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>4.0.0modelVersion>
<groupId>edu.nfgroupId>
<artifactId>conformityartifactId>
<version>1.0-SNAPSHOTversion>
<modules>
<module>ch01module>
<module>ch02module>
<module>ch03module>
<module>ch04module>
<module>ch05module>
modules>
<packaging>pompackaging>
<properties>
<project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
<java.version>1.8java.version>
<maven.compiler.source>1.8maven.compiler.source>
<maven.compiler.target>1.8maven.compiler.target>
<maven.compiler.compilerVersion>1.8maven.compiler.compilerVersion>
<spring.version>5.1.1.RELEASEspring.version>
<junit.version>4.12junit.version>
<druid.version>1.1.10druid.version>
<mysql.version>5.1.47mysql.version>
<mybatis.version>3.4.6mybatis.version>
<mybatis.spring.version>1.3.2mybatis.spring.version>
<pagehelper.version>5.1.2pagehelper.version>
<aspect.version>1.9.1aspect.version>
<servlet.version>4.0.1servlet.version>
<jackson.version>2.9.6jackson.version>
<slf4j.version>1.7.25slf4j.version>
properties>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>${servlet.version}version>
<scope>providedscope>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>${jackson.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-txartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>${mybatis.version}version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>${mybatis.spring.version}version>
dependency>
<dependency>
<groupId>com.github.pagehelpergroupId>
<artifactId>pagehelperartifactId>
<version>${pagehelper.version}version>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjweaverartifactId>
<version>${aspect.version}version>
dependency>
dependencies>
dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.slf4jgroupId>
<artifactId>slf4j-log4j12artifactId>
<version>${slf4j.version}version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>${junit.version}version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>${druid.version}version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<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>conformityartifactId>
<groupId>edu.nfgroupId>
<version>1.0-SNAPSHOTversion>
parent>
<modelVersion>4.0.0modelVersion>
<artifactId>ch04artifactId>
<packaging>warpackaging>
<dependencies>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
dependency>
<dependency>
<groupId>com.github.pagehelpergroupId>
<artifactId>pagehelperartifactId>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-txartifactId>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjweaverartifactId>
dependency>
dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.pluginsgroupId>
<artifactId>maven-war-pluginartifactId>
<version>2.2version>
<configuration>
<warSourceDirectory>webwarSourceDirectory>
<webXml>web\WEB-INF\web.xmlwebXml>
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">
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:applicationContext.xmlparam-value>
context-param>
<filter>
<filter-name>EncodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>UTF-8param-value>
init-param>
<init-param>
<param-name>forceEncodingparam-name>
<param-value>trueparam-value>
init-param>
filter>
<filter-mapping>
<filter-name>EncodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<filter>
<filter-name>DruidWebStatFilterfilter-name>
<filter-class>com.alibaba.druid.support.http.WebStatFilterfilter-class>
<init-param>
<param-name>exclusionsparam-name>
<param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*param-value>
init-param>
filter>
<filter-mapping>
<filter-name>DruidWebStatFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<servlet>
<servlet-name>DruidStatViewservlet-name>
<servlet-class>com.alibaba.druid.support.http.StatViewServletservlet-class>
<init-param>
<param-name>loginUsernameparam-name>
<param-value>rootparam-value>
init-param>
<init-param>
<param-name>loginPasswordparam-name>
<param-value>rootparam-value>
init-param>
servlet>
<servlet-mapping>
<servlet-name>DruidStatViewservlet-name>
<url-pattern>/druid/*url-pattern>
servlet-mapping>
<servlet>
<servlet-name>dispatcherservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:dispatcher-servlet.xmlparam-value>
init-param>
servlet>
<servlet-mapping>
<servlet-name>dispatcherservlet-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">
<context:component-scan base-package="edu.nf.ch04.controller"/>
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<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">
<context:component-scan base-package="edu.nf.ch04">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
context:component-scan>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<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"/>
<property name="filters" value="stat"/>
<property name="maxActive" value="200"/>
<property name="initialSize" value="5"/>
<property name="minIdle" value="5"/>
<property name="maxWait" value="60000"/>
<property name="timeBetweenEvictionRunsMillis" value="60000"/>
<property name="minEvictableIdleTimeMillis" value="300000"/>
<property name="testWhileIdle" value="true"/>
<property name="testOnBorrow" value="false"/>
<property name="testOnReturn" value="false"/>
<property name="poolPreparedStatements" value="false"/>
<property name="validationQuery" value="select 1"/>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="typeAliasesPackage" value="edu.nf.ch04.entity"/>
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
<property name="plugins">
<bean class="com.github.pagehelper.PageInterceptor">
<property name="properties">
<props>
<prop key="helperDialect">mysqlprop>
<prop key="supportMethodsArguments">trueprop>
props>
property>
bean>
property>
bean>
<mybatis:scan base-package="edu.nf.ch04.dao"/>
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
bean>
<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>
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%d{yyyy-MM-dd HH:mm:ss} %-5p] [%t] %l - %m%n" />
layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="levelMin" value="debug" />
<param name="levelMax" value="error" />
<param name="AcceptOnMatch" value="true" />
filter>
appender>
<root>
<priority value ="debug"/>
<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){ Listlist = 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 */ ListlistClassInfo(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 ListlistClassInfo(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 */ ListlistClassInfo(@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 + '\'' + '}'; } }