一、首先我们先创建一个Maven项目
把我们需要的包先准备好
1.打开pom.xml文件引入依赖,以下是整个pom.xml文件
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
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.zking</groupId>
<artifactId>untitled12</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>untitled12 Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<!--junit+servlet-->
<junit.version>4.12</junit.version>
<servlet.version>4.0.1</servlet.version>
<!--spring-->
<spring.version>5.3.18</spring.version>
<!--mybatis-->
<mybatis.version>3.4.5</mybatis.version>
<!--mysql-->
<mysql.version>8.0.30</mysql.version>
<!--pagehelper-->
<pagehelper.version>5.1.2</pagehelper.version>
<!--mybatis-spring-->
<mybatis.spring.version>1.3.1</mybatis.spring.version>
<!--dbcp2-->
<commons.dbcp2.version>2.1.1</commons.dbcp2.version>
<commons.pool2.version>2.4.3</commons.pool2.version>
<!--log4j2-->
<log4j2.version>2.9.1</log4j2.version>
<slf4j.version>1.7.7</slf4j.version>
<log4j2.disruptor.version>3.2.0</log4j2.disruptor.version>
<!--lombok-->
<lombok.version>1.18.12</lombok.version>
</properties>
<dependencies>
<!--junit+servlet-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet.version}</version>
</dependency>
<!--spring-->
<!-- ********************** spring依赖 ********************** -->
<!--1)spring核心依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<!--spring ioc依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<!--spring 扩展依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!--2)spring dao层依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<!--3)aop相关依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<!--4)spring web相关依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<!--5) spring test相关依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!--mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--pagehelper-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!--mybatis与spring集成依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!-- druid阿里的数据库连接池 -->
<dependency>
<artifactId>druid</artifactId>
<groupId>com.alibaba</groupId>
<version>1.1.10</version>
</dependency>
<!--dbcp2连接池-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>${commons.dbcp2.version}</version>
<exclusions>
<exclusion>
<artifactId>commons-pool2</artifactId>
<groupId>org.apache.commons</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>${commons.pool2.version}</version>
</dependency>
<!--日志 -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- slf4j日志包 -->
<dependency>
<artifactId>slf4j-log4j12</artifactId>
<groupId>org.slf4j</groupId>
<version>1.7.25</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>untitled12</finalName>
<plugins>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
</dependencies>
<configuration>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
</build>
</project>
2.引入依赖之后咱们导入需要的xml文件
1.generatorConfig.xml文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
<!-- 引入配置文件 -->
<properties resource="jdbc.properties"/>
<!--指定数据库jdbc驱动jar包的位置-->
<classPathEntry location="D:\config\res\mysql\mysql-connector-java\8.0.30\mysql-connector-java-8.0.30.jar"/>
<!-- 一个数据库一个context -->
<context id="infoGuardian">
<!-- 注释 -->
<commentGenerator>
<property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
<property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
</commentGenerator>
<!-- jdbc连接 -->
<jdbcConnection driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>
<!-- 类型转换 -->
<javaTypeResolver>
<!-- 是否使用bigDecimal, false可自动转化以下类型(Long, Integer, Short, etc.) -->
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 01 指定javaBean生成的位置 -->
<!-- targetPackage:指定生成的model生成所在的包名 -->
<!-- targetProject:指定在该项目下所在的路径 -->
<javaModelGenerator targetPackage="com.zking.ssm.spring.model"
targetProject="src/main/java">
<!-- 是否允许子包,即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
<!-- 是否对model添加构造函数 -->
<property name="constructorBased" value="true"/>
<!-- 是否针对string类型的字段在set的时候进行trim调用 -->
<property name="trimStrings" value="false"/>
<!-- 建立的Model对象是否 不可改变 即生成的Model对象不会有 setter方法,只有构造方法 -->
<property name="immutable" value="false"/>
</javaModelGenerator>
<!-- 02 指定sql映射文件生成的位置 -->
<sqlMapGenerator targetPackage="com.zking.ssm.spring.mapper"
targetProject="src/main/resources">
<!-- 是否允许子包,即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!-- 03 生成XxxMapper接口 -->
<!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 -->
<!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 -->
<!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 -->
<javaClientGenerator targetPackage="com.zking.ssm.spring.mapper"
targetProject="src/main/java" type="XMLMAPPER">
<!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model, true:com.oop.eksp.user.model.[schemaName] -->
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>
<!-- 配置表信息 -->
<!-- schema即为数据库名 -->
<!-- tableName为对应的数据库表 -->
<!-- domainObjectName是要生成的实体类 -->
<!-- enable*ByExample是否生成 example类 -->
<table schema="" tableName="t_student" domainObjectName="Student"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
<!-- <!– 忽略列,不生成bean 字段 –>-->
<!-- <!– <ignoreColumn column="FRED" /> –>-->
<!-- <!– 指定列的java数据类型 –>-->
<!-- <!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>-->
</table>
</context>
</generatorConfiguration>
这是生成那些我们的实体类和mapper层还有对应mapper层的配置文件
2.jdbc.properties配置文件
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/y1?useUnicode=true&characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC
jdbc.username=root
jdbc.password=root123
3.log4j.properties配置文件
log4j.rootLogger=DEBUG, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p %d %C: %m%n
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=INFO
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG
把以上配置好就可以进行生成那些代码了
然后打开Maven这个控制器
然后点击mybatis-generator运行他就行了,然后就会自动给你生成这些代码了
二、开始Spring集成MyBatis
1、首先我们先创建一个MyBatis.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 控制台查看拼接好的sql, settings标签要放在前面,顺序错了这个配置文件会报错-->
<settings>
<setting name="logImpl" value="STDOUT_LOGGING"/>
</settings>
<!-- 批量定义别名,包下面的类批量取别名,别名就是类名(首字母小写) -->
<typeAliases>
<package name="com.zking.ssm"/>
</typeAliases>
</configuration>
2、之后就是创建Spring文件这个文件是Spring帮我们管理MyBatis
可能有些东西不同但是这个文件是必备的
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns="http://www.springframework.org/schema/beans"
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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
<!--<context:component-scan base-package="com.tjise.bean"/>-->
<context:component-scan base-package="com.zking.ssm"/>
<!-- 加载数据库连接信息的属性文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 开启事务管理 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<constructor-arg ref="dataSource"/>
</bean>
<!-- 配置Druid数据源的Bean -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>
<!-- 配置SessionFactory的Bean -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--配置数据源-->
<property name="dataSource" ref="dataSource"/>
<!--配置mapper的路径-->
<property name="mapperLocations" value="classpath:com/zking/ssm/springmappermapper"/>
</bean>
<!-- <tx:advice id="TxAdvice" transaction-manager="transactionManager">-->
<!-- <tx:attributes>-->
<!-- <tx:method name="Insert*" isolation="REPEATABLE_READ" propagation="REQUIRED"/>-->
<!-- <tx:method name="Update*" isolation="REPEATABLE_READ" propagation="REQUIRED"/>-->
<!-- <tx:method name="Delete*" isolation="REPEATABLE_READ" propagation="REQUIRED"/>-->
<!-- <tx:method name="Query*" isolation="REPEATABLE_READ" propagation="SUPPORTS"/>-->
<!-- </tx:attributes>-->
<!-- </tx:advice>-->
<!--5.开启注解式事务-->
<!-- <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">-->
<!-- <property name="dataSource" ref="dataSource"/>-->
<!-- </bean>-->
<!--6.开启动态代理-->
<aop:aspectj-autoproxy/>
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
接下来就是我们写service来测试这个集成好没有,切记记得改jdbc.properties文件里面的参数和驱动程序要和你本机相同
1.创建IStudent借口
public interface IStudent {
List<Student> listPager(Student student, PageBean pageBean);
List<Student> selectByPager(@Param("student") Student student, PageBean pageBean);
}
2.实现这个借口
@Service
public class StudentImpl implements IStudent {
//依赖注入,不写这个会报空值异常
@Autowired
private StudentMapper studentMapper;
@Override
public List<Student> listPager(Student student, PageBean pageBean) {
return studentMapper.listPager(student, pageBean);
}
@Paging //这是一个分页的注解
@Override
public List<Student> selectByPager(Student student, PageBean pageBean) {
return studentMapper.list(student, pageBean);
}
}
然后就可以去test 目录底下编写测试类了
测试类的编写
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath*:Spring.xml")
public class IStudentTest{
@Autowired
private IStudent iStudent;
@Test
public void Pager() {
Student student = new Student();
student.setSname("");
List<Student> students = iStudent.selectByPager(student, new PageBean());
students.forEach(t -> System.out.println(t));
}
}
然后就是去编写咱们的aop切面编程了
首先我们要一个分页对象
PageBean.java
package com.zking.ssm.spring.util;
import lombok.*;
import lombok.experimental.Accessors;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
//val : 最终局部变量
//@NonNull : 让你不在担忧并且爱上NullPointerException(可以在参数的类型前面加上注解)
//@CleanUp : 自动资源管理:不用再在finally中添加资源的close方法
//@Setter/@Getter : 自动生成set和get方法
//@ToString : 自动生成toString方法
//@EqualsAndHashcode : 从对象的字段中生成hashCode和equals的实现
//@NoArgsConstructor/@RequiredArgsConstructor/@AllArgsConstructor
//自动生成构造方法
//@Data : 自动生成set/get方法,toString方法,equals方法,hashCode方法,不带参数的构造方法
//@Value : 用于注解final类
//@Builder : 产生复杂的构建器api类
//@SneakyThrows : 异常处理(谨慎使用)
//@Synchronized : 同步方法安全的转化
//@Getter(lazy=true) :
//@Log : 支持各种logger对象,使用时用对应的注解,如:@Log4j
@AllArgsConstructor
@NoArgsConstructor
@ToString
@EqualsAndHashCode
@Accessors(chain = true)
@Data
public class PageBean {
private Integer total; //数据库的总条数
private Integer page = 1; //当前页数
private Integer row = 5; //当前显示的条数
private boolean pagination = true; //是否需要分页
private String url;
private Map<String, String[]> ms;
public PageBean(HttpServletRequest req) {
String page = req.getParameter("page");
String row = req.getParameter("row");
if (page != null && page.length() > 0) {
this.setPage(Integer.parseInt(page));
}
if (row != null && row.length() > 0) {
this.setRow(Integer.parseInt(row));
}
String pagination = req.getParameter("pagination");
if (pagination != null && pagination.equals("false")) {
this.setPagination(false);
}
this.ms = req.getParameterMap();
}
public Integer start() {
return (page - 1) * row;
}
public Integer max() {
return total % row == 0 ? total / row : total / row + 1;
}
public Integer next() {
return Math.min(page + 1, max());
}
public Integer prev() {
return Math.max(page - 1, 1);
}
}
然后我们要编写aop切面编程了
PageAspect.java
package com.zking.ssm.spring.aop;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.zking.ssm.spring.util.PageBean;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
@Aspect
public class PageAspect {
@Around("execution(* *..*Service.*Pager(..))")
public Object invoke(ProceedingJoinPoint joinPoint) throws Throwable {
//获取目标方法的执行参数
Object[] args = joinPoint.getArgs();
//定义PageBean对象
PageBean pageBean = null;
for (Object param : args) {
//判断执行参数中是否有PageBean对象
if (param instanceof PageBean) {
pageBean = (PageBean) param;
break;
}
}
//判断是否分页
if (pageBean != null && pageBean.isPagination()) {
PageHelper.startPage(pageBean.getPage(), pageBean.getRow());
}
Object returnValue = joinPoint.proceed(args);
if (pageBean != null && pageBean.isPagination()) {
if (null != returnValue && returnValue instanceof List) {
List list = (List) returnValue;
PageInfo pageInfo = new PageInfo(list);
pageBean.setTotal((int) pageInfo.getTotal());
}
}
return returnValue;
}
}
@Around("execution(* *..*Service.*Pager(..))")的意思是环绕通知然后里面的是必须是打了@Service注解的类才能识别到,*Pager就是以Pager结尾的前面所以的名字都可以识别到,然后(..)是方法参数不限制
编写好之后
就可以去测试了
但是这样会有识别不到的风险
所以咱们使用注解进行分页
package com.zking.ssm.spring.aop;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.zking.ssm.spring.util.PageBean;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
@Aspect
public class PagerAop {
//环绕通知 自定义注解 分辨是否调用
@Around("@annotation(com.zking.ssm.spring.interfaces.Paging)")
public Object around(ProceedingJoinPoint joinPoint) throws Throwable {
//获取目标方法的所有参数
Object[] args = joinPoint.getArgs();
PageBean pag = null;
for (Object arg : args) {
if (arg instanceof PageBean) {
pag = (PageBean) arg;
if (pag != null && pag.isPagination()) {
PageHelper.startPage(pag.getPage(), pag.getRow());
}
}
}
Object proceed = joinPoint.proceed();
if (pag != null && pag.isPagination()) {
PageInfo info = new PageInfo((List) proceed);
pag.setTotal((int) info.getTotal());
}
return proceed;
}
}
然后就是写@Paging
//编译加载
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.PARAMETER})
public @interface Paging {
}
然后就可以在你要实现的类中打上注解就行了
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