SSM框架整合（已测试通过）

小鱼儿 2022-05-28 02:16 217阅读 0赞

SSM框架整合步骤（Spring+SpringMVC+MyBatis）  
基本参见：[https://blog.csdn.net/qq\_38844326/article/details/75360557][https_blog.csdn.net_qq_38844326_article_details_75360557]此博客进行搭建，下面只对搭建中出现问题的地方进行说明，其他地方直接看参考的博客中进行即可。

1.  Spring与Mybatis整合  
    对Spring与Mybatis进行整合，同时进行测试。  
    1.1 新建jdbc.properties文件（文件编码修改为utf-8），这里注意数据库用户名的key不要使用username，在与数据库连接时可能会出现错误。  
    jdbc.properties

driver=com.mysql.jdbc.Driver
    url=jdbc:mysql://127.0.0.1:3306/spider
    user=root
    password=123456
    #定义初始连接数
    initialSize=10
    #定义最大连接数
    maxActive=20
    #定义最大空闲
    maxIdle=20
    #定义最小空闲
    minIdle=1
    #定义最长等待时间 
    maxWait=60000

1.2 新建spring-mybatis.xml配置文件  
这里获取数据库配置的时候，如果使用的是$\{username\},建立连接的时候可能会使用操作系统的账号，当时这个问题找了一会，提醒一下，避免以后遇到相同问题。  
spring-mybatis.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: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-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">  
          
        <context:component-scan base-package="com.puliang123.qq" />  
          
        <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">  
            <property name="location" value="classpath:jdbc.properties" />  
        </bean>  
        <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">  
            <property name="driverClassName" value="${driver}" />  
            <property name="url" value="${url}" />  
            <property name="username" value="${user}" />  
            <property name="password" value="${password}" />  
              
            <property name="initialSize" value="${initialSize}"></property>  
              
            <property name="maxActive" value="${maxActive}"></property>  
              
            <property name="maxIdle" value="${maxIdle}"></property>  
              
            <property name="minIdle" value="${minIdle}"></property>  
              
            <property name="maxWait" value="${maxWait}"></property>  
        </bean>  
    
          
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
            <property name="dataSource" ref="dataSource" />  
              
            <property name="mapperLocations" value="classpath:com/puliang123/qq/spider/mapping/*.xml"></property>  
        </bean>  
    
          
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
            <property name="basePackage" value="com.puliang123.qq.spider.dao" />  
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>  
        </bean>  
    
          
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
            <property name="dataSource" ref="dataSource" />  
        </bean>  
    </beans>

1.  配置中Spring的扫描包等路径需要改成自己项目中的路径
2.  Mybatis中的\*Mapper.xml文件中的类型，涉及到自己项目中的POJO,都需要使用全路径。附上例子：

<?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.puliang123.qq.spider.dao.IUserDao">
        <resultMap id="BaseResultMap" type="com.puliang123.qq.spider.pojo.IUser">
            
            <id column="id" property="id" jdbcType="INTEGER" />
            <result column="user_name" property="userName" jdbcType="VARCHAR" />
            <result column="password" property="password" jdbcType="VARCHAR" />
            <result column="age" property="age" jdbcType="INTEGER" />
        </resultMap>
        <sql id="Base_Column_List">
            
            id, user_name, password, age
        </sql>
        <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer">
            
            select
            <include refid="Base_Column_List" />
            from user_t
            where id = #{id,jdbcType=INTEGER}
        </select>
        <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer">
            
            delete from user_t
            where id = #{id,jdbcType=INTEGER}
        </delete>
        <insert id="insert" parameterType="com.puliang123.qq.spider.pojo.IUser">
            
            insert into user_t (id, user_name, password,
            age)
            values (#{id,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR},
            #{password,jdbcType=VARCHAR},
            #{age,jdbcType=INTEGER})
        </insert>
        <insert id="insertSelective" parameterType="com.puliang123.qq.spider.pojo.IUser">
            
            insert into user_t
            <trim prefix="(" suffix=")" suffixOverrides=",">
                <if test="id != null">
                    id,
                </if>
                <if test="userName != null">
                    user_name,
                </if>
                <if test="password != null">
                    password,
                </if>
                <if test="age != null">
                    age,
                </if>
            </trim>
            <trim prefix="values (" suffix=")" suffixOverrides=",">
                <if test="id != null">
                    #{id,jdbcType=INTEGER},
                </if>
                <if test="userName != null">
                    #{userName,jdbcType=VARCHAR},
                </if>
                <if test="password != null">
                    #{password,jdbcType=VARCHAR},
                </if>
                <if test="age != null">
                    #{age,jdbcType=INTEGER},
                </if>
            </trim>
        </insert>
        <update id="updateByPrimaryKeySelective" parameterType="com.puliang123.qq.spider.pojo.IUser">
            
            update user_t
            <set>
                <if test="userName != null">
                    user_name = #{userName,jdbcType=VARCHAR},
                </if>
                <if test="password != null">
                    password = #{password,jdbcType=VARCHAR},
                </if>
                <if test="age != null">
                    age = #{age,jdbcType=INTEGER},
                </if>
            </set>
            where id = #{id,jdbcType=INTEGER}
        </update>
        <update id="updateByPrimaryKey" parameterType="com.puliang123.qq.spider.pojo.IUser">
            
            update user_t
            set user_name = #{userName,jdbcType=VARCHAR},
            password = #{password,jdbcType=VARCHAR},
            age = #{age,jdbcType=INTEGER}
            where id = #{id,jdbcType=INTEGER}
        </update>
    </mapper>

4 个人整和xxl-job到项目中时，启动时读取的配置文件为空。解决方法如下：  
将xxl-job-executor.properties文件的加载方式改为：

<context:property-placeholder location="classpath*:xxl-job-executor.properties" ignore-unresolvable="true"  />

![这里写图片描述][70]

[https_blog.csdn.net_qq_38844326_article_details_75360557]: https://blog.csdn.net/qq_38844326/article/details/75360557
[70]: /images/20220528/dbc87fbf71a44ca6abfa978fd839a650.png