利用Maven整合SSM框架

其他 2018-05-04 15:43:27 阅读次数: 2

我们知道手动管理jar包是非常痛苦的，而maven就可以帮助我们解决这个问题

这里我们就在eclipse上用搭建一个maven风格的ssm框架

关于maven的入门知识可参考：http://how2j.cn/k/maven/maven-maven-eclpise-ssm-create/1395.html#nowhere   很贴心的一个网站，十分适合零基础的人学习练手

 项目最后的目录结构如下所示，跟普通的动态web项目还是有点区别的，maven最核心的是它的pom.xml文件，里面配置了项目所需要的所有jar包，可以很方便的进行管理

 1.创建maven工程

 右键→new→other→搜索“maven”→Maven Project

点击next后，选择webapp模板，快速建立一个maven风格的web工程

            

 2.一些设置

 

我们创建了一个test的工程，发现它是有报错的，而且src目录下没有存放源码的目录，因此要进行一些设置

 首先，右键→Build path→libraries

edit JRE，选择workspace的jre，应用之后源码的目录就出来了

 

 在pom.xml中配置jar包的依赖，然后update一下project（右键工程→maven→update project），工程上的报错就都没有了

<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.zaj</groupId>
  <artifactId>test</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>test Maven Webapp</name>
  <url>http://maven.apache.org</url>
 <properties>
    <spring.version>4.1.3.RELEASE</spring.version>
    <pagehelper.version>5.1.2-beta</pagehelper.version>
    <mysql.version>5.1.6</mysql.version>
    <mybatis.spring.version>1.2.3</mybatis.spring.version>
    <mybatis.version>3.1.1</mybatis.version>
    <junit.version>4.12</junit.version>
    <jstl.version>1.2</jstl.version>
    <jsqlparser.version>1.0</jsqlparser.version>
    <jackson.version>1.2.7</jackson.version>
    <servlet-api.version>3.1.0</servlet-api.version>
    <druid.version>1.0.18</druid.version>
    <log4j.version>1.2.16</log4j.version>
    <commons-logging.version>1.2</commons-logging.version>
    <commons-fileupload.version>1.2.1</commons-fileupload.version>
    <commons-io.version>1.3.2</commons-io.version>
    <commons-lang.version>2.6</commons-lang.version>
    <aopalliance.version>1.0</aopalliance.version>
    <mybatis-generator.version>1.3.5</mybatis-generator.version>
  </properties>
  <dependencies>
<dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>${junit.version}</version>
    </dependency>
 
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
     <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>${commons-io.version}</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>
 
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>
 
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>${druid.version}</version>
    </dependency>
 
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
 
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</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-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
 
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
 
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- JSP相关 -->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>${jstl.version}</version>
    </dependency>
 
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>
 
    <!-- pageHelper -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>${pagehelper.version}</version>
    </dependency>
 
    <!--jsqlparser-->
    <dependency>
      <groupId>com.github.jsqlparser</groupId>
      <artifactId>jsqlparser</artifactId>
      <version>${jsqlparser.version}</version>
    </dependency>
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>
 
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>${commons-logging.version}</version>
    </dependency>
 
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>${commons-fileupload.version}</version>
    </dependency>
 

    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>${commons-lang.version}</version>
    </dependency>
 
    <dependency>
      <groupId>aopalliance</groupId>
      <artifactId>aopalliance</artifactId>
      <version>${aopalliance.version}</version>
    </dependency>
 
    <dependency>
      <groupId>org.mybatis.generator</groupId>
      <artifactId>mybatis-generator-core</artifactId>
      <version>${mybatis-generator.version}</version>
    </dependency>
  </dependencies>
<build>
    <finalName>${project.artifactId}</finalName>
    <plugins>
      <!-- 资源文件拷贝插件 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-resources-plugin</artifactId>
        <version>2.7</version>
        <configuration>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
      <!-- java编译插件 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.2</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
    </plugins>
    <pluginManagement>
      <plugins>
        <!-- 配置Tomcat插件 -->
        <plugin>
          <groupId>org.apache.tomcat.maven</groupId>
          <artifactId>tomcat7-maven-plugin</artifactId>
          <version>2.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
 
    <resources>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
          <include>**/*.tld</include>
        </includes>
        <filtering>false</filtering>
      </resource>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>
 
  </build>
</project>

在mysql中创建一个表

use how2java;
   
CREATE TABLE category_ (
  id int(11) NOT NULL AUTO_INCREMENT,
  name varchar(30) ,
  PRIMARY KEY (id)
) DEFAULT CHARSET=UTF8;
 
 
    
insert into category_ values(null,"category1");
insert into category_ values(null,"category2");
insert into category_ values(null,"category3");
insert into category_ values(null,"category4");
insert into category_ values(null,"category5");

 3.持久层

 持久层负责从数据库中读写数据，采用mybatis，相关的配置在 http://www.cnblogs.com/zaj666/p/8988713.html 中都有提到

这里其实只要把代码复制过来就可以了

package的结构看最上面

持久层首先需要一个pojo

package com.how2java.pojo;
 
public class Category {
    private int id;
    private String name;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    @Override
    public String toString() {
        return "Category [id=" + id + ", name=" + name + "]";
    }
     
}

 映射器包括一个mapper接口和一个xml配置文件

package com.how2java.mapper;
  
import java.util.List;
 
import com.how2java.pojo.Category;
  
public interface CategoryMapper {
  
    public void add(Category category); 
        
    public void delete(int id); 
        
    public Category get(int id); 
      
    public void update(Category category);  
        
    public List<Category> list();
     
    public int count(); 
     
}

<?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">
 
    <mapper namespace="com.how2java.mapper.CategoryMapper">
        <insert id="add" parameterType="Category" >
            insert into category_ ( name ) values (#{name})   
        </insert>
         
        <delete id="delete" parameterType="Category" >
            delete from category_ where id= #{id}  
        </delete>
         
        <select id="get" parameterType="_int" resultType="Category">
            select * from   category_  where id= #{id}   
        </select>
 
        <update id="update" parameterType="Category" >
            update category_ set name=#{name} where id=#{id}   
        </update>
        <select id="list" resultType="Category">
            select * from   category_     
        </select>    
    </mapper>

最后是mybatis的配置文件，因为整合spring，所以都放在了applicationContext.xml中，主要配置数据源、会话工厂、mapper扫描器

这个配置文件同样也是spring的配置文件，所以里面也有@service的注解扫描

<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
     http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
     http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
     http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
     http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
     
     <!-- 扫描service -->
   <context:annotation-config />
    <context:component-scan base-package="com.how2java.service" />
    
     <!-- 配置数据源 -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
      <property name="driverClassName"> 
          <value>com.mysql.jdbc.Driver</value> 
      </property> 
      <property name="url"> 
          <value>jdbc:mysql://localhost:3306/how2java?characterEncoding=UTF-8</value>  
      </property> 
      <property name="username"> 
          <value>root</value> 
      </property> 
      <property name="password"> 
          <value>root</value> 
      </property>    
    </bean>
     
     <!-- 配置会话工厂 -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="typeAliasesPackage" value="com.how2java.pojo" />
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:com/how2java/mapper/*.xml"/>
    </bean>
 
     <!-- 配置Mapper扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.how2java.mapper"/>
    </bean>
     
</beans>

 4.业务层

 业务层的配置文件就是上面的applicationContext.xml，就是配置了@Service的扫描路径，把带有注解的类注册到IoC容器中

那我们这里就要把业务层的类创建好

首先要一个接口

package com.how2java.service;
 
import java.util.List;
 
import com.how2java.pojo.Category;
 
public interface CategoryService {
 
    List<Category> list();
 
}

然后是它的实现类

package com.how2java.service.impl;
 
import java.util.List;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
import com.how2java.mapper.CategoryMapper;
import com.how2java.pojo.Category;
import com.how2java.service.CategoryService;
 
@Service
public class CategoryServiceImpl  implements CategoryService{
    @Autowired
    CategoryMapper categoryMapper;
     
    public List<Category> list(){
        return categoryMapper.list();
    };
 
}

5.表现层

表现层框架是springmvc，首先要配置web.xml

最核心的是dispatcherservlet，负责分发请求

还要配置一个spring监听，把appliactionContext.xml配置文件的ioC容器启动起来

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:web="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_2_5.xsd" version="2.5">
     
    <!-- spring的配置文件 监听Spring-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
     
    <!-- spring mvc核心：分发servlet -->
    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- spring mvc的配置文件 -->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springMVC.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
     
</web-app>

然后创建一个controller

package com.how2java.controller;
 
import java.util.List;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
 
import com.how2java.pojo.Category;
import com.how2java.service.CategoryService;
 

@Controller
@RequestMapping("")
public class CategoryController {
    @Autowired
    CategoryService categoryService;
 
    @RequestMapping("listCategory")
    public ModelAndView listCategory(){
        ModelAndView mav = new ModelAndView();
        List<Category> cs= categoryService.list();
         
 
        mav.addObject("cs", cs);
   
        mav.setViewName("listCategory");
        return mav;
    }
 
}

最后把jsp复制到WEB-INF下就好了

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8" import="java.util.*"%>
  
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
  
<table align='center' border='1' cellspacing='0'>
    <tr>
        <td>id</td>
        <td>name</td>
    </tr>
    <c:forEach items="${cs}" var="c" varStatus="st">
        <tr>
            <td>${c.id}</td>
            <td>${c.name}</td>
               
        </tr>
    </c:forEach>
</table>

将项目部署到Tomcat上启动（右键→run as→run on server），

在浏览器上输入http://localhost:8080/ssm-maven/，就可以看到Hello World！ 成功！

到这里一个maven风格的ssm工程就搭建完毕了，当一个请求过来时的流程是这样的：（图片来源how2java.cn）

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