicode=true&characterEncoding=utf8
database.username=root
database.password=751197996
database.driverClassName=com.mysql.jdbc.Driver

（5）.log4j的日志配置（見源碼）

（6）.JPA的配置包，指定持久化單元：

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    version="2.0" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
    <persistence-unit name="com.ima" transaction-type="RESOURCE_LOCAL">

        <!--ENABLE_SELECTIVE[(默認(rèn)和推薦值):實(shí)體不緩存,除非明確標(biāo)記為可緩存的。] DISABLE_SELECTIVE[實(shí)體緩存,除非明確標(biāo)記為不緩存] NONE[無緩存] ALL[全部緩存]-->
        <shared-cache-mode>ENABLE_SELECTIVE</shared-cache-mode>
        <properties>
            <!-- 使用MySQL方言 -->
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>

            <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver" />
            <property name="hibernate.connection.url" value="jdbc:mysql:///aidou" />
            <property name="hibernate.connection.username" value="root" />
            <property name="hibernate.connection.password" value="751197996" />

            <property name="hibernate.connection.charSet" value="UTF-8" />
            <!-- 自動(dòng)輸出schema創(chuàng)建DDL語句 -->
            <property name="hibernate.hbm2ddl.auto" value="update" />
            <!-- 顯示SQL語句 -->
            <property name="hibernate.show_sql" value="true" />
            <!-- 在顯示SQL語句時(shí)格式化語句 -->
            <property name="hibernate.format_sql" value="true" />
            <property name="hibernate.use_sql_comments" value="true" />

             <!--org.hibernate.cache.EhCacheRegionFactory -->
            <!-- Enable Batching -->
            <property name="hibernate.jdbc.batch_size" value="20" />
            <property name="hibernate.default_batch_fetch_size" value="10" />

            <!-- Hibernate二級緩存相關(guān)配置 -->
            <!-- 開啟二級緩存 -->
            <property name="hibernate.cache.use_second_level_cache" value="true" />
            <!-- 打開Hibernate查詢緩存 -->
            <property name="hibernate.cache.use_query_cache" value="true" />
            <!-- 配置緩存提供者 -->
            <property name="hibernate.cache.region.factory_class" value="org.hibernate.cache.ehcache.EhCacheRegionFactory" />
            <property name="hibernate.generate_statistics" value="true" />
            
        </properties>
    </persistence-unit>
</persistence>

（7）.web.xml配置

<!DOCTYPE web-app PUBLIC
        "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
        "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="
            http://java.sun.com/xml/ns/javaee
            http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">
  <display-name>Archetype Created Web Application</display-name>
  <!-- Spring 配置 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:META-INF/spring/spring-jpa.xml</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- log4j 系統(tǒng)日志-->
  <context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>classpath:META-INF/log4j.properties</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
  </listener>

  <!-- 使用spring Encoding,設(shè)置為UTF-8 -->
  <filter>
    <filter-name>Set Character Encoding</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>Set Character Encoding</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- Spring MVC 啟動(dòng)配置 -->
  <servlet>
    <servlet-name>appServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:META-INF/springmvc/spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>appServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <filter>
    <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
    <filter-class>org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter</filter-class>
    <init-param>
      <!-- 指定org.springframework.orm.jpa.LocalEntityManagerFactoryBean在spring配置文件中的名稱,默認(rèn)值為entityManagerFactory
          如果LocalEntityManagerFactoryBean在spring中的名稱不是entityManagerFactory,該參數(shù)一定要指定,否則會出現(xiàn)找不到entityManagerFactory的例外 -->
      <param-name>entityManagerFactoryBeanName</param-name>
      <param-value>entityManagerFactory</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>Spring OpenEntityManagerInViewFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>




  <!-- Druid,監(jiān)控?cái)?shù)據(jù)庫,以及WEB訪問連接信息 -->
  <!--根據(jù)配置中的url-pattern來訪問內(nèi)置監(jiān)控頁面，如果是上面的配置，內(nèi)置監(jiān)控頁面的首頁是/druid/index.html-->
  <filter>
    <filter-name>DruidWebStatFilter</filter-name>
    <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>
    <init-param>
      <param-name>exclusions</param-name>
      <param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value>
    </init-param>
    <init-param>
      <param-name>sessionStatMaxCount</param-name>
      <param-value>1000</param-value>
    </init-param>
    <init-param>
      <param-name>sessionStatEnable</param-name>
      <param-value>false</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>DruidWebStatFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <servlet>
    <servlet-name>DruidStatView</servlet-name>
    <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
    <init-param>
      <!-- 允許清空統(tǒng)計(jì)數(shù)據(jù) -->
      <param-name>resetEnable</param-name>
      <param-value>true</param-value>
    </init-param>
    <init-param>
      <!-- 用戶名 -->
      <param-name>loginUsername</param-name>
      <param-value>druid</param-value>
    </init-param>
    <init-param>
      <!-- 密碼 -->
      <param-name>loginPassword</param-name>
      <param-value>druid</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>DruidStatView</servlet-name>
    <url-pattern>/druid/*</url-pattern>
  </servlet-mapping>
</web-app>

這樣就完成了工程的配置了?。?！

二、簡單業(yè)務(wù)邏輯測試框架

簡單的bean：（為了偷懶就用JPA自動(dòng)建表了，不過后面會給出sql，而且JPA自動(dòng)建表有坑?。。?/h4>

//積分變化記錄
@Entity
@Table(name = "i_dou_change")
public class IDouChange {
    private Long id;
    //積分變化的類型，拉黑或者在線或者充值
    private String changeType;
    private Date createTime;
    //積分變化數(shù)
    private Integer iDouCount;
    //積分變化者
    private User user;


    public IDouChange() {
    }

    @Id
    @GeneratedValue
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }


    @Column(name = "change_type")
    public String getChangeType() {
        return changeType;
    }

    public void setChangeType(String changeType) {
        this.changeType = changeType;
    }

    @Temporal(TemporalType.TIMESTAMP)
    @Column(name = "create_time",nullable=true,columnDefinition="timestamp default current_timestamp")
    public Date getCreateTime() {
        return createTime;
    }

    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }

    @Column(name = "i_dou_count")
    public Integer getiDouCount() {
        return iDouCount;
    }

    public void setiDouCount(Integer iDouCount) {
        this.iDouCount = iDouCount;
    }
//簡單的多對一
    @JoinColumn(name="user_id")
    @ManyToOne(fetch= FetchType.LAZY)
    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }
}

對應(yīng)的repository接口dao

@Repository
public interface AiDouChangeRepository extends JpaRepository<IDouChange, Long> {
    
}

對應(yīng)的service

@Service
public class AiDouService {
    @Autowired
    private AiDouChangeRepository aiDouChangeRepository;
    public void save(IDouChange iDouChange){
        aiDouChangeRepository.save(iDouChange);
    }
 
}

寫個(gè)測試的controller

@RestController
@RequestMapping("/user")
public class UserController {
    @Autowired
    private UserService userService;
    @Autowired
    private AiDouService aiDouService;


    //test：
    @RequestMapping(value = "/test", method = {RequestMethod.GET, RequestMethod.POST}, produces = "text/html;charset=UTF-8")
    //測試嘛
    public String test(String type, Integer iDouCount )  {
        DTO dto = new DTO();
        IDouChange iDouChange = new IDouChange();
        iDouChange.setChangeType(type);
        iDouChange.setiDouCount(iDouCount);
        aiDouService.save(iDouChange);
        if (iDouChange == null) {
            dto.code = "-1";
            dto.msg = "Have bean registered";
            return JSON.toJSONString(dto);
        } else {
            return JSON.toJSONString(iDouChange);
        }
    }
}

然后？？直接部署呀??！對應(yīng)傳參，測試成功咯?。?！

這里寫圖片描述

一對多沒實(shí)現(xiàn)關(guān)聯(lián)，傻逼的插入就是這樣的啦

這里寫圖片描述

三、項(xiàng)目配置注意點(diǎn)：

這里寫圖片描述

這里寫圖片描述

還有就是在web.xml中映射好spring文件以及springMVC文件

四、快速開發(fā)上手技巧：

（1）在一般項(xiàng)目時(shí)，使用這個(gè)框架Spring Data JPA+Spring+SpringMVC+Maven，快速映射dao層即可編寫業(yè)務(wù)

（2）接口文檔工具，swagger+postman，讓前端移動(dòng)端更快速接入

（3）數(shù)據(jù)庫最好還是新建好導(dǎo)入，再用IDEA的persistence導(dǎo)入，這樣的話，編碼問題就不會出現(xiàn)太多。用IDEA的persistence導(dǎo)入姿勢

（4）雖然不建議用jpa自動(dòng)建表，因?yàn)橛芯幋a問題，不懂的人，就尷尬了，要搞很久，這個(gè)系列的第三篇博客會講解怎么解決這個(gè)的編碼問題。

源碼下載：J2EE項(xiàng)目系列（三）--Spring Data JPA+Spring+SpringMVC+Maven快速開發(fā)（1）項(xiàng)目架構(gòu)

好了，J2EE項(xiàng)目系列（三）--Spring Data JPA+Spring+SpringMVC+Maven快速開發(fā)（1）項(xiàng)目架構(gòu)講完了。本博客是這個(gè)系列的第一篇，所以先講下項(xiàng)目架構(gòu)。另外，這個(gè)系列還有一些我在外包項(xiàng)目過程中做的優(yōu)化，七牛云，云旺IM等使用，以及解決一些小bug等等技巧，我會盡快出完給大家，分享經(jīng)驗(yàn)給大家。歡迎在下面指出錯(cuò)誤，共同學(xué)習(xí)?。∧愕狞c(diǎn)贊是對我最好的支持??！

更多內(nèi)容，可以訪問JackFrost的博客