Spring+Spring MVC+Mybatis 框架整合开发（半注解半配置文件）
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2023-11-06 14:47:10
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：
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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>
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>
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>
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>
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&useunicode=true&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>
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>
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>
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;
}
}
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();
}
}
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;
}
}
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 +
'}';
}
}
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);
}
}
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);
}
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");
}
}
}
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);
}
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 + '\'' +
'}';
}
}