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使用maven搭建一個簡單的SSM框架

       學習了ssm框架後,一直想要自己親自搭建一個,最近嘗試了一下,效果還行,算是一個微型的ssm框架吧。介紹一下,我使用的IDE是idea。

       首先,建立一個maven的web工程,如下:

        然後點選next,新增groupId,artifactId和version,這個隨便起不過groupId表示你的包名,artifactId表示你的專案名,如下:

        然後一路next,這裡要注意一下,可能有的小夥伴下載maven專案奇慢無比,這是由於如果你沒新增任何配置的話,你的maven依賴預設是從中央倉庫下載的,而中央倉庫在國外,所以慢是可以理解的,那麼,有什麼可以解決的呢?有,那就是在你的"settings.xml"檔案中新增阿里巴巴的映象即可:如下:

  <mirror>
        <id>alimaven</id>
        <name>aliyun maven</name>
        <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
        <mirrorOf>central</mirrorOf>        
   </mirror>

建立好的maven目錄結構如下:

但是我們需要把它配置成標準的maven專案機構,如下:

這裡,我們還需要將java標記為原始檔,resouces標記為配置檔案,如下所示:

然後在pom.xml檔案中引入相關的spring的依賴,如下:

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
    <spring.version>5.0.3.RELEASE</spring.version>
    <mybatis.version>3.4.4</mybatis.version>
</properties>

  <dependencies>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>
    <!-- 第一部分:Spring 配置-->
    <!-- Spring core -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- Spring DAO -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- Spring mvc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- 第二部分:Servlet web -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.4</version>
    </dependency>
    <!-- 第三部分:資料庫和mybatis -->
    <!-- 資料庫 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.38</version>
    </dependency>
    <!-- 資料庫連線池 -->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>
    <!-- MyBatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <!-- mybatis-spring整合包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.1</version>
    </dependency>
    <!-- 第四部分:日誌 -->
    <!-- 實現slf4j介面並整合 -->
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.1.1</version>
    </dependency>

  </dependencies>

然後在resources配置中建立如下xml檔案:

這裡的applicationContext-dataSource.xml檔案中新增和資料庫相關的配置資訊,如下:

<?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"
       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/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">


    <!-- 配置資料庫相關引數properties的屬性:${url} -->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    
    <!-- 資料庫連線池 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="maxPoolSize" value="${c3p0.maxPoolSize}"/>
        <property name="minPoolSize" value="${c3p0.minPoolSize}"/>
        <property name="autoCommitOnClose" value="${c3p0.autoCommitOnClose}"/>
        <property name="checkoutTimeout" value="${c3p0.checkoutTimeout}"/>
        <property name="acquireRetryAttempts" value="${c3p0.acquireRetryAttempts}"/>
    </bean>

    <!-- 配置SqlSessionFactory物件 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入資料庫連線池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 掃描model包 使用別名 -->
        <property name="typeAliasesPackage" value="com.Jevin.domain"/>
        <!-- 掃描sql配置檔案:mapper需要的xml檔案 -->
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
        <property name="configurationProperties">
            <props>
                <prop key="mapUnderscoreToCamelCase">true</prop>
            </props>
        </property>
    </bean>

    <!-- 配置掃描Dao介面包,動態實現Dao介面,注入到spring容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 給出需要掃描Dao介面包 -->
        <property name="basePackage" value="com.Jevin.dao"/>
    </bean>

    <!-- 配置事務管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入資料庫連線池 -->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 配置基於註解的宣告式事務 -->
    <tx:annotation-driven transaction-manager="transactionManager"></tx:annotation-driven>


</beans>

 那麼,就需要配置連線資料庫的配置了,我們放在jdbc.properties中,如下:

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/bjpowernode?useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456
#最大連線數
c3p0.maxPoolSize=30000
#最小連線數
c3p0.minPoolSize=10
#關閉連線後不自動commit
c3p0.autoCommitOnClose=false
#獲取連線超時時間
c3p0.checkoutTimeout=10000
#當獲取連線失敗重試次數
c3p0.acquireRetryAttempts=2

其中,這裡:

是你自己的資料庫庫名,自己根據自己的情況酌情而定。

然後在applicationContext-springMVC,xml中配置有關springMVC相關的配置資訊:

<?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">


    <!-- 配置註解驅動 -->
    <mvc:annotation-driven />

    <!-- 配置檢視解析器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/" />
        <property name="suffix" value=".jsp" />
    </bean>

</beans>

 再然後,在applicationContext.xml總配置檔案中引入其他的配置檔案:

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

    <!-- 載入系統配置檔案 -->
    <context:property-placeholder location="classpath:*.properties" />
    <!-- 掃描註解 -->
    <context:component-scan base-package="com.Jevin" />

    <!-- 匯入資料相關配置 -->
    <import resource="applicationContext-dataSource.xml" />
    <import resource="applicationContext-springMVC.xml" />


</beans>

 

 其中mapper中的emp.xml中是寫sql的如下:

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

<!-- 設定為IUserDao介面方法提供sql語句配置 -->
<mapper namespace="com.Jevin.dao.EmpDao">

    <resultMap id="BaseResultMap" type="com.Jevin.domain.Emp">
        <id column="empno" jdbcType="INTEGER" property="empno" />
        <result column="ename" jdbcType="VARCHAR" property="ename" />
        <result column="job" jdbcType="VARCHAR" property="job" />
        <result column="mgr" jdbcType="INTEGER" property="mgr" />
        <result column="hiredate" jdbcType="DATE" property="hiredate" />
        <result column="sal" jdbcType="DOUBLE" property="sal" />
        <result column="comm" jdbcType="DOUBLE" property="comm" />
        <result column="deptno" jdbcType="INTEGER" property="deptno" />
    </resultMap>

    <select id="getEmp" resultMap="BaseResultMap">
        select * from emp;
    </select>

</mapper>

然後在web.xml檔案中配置一些servlet和其他資訊:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <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>
      <!--  <param-value>classpath:bean/applicationContext.xml</param-value>-->
    </init-param>
    <load-on-startup>1</load-on-startup>
    <async-supported>true</async-supported>
  </servlet>
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext*.xml</param-value>

  </context-param>


  <!-- 編碼過濾器 -->
  <filter>
    <filter-name>encodingFilter</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>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- spring監聽器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!-- 防止spring記憶體溢位監聽器,比如quartz -->
  <listener>
    <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
  </listener>
  <session-config>
    <session-timeout>30</session-timeout>
  </session-config>
</web-app>

再然後是原始檔目錄如下:

至於原始檔中的內容如下:

首先是domain層:

package com.Jevin.domain;

import java.util.Date;

public class Emp {

    private Integer empno;
    private String ename;
    private String job;
    private Integer mgr;
    private Date hiredate;
    private Double sal;
    private Double comm;
    private Integer deptno;

    public Emp(){};

    public Emp(Integer empno, String ename, String job, Integer mgr, Date hiredate, Double sal, Double comm, Integer deptno) {
        this.empno = empno;
        this.ename = ename;
        this.job = job;
        this.mgr = mgr;
        this.hiredate = hiredate;
        this.sal = sal;
        this.comm = comm;
        this.deptno = deptno;
    }

    public Integer getEmpno() {
        return empno;
    }

    public void setEmpno(Integer empno) {
        this.empno = empno;
    }

    public String getEname() {
        return ename;
    }

    public void setEname(String ename) {
        this.ename = ename;
    }

    public String getJob() {
        return job;
    }

    public void setJob(String job) {
        this.job = job;
    }

    public Integer getMgr() {
        return mgr;
    }

    public void setMgr(Integer mgr) {
        this.mgr = mgr;
    }

    public Date getHiredate() {
        return hiredate;
    }

    public void setHiredate(Date hiredate) {
        this.hiredate = hiredate;
    }

    public Double getSal() {
        return sal;
    }

    public void setSal(Double sal) {
        this.sal = sal;
    }

    public Double getComm() {
        return comm;
    }

    public void setComm(Double comm) {
        this.comm = comm;
    }

    public Integer getDeptno() {
        return deptno;
    }

    public void setDeptno(Integer deptno) {
        this.deptno = deptno;
    }

    @Override
    public String toString() {
        return "Emp{" +
                "empno=" + empno +
                ", ename='" + ename + '\'' +
                ", job='" + job + '\'' +
                ", mgr=" + mgr +
                ", hiredate=" + hiredate +
                ", sal=" + sal +
                ", comm=" + comm +
                ", deptno=" + deptno +
                '}';
    }
}

然後是dao層:

package com.Jevin.dao;

import com.Jevin.domain.Emp;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository
public interface EmpDao {
    public List<Emp> getEmp();
}

然後是service層:

package com.Jevin.service;

import com.Jevin.domain.Emp;

import java.util.List;

public interface EmpService {
    public List<Emp> getEmp();
}
package com.Jevin.service.inpl;

import com.Jevin.dao.EmpDao;
import com.Jevin.domain.Emp;
import com.Jevin.service.EmpService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class EmpServiceImpl implements EmpService {

    @Autowired
    private EmpDao empDao;

    @Override
    public List<Emp> getEmp() {
        return empDao.getEmp();
    }
}

 最後第controller層:

package com.Jevin.controller;

import com.Jevin.service.EmpService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/emp")
public class EmpController {

    @Autowired
    private EmpService empService;

    @RequestMapping(value="/query")
    public Object getEmp(){
        return empService.getEmp();
    }
}

好了,至此程式碼已經都寫完了,接下來配置tomcat容器:

 

 這裡,還需要將你的專案打包成jar包,或者是war包,儘管idea已經替你打好了,但是你還需要學會自己打包:如下:

 

 然後就是將專案部署到tomcat中去:

 好了,至此專案已經結束,可以啟動tomcat跑專案了:

瀏覽器中有如上的json資訊,表明配置成功了!