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Spring+Spring MVC+Mybatis 框架整合开发（半注解半配置文件）

2018年11月24日 | 移动技术网IT编程 | 我要评论

项目结构：

（代码里面都有注释）

一、在pom文件中依赖jar包

因为我这里分了模块，所以有父子级的共两个pom文件

父级：

<?xml version="1.0" encoding="utf-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelversion>4.0.0</modelversion>

    <groupid>edu.nf</groupid>
    <artifactid>conformity</artifactid>
    <version>1.0-snapshot</version>
    <modules>
        <module>ch01</module>
        <module>ch02</module>
        <module>ch03</module>
        <module>ch04</module>
        <module>ch05</module>
    </modules>
    <packaging>pom</packaging>

    <properties>
        <project.build.sourceencoding>utf-8</project.build.sourceencoding>
        <java.version>1.8</java.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.compilerversion>1.8</maven.compiler.compilerversion>
        <!-- 版本管理 -->
        <spring.version>5.1.1.release</spring.version>
        <junit.version>4.12</junit.version>
        <druid.version>1.1.10</druid.version>
        <mysql.version>5.1.47</mysql.version>
        <mybatis.version>3.4.6</mybatis.version>
        <mybatis.spring.version>1.3.2</mybatis.spring.version>
        <pagehelper.version>5.1.2</pagehelper.version>
        <aspect.version>1.9.1</aspect.version>
        <servlet.version>4.0.1</servlet.version>
        <jackson.version>2.9.6</jackson.version>
        <slf4j.version>1.7.25</slf4j.version>
    </properties>

    <!-- 依赖管理,子模块按需依赖 -->
    <dependencymanagement>
        <dependencies>
            <!-- javax.servlet-api -->
            <dependency>
                <groupid>javax.servlet</groupid>
                <artifactid>javax.servlet-api</artifactid>
                <version>${servlet.version}</version>
                <scope>provided</scope>
            </dependency>
            <!-- spring-web -->
            <dependency>
                <groupid>org.springframework</groupid>
                <artifactid>spring-web</artifactid>
                <version>${spring.version}</version>
            </dependency>
            <!-- spring-webmvc -->
            <dependency>
                <groupid>org.springframework</groupid>
                <artifactid>spring-webmvc</artifactid>
                <version>${spring.version}</version>
            </dependency>
            <!-- jackson-databind -->
            <dependency>
                <groupid>com.fasterxml.jackson.core</groupid>
                <artifactid>jackson-databind</artifactid>
                <version>${jackson.version}</version>
            </dependency>
            <!-- spring-jdbc -->
            <dependency>
                <groupid>org.springframework</groupid>
                <artifactid>spring-jdbc</artifactid>
                <version>${spring.version}</version>
            </dependency>
            <!-- spring-tx -->
            <dependency>
                <groupid>org.springframework</groupid>
                <artifactid>spring-tx</artifactid>
                <version>${spring.version}</version>
            </dependency>
            <!-- mybatis-->
            <dependency>
                <groupid>org.mybatis</groupid>
                <artifactid>mybatis</artifactid>
                <version>${mybatis.version}</version>
            </dependency>
            <!-- mybatis整合spring插件 -->
            <dependency>
                <groupid>org.mybatis</groupid>
                <artifactid>mybatis-spring</artifactid>
                <version>${mybatis.spring.version}</version>
            </dependency>
            <!-- pagehelper分页插件-->
            <dependency>
                <groupid>com.github.pagehelper</groupid>
                <artifactid>pagehelper</artifactid>
                <version>${pagehelper.version}</version>
            </dependency>
            <!-- aspectjweaver-->
            <dependency>
                <groupid>org.aspectj</groupid>
                <artifactid>aspectjweaver</artifactid>
                <version>${aspect.version}</version>
            </dependency>
        </dependencies>
    </dependencymanagement>

    <!-- 公共依赖 -->
    <dependencies>
        <!-- spring-context -->
        <dependency>
            <groupid>org.springframework</groupid>
            <artifactid>spring-context</artifactid>
            <version>${spring.version}</version>
        </dependency>
        <!-- slf4j-log4j12 -->
        <dependency>
            <groupid>org.slf4j</groupid>
            <artifactid>slf4j-log4j12</artifactid>
            <version>${slf4j.version}</version>
        </dependency>
        <!-- junit -->
        <dependency>
            <groupid>junit</groupid>
            <artifactid>junit</artifactid>
            <version>${junit.version}</version>
        </dependency>
        <!-- druid -->
        <dependency>
            <groupid>com.alibaba</groupid>
            <artifactid>druid</artifactid>
            <version>${druid.version}</version>
        </dependency>
        <dependency>
            <groupid>mysql</groupid>
            <artifactid>mysql-connector-java</artifactid>
            <version>${mysql.version}</version>
        </dependency>
    </dependencies>
</project>

view code

子级：

<?xml version="1.0" encoding="utf-8"?>
<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/xsd/maven-4.0.0.xsd">
    <parent>
        <artifactid>conformity</artifactid>
        <groupid>edu.nf</groupid>
        <version>1.0-snapshot</version>
    </parent>
    <modelversion>4.0.0</modelversion>
    <artifactid>ch04</artifactid>
    <packaging>war</packaging>

    <dependencies>
        <!-- javax.servlet-api -->
        <dependency>
            <groupid>javax.servlet</groupid>
            <artifactid>javax.servlet-api</artifactid>
        </dependency>
        <!-- spring-webmvc -->
        <dependency>
            <groupid>org.springframework</groupid>
            <artifactid>spring-webmvc</artifactid>
        </dependency>
        <!-- jackson -->
        <dependency>
            <groupid>com.fasterxml.jackson.core</groupid>
            <artifactid>jackson-databind</artifactid>
        </dependency>
        <!-- mybatis -->
        <dependency>
            <groupid>org.mybatis</groupid>
            <artifactid>mybatis</artifactid>
        </dependency>
        <!-- mybatis整合spring插件 -->
        <dependency>
            <groupid>org.mybatis</groupid>
            <artifactid>mybatis-spring</artifactid>
        </dependency>
        <!-- 分页插件-->
        <dependency>
            <groupid>com.github.pagehelper</groupid>
            <artifactid>pagehelper</artifactid>
        </dependency>
        <!-- spring-jdbc-->
        <dependency>
            <groupid>org.springframework</groupid>
            <artifactid>spring-jdbc</artifactid>
        </dependency>
        <!-- spring-tx-->
        <dependency>
            <groupid>org.springframework</groupid>
            <artifactid>spring-tx</artifactid>
        </dependency>
        <!-- aspectjweaver -->
        <dependency>
            <groupid>org.aspectj</groupid>
            <artifactid>aspectjweaver</artifactid>
        </dependency>
    </dependencies>

    <!-- war插件 -->
    <build>
        <plugins>
            <plugin>
                <groupid>org.apache.maven.plugins</groupid>
                <artifactid>maven-war-plugin</artifactid>
                <version>2.2</version>
                <configuration>
                    <warsourcedirectory>web</warsourcedirectory>
                    <!-- 指定web.xml路径 -->
                    <webxml>web\web-inf\web.xml</webxml>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

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ssm所需jar包：

二、配置web.xml文件

<?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_4_0.xsd"
         version="4.0">

    <!-- 当初始化不同的配置文件时，spring会初始化不同的容器对象，
     也就是会产生父子容器，子容器可以共享父容器的内容，但父容器是不能
     访问子容器的对象-->

    <!-- 配置监听器去初始化applicationcontext.xml -->
    <listener>
        <listener-class>org.springframework.web.context.contextloaderlistener</listener-class>
    </listener>
    <!-- 配置监听器的初始化参数-->
    <context-param>
        <param-name>contextconfiglocation</param-name>
        <param-value>classpath:applicationcontext.xml</param-value>
    </context-param>
    
    <!-- 配置spring提供的字符编码过滤器 -->
    <filter>
        <filter-name>encodingfilter</filter-name>
        <filter-class>org.springframework.web.filter.characterencodingfilter</filter-class>
        <!-- 指定编码 -->
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
        <!-- 让response的编码和request保持一致-->
        <init-param>
            <param-name>forceencoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingfilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- webstatfilter用于采集监控的数据-->
    <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>
    </filter>
    <filter-mapping>
        <filter-name>druidwebstatfilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 配置statviewservlet，用于启用监控视图 -->
    <servlet>
        <servlet-name>druidstatview</servlet-name>
        <servlet-class>com.alibaba.druid.support.http.statviewservlet</servlet-class>
        <init-param>
            <!-- 用户名 -->
            <param-name>loginusername</param-name>
            <param-value>root</param-value>
        </init-param>
        <init-param>
            <!-- 密码 -->
            <param-name>loginpassword</param-name>
            <param-value>root</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>druidstatview</servlet-name>
        <url-pattern>/druid/*</url-pattern>
    </servlet-mapping>

    <!-- 配置核心控制器 -->
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.dispatcherservlet</servlet-class>
        <!-- 初始化mvc配置文件 -->
        <init-param>
            <param-name>contextconfiglocation</param-name>
            <param-value>classpath:dispatcher-servlet.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

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三、配置dispatcher-servlet.xml

创建springmvc核心配置文件

<?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">

    <!-- 扫描相应的控制器组件,不包含service以及dao -->
    <context:component-scan base-package="edu.nf.ch04.controller"/>

    <!-- 启用mvc注解驱动-->
    <mvc:annotation-driven/>

    <!-- 静态资源处理-->
    <mvc:default-servlet-handler/>

    <!-- 配置视图解析器 -->
    <bean class="org.springframework.web.servlet.view.internalresourceviewresolver">
        <property name="prefix" value="/web-inf/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

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四、配置applicationcontext.xml

创建spring核心配置文件

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

    <!-- 启用注解并扫描 -->
    <context:component-scan base-package="edu.nf.ch04">
        <!-- 排除控制层组件,也就是排除带有@controller注解的类 -->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.controller"/>
    </context:component-scan>

    <!-- 配置数据源连接池 -->
    <bean id="datasource" class="com.alibaba.druid.pool.druiddatasource" init-method="init" destroy-method="close">
        <!-- 数据库连接属性 -->
        <property name="url" value="jdbc:mysql://localhost:3306/homework?usessl=true&amp;useunicode=true&amp;characterencoding=utf-8"/>
        <property name="driverclassname" value="com.mysql.jdbc.driver"/>
        <property name="username" value="root"/>
        <property name="password" value="root"/>
        <!-- 启用系统监控过滤器 -->
        <property name="filters" value="stat"/>
        <!-- 最大连接池数量 -->
        <property name="maxactive" value="200"/>
        <!-- 初始化时建立物理连接的个数-->
        <property name="initialsize" value="5"/>
        <!-- 最小连接池数量-->
        <property name="minidle" value="5"/>
        <!-- 获取连接时最大等待时间，单位毫秒-->
        <property name="maxwait" value="60000"/>
        <!-- 销毁线程会检测连接的间隔时间，（单位毫秒）
        如果连接空闲时间大于等于minevictableidletimemillis则关闭物理连接-->
        <property name="timebetweenevictionrunsmillis" value="60000"/>
        <!-- 连接保持空闲而不被驱逐的最小时间 -->
        <property name="minevictableidletimemillis" value="300000"/>
        <!--申请连接的时候检测，如果空闲时间大于timebetweenevictionrunsmillis，
        执行validationquery检测连接是否有效-->
        <property name="testwhileidle" value="true"/>
        <!-- 申请连接时执行validationquery检测连接是否有效 -->
        <property name="testonborrow" value="false"/>
        <!-- 归还连接时执行validationquery检测连接是否有效-->
        <property name="testonreturn" value="false"/>
        <!-- 是否缓存preparedstatement, mysql建议关闭-->
        <property name="poolpreparedstatements" value="false"/>
        <!-- 伪sql，用于检查连接是否可用 -->
        <property name="validationquery" value="select 1"/>
    </bean>

    <!-- 配置sqlsessionfactory,将mybatis的sqlsessionfactory交给spring容器管理 -->
    <bean id="sqlsessionfactory" class="org.mybatis.spring.sqlsessionfactorybean">
        <!-- 注入druid数据源 -->
        <property name="datasource" ref="datasource"/>
        <!-- 给实体包下的类定义默认别名-->
        <property name="typealiasespackage" value="edu.nf.ch04.entity"/>
        <!-- 指定mapper映射配置文件的目录-->
        <property name="mapperlocations" value="classpath:mapper/*.xml"/>
        <!-- 配置分页插件-->
        <property name="plugins">
            <!-- 配置一个bean，指定分页插件的拦截器-->
            <bean class="com.github.pagehelper.pageinterceptor">
                <property name="properties">
                    <!--配置拦截器的参数属性 -->
                    <props>
                        <!-- 指定数据库方言 -->
                        <prop key="helperdialect">mysql</prop>
                        <!-- 分页参数使用注解支持-->
                        <prop key="supportmethodsarguments">true</prop>
                    </props>
                </property>
            </bean>
        </property>
    </bean>

    <!-- 指定扫描的dao接口的包,利用动态代理在运行时生成dao的实现类 -->
    <mybatis:scan base-package="edu.nf.ch04.dao"/>

    <!-- 装配datasource的事务管理器-->
    <bean id="txmanager" class="org.springframework.jdbc.datasource.datasourcetransactionmanager">
        <!-- 需要注入一个datasource -->
        <property name="datasource" ref="datasource"/>
    </bean>

    <!-- 启用事务注解驱动,transaction-manager引用上面定义的事务管理器的id，
    如果id的名称就叫做transactionmanager，那么就不需要指定这个属性，因为是默认值-->
    <tx:annotation-driven transaction-manager="txmanager"/>
</beans>

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mapper：classdao.xml 数据库执行语句

<?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="edu.nf.ch04.dao.classdao">

    <resultmap id="classmap" type="classinfo">
        <id property="id" column="c_id"/>
        <result property="classname" column="c_name"/>
    </resultmap>

    <select id="listclassinfo" resultmap="classmap">
        select * from class_info
    </select>

    <select id="getclassbyid" parametertype="integer" resultmap="classmap">
        select * from class_info where c_id = #{id}
    </select>

    <insert id="saveclassinfo" parametertype="classinfo">
        insert into class_info(c_name) values(#{classname});
    </insert>

    <update id="updateclassinfo" parametertype="classinfo">
        update class_info set c_name = #{classname}
    </update>

</mapper>

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五、log4j日志的配置：

<?xml version="1.0" encoding="utf-8"?>
<!doctype log4j:configuration system "log4j.dtd">
<log4j:configuration>

    <!-- 指定日志的输出方式，consoleappender表示输出到控制台 -->
    <appender name="console" class="org.apache.log4j.consoleappender">
        <!-- 使用自定义布局-->
        <layout class="org.apache.log4j.patternlayout">
            <!-- 自定义布局转换参数说明
                 %d 日期格式
                 %p 输出级别
                 %t 输出当先执行线程名
                 %m 输出当先运行的方法名
                 %l 输出日志事件的发生位置，包括类名、发生的线程，以及在代码中的行数
                 %c 输出当前的类名
                 %m 输出日志内容
                 %n 换行-->
            <param name="conversionpattern" value="[%d{yyyy-mm-dd hh:mm:ss} %-5p] [%t] %l - %m%n" />
        </layout>
        <!-- 过滤输出范围-->
        <filter class="org.apache.log4j.varia.levelrangefilter">
            <param name="levelmin" value="debug" />
            <param name="levelmax" value="error" />
            <param name="acceptonmatch" value="true" />
        </filter>
    </appender>

    <!-- 配置log4j的root，默认所有日志都将以root的配置进行输出-->
    <root>
        <!-- 指定输出级别，log4j一共分为7个级别，由低到高分为all、debug、info、warn、error、fatal、off
             但官方建议使用debug、info、warn、error这4个级别。通过使用日志级别，可以控制应用程序中相应级别日志信息的输出。
             例如，如果使用了info级别，则应用程序中所有低于info级别的日志信息(如debug)将不会被打印出来。-->
        <priority value ="debug"/>
        <!-- 引用输出方式，ref对应appender的name -->
        <appender-ref ref="console"/>
    </root>

</log4j:configuration>

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六、编写代码

controller

basecontroller：

package edu.nf.ch04.controller;

import edu.nf.ch04.controller.vo.responsevo;

/**
 * @author wangl
 * @date 2018/11/12
 * 父级控制器
 * 封装了给子类调用的成功响应视图的方法
 */
public class basecontroller {

    protected responsevo success(){
        return new responsevo();
    }

    protected responsevo success(object value){
        responsevo vo = new responsevo();
        vo.setvalue(value);
        return vo;
    }

    protected responsevo success(integer code, object value){
        responsevo vo = new responsevo();
        vo.setcode(code);
        vo.setvalue(value);
        return vo;
    }
}

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classcontroller：

package edu.nf.ch04.controller;

import edu.nf.ch04.controller.vo.responsevo;
import edu.nf.ch04.entity.classinfo;
import edu.nf.ch04.servie.classservice;
import org.slf4j.logger;
import org.slf4j.loggerfactory;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.getmapping;
import org.springframework.web.bind.annotation.postmapping;
import org.springframework.web.bind.annotation.responsebody;

import java.util.list;

/**
 * @author wangl
 * @date 2018/11/12
 */
@controller
public class classcontroller extends basecontroller{

    /**
     * 日志对象
     */
    private static final logger logger = loggerfactory.getlogger(classcontroller.class);

    /**
     * 注入对象
     */
    @autowired
    private classservice classservice;

    @getmapping("/listclassinfo")
    @responsebody
    public responsevo listclassinfo(integer pagenum, integer pagesize){
        list<classinfo> list = classservice.listclassinfo(pagenum, pagesize);
        logger.info("查询用户列表: " + list.size());
        return success(list);
    }

    @postmapping("/add")
    public responsevo addclass(classinfo classinfo){
        classservice.saveclassinfo(classinfo);
        return success();
    }
}

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advice（globalexceptionhandler）：异常处理类

package edu.nf.ch04.controller.advice;


import edu.nf.ch04.controller.vo.responsevo;
import edu.nf.ch04.servie.dataaccessexception;
import org.springframework.http.httpstatus;
import org.springframework.web.bind.annotation.controlleradvice;
import org.springframework.web.bind.annotation.exceptionhandler;
import org.springframework.web.bind.annotation.responsebody;

/**
 * @author wangl
 * @date 2018/11/12
 * 定义一个全局的异常处理类（类似一个切面）
 * 这个类中定义的所有方法都是异常处理方法，
 * 也可以理解为是全局的异常通知
 * value属性指定对哪些控制器进行切入拦截
 */
@controlleradvice
public class globalexceptionhandler {

    /**
     * 全局异常处理方法
     * 用于处理参数异常
     * @param e
     * @return
     */
    @exceptionhandler(dataaccessexception.class)
    @responsebody
    public responsevo handledataaccessexception(dataaccessexception e){
        responsevo vo = new responsevo();
        //设置相应状态码以及异常信息
        vo.setcode(httpstatus.internal_server_error.value());
        vo.setmessage(e.getmessage());
        return vo;
    }
}

view code

vo响应视图

package edu.nf.ch04.controller.vo;

import org.springframework.http.httpstatus;

/**
 * @author wangl
 * @date 2018/11/12
 * 响应视图
 */
public class responsevo {

    private integer code = httpstatus.ok.value();

    private string message;

    private object value;

    public integer getcode() {
        return code;
    }

    public void setcode(integer code) {
        this.code = code;
    }

    public string getmessage() {
        return message;
    }

    public void setmessage(string message) {
        this.message = message;
    }

    public object getvalue() {
        return value;
    }

    public void setvalue(object value) {
        this.value = value;
    }

    @override
    public string tostring() {
        return "responsevo{" +
                "code=" + code +
                ", message='" + message + '\'' +
                ", value=" + value +
                '}';
    }
}

view code

service

自定义异常dataaccessexception：

package edu.nf.ch04.servie;

/**
 * @author wangl
 * @date 2018/11/12
 */
public class dataaccessexception extends runtimeexception{

    public dataaccessexception(string message) {
        super(message);
    }

    public dataaccessexception(string message, throwable cause) {
        super(message, cause);
    }

    public dataaccessexception(throwable cause) {
        super(cause);
    }
}

view code

业务层接口classservice

package edu.nf.ch04.servie;

import edu.nf.ch04.entity.classinfo;

import java.util.list;

/**
 * @author wangl
 * @date 2018/11/8
 */
public interface classservice {

    /**
     * 查询班级信息
     * @param pagenum
     * @param pagesize
     * @return
     */
    list<classinfo> listclassinfo(integer pagenum, integer pagesize);

    /**
     * 根据id查询班级信息
     * @param id
     * @return
     */
    classinfo getclassbyid(integer id);

    /**
     * 新建班级信息
     * @param classinfo
     */
    void saveclassinfo(classinfo classinfo);

    /**
     * 修改班级信息
     * @param classinfo
     */
    void updateclassinfo(classinfo classinfo);
}

view code

业务层实现类classserviceimpl

package edu.nf.ch04.servie.impl;

import edu.nf.ch04.dao.classdao;
import edu.nf.ch04.entity.classinfo;
import edu.nf.ch04.servie.classservice;
import edu.nf.ch04.servie.dataaccessexception;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.stereotype.service;
import org.springframework.transaction.annotation.propagation;
import org.springframework.transaction.annotation.transactional;

import java.util.list;

/**
 * @author wangl
 * @date 2018/11/8
 * @transactional 事务注解
 */
@service("classservice")
@transactional(rollbackfor = runtimeexception.class)
public class classserviceimpl implements classservice {

    @autowired
    private classdao classdao;

    @transactional(rollbackfor = runtimeexception.class, propagation = propagation.supports, readonly = true)
    @override
    public list<classinfo> listclassinfo(integer pagenum, integer pagesize) {
        return classdao.listclassinfo(pagenum, pagesize);
    }

    @transactional(rollbackfor = runtimeexception.class, propagation = propagation.supports, readonly = true)
    @override
    public classinfo getclassbyid(integer id) {
        return classdao.getclassbyid(id);
    }

    @override
    public void saveclassinfo(classinfo classinfo) {
        try {
            classdao.saveclassinfo(classinfo);
        } catch (runtimeexception e) {
            e.printstacktrace();
            throw new dataaccessexception("添加失败");
        }
    }

    @override
    public void updateclassinfo(classinfo classinfo) {
        try {
            classdao.updateclassinfo(classinfo);
        } catch (exception e) {
            e.printstacktrace();
            throw new runtimeexception("修改失败");
        }
    }
}

view code

dao（classdao持久层接口）

package edu.nf.ch04.dao;

import edu.nf.ch04.entity.classinfo;
import org.apache.ibatis.annotations.param;
import org.springframework.stereotype.repository;

import java.util.list;

/**
 * @author wangl
 * @date 2018/11/8
 */
@repository
public interface classdao {

    /**
     * 查询班级列表信息
     * @param pagenum
     * @param pagesize
     * @return
     */
    list<classinfo> listclassinfo(@param("pagenum") integer pagenum, @param("pagesize") integer pagesize);

    /**
     * 根据id查询班级信息
     * @param id
     * @return
     */
    classinfo getclassbyid(integer id);

    /**
     * 新建班级信息
     * @param classinfo
     */
    void saveclassinfo(classinfo classinfo);

    /**
     * 修改班级信息
     * @param classinfo
     */
    void updateclassinfo(classinfo classinfo);
}

view code

entity（classinfo 实体类）

package edu.nf.ch04.entity;

/**
 * @author wangl
 * @date 2018/11/8
 */
public class classinfo {

    private integer id;

    private string classname;

    public integer getid() {
        return id;
    }

    public void setid(integer id) {
        this.id = id;
    }

    public string getclassname() {
        return classname;
    }

    public void setclassname(string classname) {
        this.classname = classname;
    }

    @override
    public string tostring() {
        return "classinfo{" +
                "id=" + id +
                ", classname='" + classname + '\'' +
                '}';
    }
}

view code

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