一、Mybatis与spring集成

1、导入pom依赖

1.1 添加spring相关依赖(5.0.2.RELEASE)
spring-core
spring-beans
spring-context
spring-orm
spring-tx
spring-aspects
spring-web

1.2 添加mybatis相关依赖
mybatis核心：mybatis(3.4.5)
Mybatis分页：pagehelper(5.1.2)

1.3 spring整合mybatis(1.3.1)
mybatis-spring

1.4 添加dbcp2连接池
commons-dbcp2(2.1.1)
commons-pool2(2.4.3)

1.5 添加日志配置(2.9.1)
log4j-core
log4j-api
log4j-web

1.6 其他
junit(4.12)
javax.servlet-api(4.0.0)
lombok(1.18.2)

注：使用mybatis-generator插件，pom文件添加支持

?2、利用mybatis逆向工程生成模型层层代码

<?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>org.example</groupId>
  <artifactId>ssm</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>ssm Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</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>
    <maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>

    <!--添加jar包依赖-->
    <!--1.spring 5.0.2.RELEASE相关-->
    <spring.version>5.0.2.RELEASE</spring.version>
    <!--2.mybatis相关-->
    <mybatis.version>3.4.5</mybatis.version>
    <!--mysql-->
    <mysql.version>5.1.44</mysql.version>
    <!--pagehelper分页jar依赖-->
    <pagehelper.version>5.1.2</pagehelper.version>
    <!--mybatis与spring集成jar依赖-->
    <mybatis.spring.version>1.3.1</mybatis.spring.version>
    <!--3.dbcp2连接池相关 druid-->
    <commons.dbcp2.version>2.1.1</commons.dbcp2.version>
    <commons.pool2.version>2.4.3</commons.pool2.version>
    <!--4.log日志相关-->
    <log4j2.version>2.9.1</log4j2.version>
    <!--5.其他-->
    <junit.version>4.12</junit.version>
    <servlet.version>4.0.0</servlet.version>
    <lombok.version>1.18.2</lombok.version>
  </properties>


  <dependencies>
    <!--1.spring相关-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-orm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!--2.mybatis相关-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <!--mysql-->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>
    <!--pagehelper分页插件jar包依赖-->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>${pagehelper.version}</version>
    </dependency>
    <!--mybatis与spring集成jar包依赖-->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>${mybatis.spring.version}</version>
    </dependency>

    <!--3.dbcp2连接池相关-->
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-dbcp2</artifactId>
      <version>${commons.dbcp2.version}</version>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-pool2</artifactId>
      <version>${commons.pool2.version}</version>
    </dependency>

    <!--4.log日志相关依赖-->
    <!--核心log4j2jar包-->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-core</artifactId>
      <version>${log4j2.version}</version>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-api</artifactId>
      <version>${log4j2.version}</version>
    </dependency>
    <!--web工程需要包含log4j-web，非web工程不需要-->
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-web</artifactId>
      <version>${log4j2.version}</version>
    </dependency>

    <!--5.其他-->
    <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>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>${lombok.version}</version>
      <scope>provided</scope>
    </dependency>

  </dependencies>


  <build>
    <finalName>ssm</finalName>
    <resources>
      <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.xml</include>
        </includes>
      </resource>
      <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>jdbc.properties</include>
          <include>*.xml</include>
        </includes>
      </resource>
    </resources>

    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>${maven.compiler.plugin.version}</version>
          <configuration>
            <source>${maven.compiler.source}</source>
            <target>${maven.compiler.target}</target>
            <encoding>${project.build.sourceEncoding}</encoding>
          </configuration>
        </plugin>
        <plugin>
          <groupId>org.mybatis.generator</groupId>
          <artifactId>mybatis-generator-maven-plugin</artifactId>
          <version>1.3.2</version>
          <dependencies>
            <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
            <dependency>
              <groupId>mysql</groupId>
              <artifactId>mysql-connector-java</artifactId>
              <version>${mysql.version}</version>
            </dependency>
          </dependencies>
          <configuration>
            <overwrite>true</overwrite>
          </configuration>
        </plugin>

        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

3、编写配置文件applicationContext-mybatis.xml

3.1 注解式开发
开启注解

注解式开发
注解驱动
context:annotation-config/
用注解方式注入bean，并指定查找范围：com.javaxl.ssm及子子孙孙包
<context:component-scan base-package=“com.javaxl.ssm”/>

3.2 引入外部jdbc配置文件
<context:property-placeholder location=“classpath:jdbc.properties”/>

3.3 配置dbcp2数据库连接池

3.4 spring和mybatis整合

3.5 注解式事物配置
<tx:annotation-driven transaction-manager="transactionManager" />
?

3.6 开启动态代理
aop:aspectj-autoproxy/

3.7 注解式开发
@Repository：将DAO类声明为Bean
@Service：通常作用在业务层
@Constroller：通常作用在控制层，将在Spring MVC中使用
@Component：是一个泛化的概念，仅仅表示spring中的一个组件（Bean），可以作用在任何层次
@Scope：模式声明（singleton|prototype）
@Autowired：将自动在代码上下文与其匹配（默认是类型匹配）的Bean，并自动注入到相应的地方
@Resource：
1）@Resource后面没有任何内容，默认通过name属性去匹配bean，找不到再按type去匹配
2）指定了name或者type则根据指定的类型去匹配bean
3）指定了name和type则根据指定的name和type去匹配bean，任何一个不匹配都将报错

问题：@Autowired和@Resource两个注解的区别：
1）@Autowired默认按照byType方式进行bean匹配，@Resource默认按照byName方式进行bean匹配
2）@Autowired是Spring的注解，@Resource是J2EE的注解，这个看一下导入注解的时候这两个注解的包名就一清二楚了
Spring属于第三方的，J2EE是Java自己的东西，因此，建议使用@Resource注解，以减少代码和Spring之间的耦合。

applicationContext-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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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 http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--1. 注解式开发 -->
    <!-- 注解驱动 -->
    <context:annotation-config/>
    <!-- 用注解方式注入bean，并指定查找范围：com.javaxl.ssm及子子孙孙包-->
    <context:component-scan base-package="com.javaxl.ssm"/>

    <context:property-placeholder location="classpath:jdbc.properties"/>

    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"
          destroy-method="close">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <!--初始连接数-->
        <property name="initialSize" value="10"/>
        <!--最大活动连接数-->
        <property name="maxTotal" value="100"/>
        <!--最大空闲连接数-->
        <property name="maxIdle" value="50"/>
        <!--最小空闲连接数-->
        <property name="minIdle" value="10"/>
        <!--设置为-1时，如果没有可用连接，连接池会一直无限期等待，直到获取到连接为止。-->
        <!--如果设置为N（毫秒），则连接池会等待N毫秒，等待不到，则抛出异常-->
        <property name="maxWaitMillis" value="-1"/>
    </bean>

    <!--4. spring和MyBatis整合 -->
    <!--1) 创建sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定数据源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 自动扫描XxxMapping.xml文件，**任意路径 -->
        <property name="mapperLocations" value="classpath*:com/javaxl/ssm/**/mapper/*.xml"/>
        <!-- 指定别名 -->
        <property name="typeAliasesPackage" value="com/javaxl/ssm/**/model"/>
        <!--配置pagehelper插件-->
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>
                            helperDialect=mysql
                        </value>
                    </property>
                </bean>
            </array>
        </property>
    </bean>

    <!--2) 自动扫描com/javaxl/ssm/**/mapper下的所有XxxMapper接口(其实就是DAO接口)，并实现这些接口，-->
    <!--   即可直接在程序中使用dao接口，不用再获取sqlsession对象-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--basePackage 属性是映射器接口文件的包路径。-->
        <!--你可以使用分号或逗号 作为分隔符设置多于一个的包路径-->
        <property name="basePackage" value="com/javaxl/ssm/**/mapper"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager" />
    <aop:aspectj-autoproxy/>
</beans>

4、Spring Test+junit完美组合

4.1、BookBiz

package com.liaoxin.ssm.biz;

import com.liaoxin.ssm.model.Book;
import com.liaoxin.ssm.model.BookVo;
import com.liaoxin.ssm.util.PageBean;

import java.util.List;
import java.util.Map;

public interface BookBiz {
    public int deleteByPrimaryKey(Integer bid);

    public Book selectByPrimaryKey(Integer bid);

    public List<Book> selectByIn(List bookIds);

    public List<Book> selectBooksLike1(String bname);
    public List<Book> selectBooksLike2(String bname);
    public List<Book> selectBooksLike3(String bname);

    List<Book> list1();
    List<Book> list2();
    List<Book> list3(BookVo vo);
    List<Map> list4();
    Map list5(Map map);

    List<Map> listPager(Map map, PageBean pageBean);

    List<Book> list6(BookVo bookVo);

    List<Book> list7(BookVo bookVo);
}

4.2、BookBizImpl

package com.liaoxin.ssm.biz.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.liaoxin.ssm.biz.BookBiz;
import com.liaoxin.ssm.mapper.BookMapper;
import com.liaoxin.ssm.model.Book;
import com.liaoxin.ssm.model.BookVo;
import com.liaoxin.ssm.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;

@Service
public class BookBizImpl implements BookBiz {
    @Autowired
    private BookMapper bookMapper;

//    alt+insert 快速提供set/get/tostring/构造方法
//    alt+enter 快速构建实现类，填充代码的前半部分 ctrl+1
//    public BookMapper getBookMapper() {
//        return bookMapper;
//    }

//    public void setBookMapper(BookMapper bookMapper) {
//        this.bookMapper = bookMapper;
//    }

    @Override
    public int deleteByPrimaryKey(Integer bid) {
        return bookMapper.deleteByPrimaryKey(bid);
    }

    @Override
    public Book selectByPrimaryKey(Integer bid) {
        return bookMapper.selectByPrimaryKey(bid);
    }

    @Override
    public List<Book> selectByIn(List bookIds) {
        return bookMapper.selectByIn(bookIds);
    }

    @Override
    public List<Book> selectBooksLike1(String bname) {
        return bookMapper.selectBooksLike1(bname);
    }

    @Override
    public List<Book> selectBooksLike2(String bname) {
        return bookMapper.selectBooksLike2(bname);
    }

    @Override
    public List<Book> selectBooksLike3(String bname) {
        return bookMapper.selectBooksLike3(bname);
    }

    @Override
    public List<Book> list1() {
        return bookMapper.list1();
    }

    @Override
    public List<Book> list2() {
        return bookMapper.list2();
    }

    @Override
    public List<Book> list3(BookVo vo) {
        return bookMapper.list3(vo);
    }

    @Override
    public List<Map> list4() {
        return bookMapper.list4();
    }

    @Override
    public Map list5(Map map) {
        return bookMapper.list5(map);
    }

    @Override
    public List<Map> listPager(Map map, PageBean pageBean) {
//        pageHelper分页插件相关的代码
        if(pageBean!=null&&pageBean.isPagination()){
            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
        }
        List<Map> maps = bookMapper.listPager(map);
        if(pageBean!=null&&pageBean.isPagination()){
//            处理查询结果的前提是需要分页，是需要分页的
            PageInfo info = new PageInfo(maps);
            pageBean.setTotal(info.getTotal()+"");
        }
        return maps;
    }

    @Override
    public List<Book> list6(BookVo bookVo) {
        return bookMapper.list6(bookVo);
    }

    @Override
    public List<Book> list7(BookVo bookVo) {
        return bookMapper.list7(bookVo);
    }
}

4.3、BookMapper

package com.liaoxin.ssm.mapper;

import com.liaoxin.ssm.model.Book;
import com.liaoxin.ssm.model.BookVo;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Repository;

import java.util.List;
import java.util.Map;

@Repository
public interface BookMapper {
    int deleteByPrimaryKey(Integer bid);

    int insert(Book record);

    int insertSelective(Book record);

    Book selectByPrimaryKey(Integer bid);

    int updateByPrimaryKeySelective(Book record);

    int updateByPrimaryKey(Book record);

//  通过in关键字进行查询：讲解foreach 标签的使用
//    如果说参数是非实体类(book,Order,....)，那么急的加上注解 @param,bookIds是对应collection属性的
    List<Book> selectByIn(@Param("bookIds") List bookIds);

    List<Book> selectBooksLike1(@Param("bname") String bname);
    List<Book> selectBooksLike2(@Param("bname") String bname);
    List<Book> selectBooksLike3(@Param("bname") String bname);

//    list1 list2的结论是，对于单表查询而言，可以用resultmap/resulttype接收，但是多表必须用resultmap接收
    List<Book> list1();
    List<Book> list2();
//    如果要传入多个查询参数，必须以对象的方式进行传递
//    举例：select * from t_mvc_book where bid in (1,2,3,4,5,6) and bname in ("圣墟","不死不休")
    List<Book> list3(BookVo vo);
//    说明了不管返回1条数据，还是多条数据，都应该用java.util.Map进行接受
//    如果是1条数据，那么返回值是Map
//    如果是多条数据，那么返回值List<Map>
    List<Map> list4();
    Map list5(Map map);

//    利用第三方插件进行分页
    List<Map> listPager(Map map);

    /**
     * 处理特殊字符
     * @param bookVo
     * @return
     */
    List<Book> list6(BookVo bookVo);


    /**
     * 处理特殊字符
     * @param bookVo
     * @return
     */
    List<Book> list7(BookVo bookVo);


}

4.4、BookBizImplTest

package com.liaoxin.ssm;

import com.liaoxin.ssm.biz.BookBiz;
import com.liaoxin.ssm.biz.impl.BookBizImpl;
import com.liaoxin.ssm.model.BookVo;
import com.liaoxin.ssm.util.PageBean;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext-mybatis.xml"})
public class BookBizImplTest2 {
    @Autowired
    private BookBiz bookBiz;
//    private SqlSession sqlSession;

    @Before
    public void setUp() throws Exception {
        System.out.println("初始化方法");
    }

    @After
    public void tearDown() throws Exception {
        System.out.println("方法测试结束");
    }

    @Test
    public void deleteByPrimaryKey() {
        bookBiz.deleteByPrimaryKey(44);
    }

    @Test
    public void selectByPrimaryKey() {
        System.out.println("测试的业务方法");
//        System.out.println(bookBiz.getBookMapper());
        System.out.println(bookBiz.selectByPrimaryKey(43));
    }

    @Test
    public void test3() {
        int[] ints={};
//        将数组变成字符串 1,2,3,4,5,6
        StringBuffer sb=new StringBuffer();
        for (int i:ints){
            sb.append(",").append(i);
        }
        String s=sb.toString();
        System.out.println(s.substring(1));
    }

    @Test
    public void getBookMapper() {
    }

    @Test
    public void setBookMapper() {
    }

    @Test
    public void selectByIn() {
        List<Integer> bookIds = Arrays.asList(new Integer[]{31, 32, 33, 34});
        bookBiz.selectByIn(bookIds).forEach(System.out::println);
    }

    @Test
    public void selectBooksLike1() {
        bookBiz.selectBooksLike1("%圣墟%").forEach(System.out::println);
    }

    @Test
    public void selectBooksLike2() {
        bookBiz.selectBooksLike2("%圣墟%").forEach(System.out::println);
    }

    @Test
    public void selectBooksLike3() {
        bookBiz.selectBooksLike3("圣墟").forEach(System.out::println);
    }

    @Test
    public void list1() {
        bookBiz.list1().forEach(System.out::println);
    }

    @Test
    public void list2() {
        bookBiz.list2().forEach(System.out::println);
    }

    @Test
    public void list3() {
        BookVo vo=new BookVo();
        vo.setBookIds(Arrays.asList(new Integer[]{31,32,33,34}));
        bookBiz.list3(vo).forEach(System.out::println);
    }

    @Test
    public void list4() {
        bookBiz.list4().forEach(System.out::println);
    }

    @Test
    public void list5() {
        Map map=new HashMap();
        map.put("bid",32);
        System.out.println(bookBiz.list5(map));
    }

    @Test
    public void listPager() {
        Map map=new HashMap();
        map.put("bname","圣墟");
//        bookBiz.listPager(map).forEach(System.out::println);

//        查询出第二页的20条数据
        PageBean pageBean = new PageBean();
        pageBean.setPage(2);
        pageBean.setRows(20);

        bookBiz.listPager(map,pageBean).forEach(System.out::println);
    }

    @Test
    public void list6() {
        BookVo vo=new BookVo();
        vo.setMax(45);
        vo.setMin(35);
        bookBiz.list6(vo).forEach(System.out::println);
    }

    @Test
    public void list7() {
        BookVo vo=new BookVo();
        vo.setMax(45);
        vo.setMin(35);
        bookBiz.list7(vo).forEach(System.out::println);
    }
}

运行如下：?

二、Aop整合pagehelper插件

?使用AOP编程解决分页代码重复的问题
@Around(“execution(* *…*Service.*pager(…))”)
public Object invoke(ProceedingJoinPoint args)

语法结构：execution(方法修饰符方法返回值方法所属类匹配方法名 ( 方法中的形参表 ) 方法申明抛出的异常 )
“*” ：代表一个任意类型的参数；
“…”：代表零个或多个任意类型的参数。

/**
* *:返回值类型
* *：无限包
* *Service：以Service结尾接口名
* *Pager:以Pager方法
* 只要同时匹配上诉四个条件，就会被列为目标对象
* 上诉配置要生效，代理注解aop:aspectj-autoproxy/ 不能少
*
* @param args
* @return
* @throws Throwable
*/

1、PageAspect?

package com.liaoxin.ssm.aspect;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.liaoxin.ssm.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 {

    /**
     * *:返回值类型
     * *：无限包
     * *Service：以Service结尾接口名
     * *Pager:以Pager方法
     * 只要同时匹配上诉四个条件，就会被列为目标对象
     * 上诉配置要生效，代理注解<aop:aspectj-autoproxy/> 不能少
     *
     * @param args
     * @return
     * @throws Throwable
     */
    @Around("execution(* *..*Biz.*Pager(..))")
    public Object invoke(ProceedingJoinPoint args) throws Throwable {
        Object[] params = args.getArgs();
        PageBean pageBean = null;
        for (Object param : params) {
            if(param instanceof PageBean){
                pageBean = (PageBean)param;
                break;
            }
        }

        if(pageBean != null && pageBean.isPagination())
            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());

//        执行目标方法
        Object list = args.proceed(params);

        if(null != pageBean && pageBean.isPagination()){
            PageInfo pageInfo = new PageInfo((List) list);
            pageBean.setTotal(pageInfo.getTotal()+"");
        }
        return list;
    }


}

2、BookBizImpl

package com.liaoxin.ssm.biz.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.liaoxin.ssm.biz.BookBiz;
import com.liaoxin.ssm.mapper.BookMapper;
import com.liaoxin.ssm.model.Book;
import com.liaoxin.ssm.model.BookVo;
import com.liaoxin.ssm.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;

@Service
public class BookBizImpl implements BookBiz {
    @Autowired
    private BookMapper bookMapper;

//    alt+insert 快速提供set/get/tostring/构造方法
//    alt+enter 快速构建实现类，填充代码的前半部分 ctrl+1
//    public BookMapper getBookMapper() {
//        return bookMapper;
//    }

//    public void setBookMapper(BookMapper bookMapper) {
//        this.bookMapper = bookMapper;
//    }

    @Override
    public int deleteByPrimaryKey(Integer bid) {
        return bookMapper.deleteByPrimaryKey(bid);
    }

    @Override
    public Book selectByPrimaryKey(Integer bid) {
        return bookMapper.selectByPrimaryKey(bid);
    }

    @Override
    public List<Book> selectByIn(List bookIds) {
        return bookMapper.selectByIn(bookIds);
    }

    @Override
    public List<Book> selectBooksLike1(String bname) {
        return bookMapper.selectBooksLike1(bname);
    }

    @Override
    public List<Book> selectBooksLike2(String bname) {
        return bookMapper.selectBooksLike2(bname);
    }

    @Override
    public List<Book> selectBooksLike3(String bname) {
        return bookMapper.selectBooksLike3(bname);
    }

    @Override
    public List<Book> list1() {
        return bookMapper.list1();
    }

    @Override
    public List<Book> list2() {
        return bookMapper.list2();
    }

    @Override
    public List<Book> list3(BookVo vo) {
        return bookMapper.list3(vo);
    }

    @Override
    public List<Map> list4() {
        return bookMapper.list4();
    }

    @Override
    public Map list5(Map map) {
        return bookMapper.list5(map);
    }

    @Override
    public List<Map> listPager(Map map, PageBean pageBean){
        return bookMapper.listPager(map);
    }
//    public List<Map> listPager(Map map, PageBean pageBean) {
        pageHelper分页插件相关的代码
//        if(pageBean!=null&&pageBean.isPagination()){
//            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
//        }
//        List<Map> maps = bookMapper.listPager(map);
//        if(pageBean!=null&&pageBean.isPagination()){
            处理查询结果的前提是需要分页，是需要分页的
//            PageInfo info = new PageInfo(maps);
//            pageBean.setTotal(info.getTotal()+"");
//        }
//        return maps;
//    }

    @Override
    public List<Book> list6(BookVo bookVo) {
        return bookMapper.list6(bookVo);
    }

    @Override
    public List<Book> list7(BookVo bookVo) {
        return bookMapper.list7(bookVo);
    }
}

3、BookBizImplTest2

package com.liaoxin.ssm;

import com.liaoxin.ssm.biz.BookBiz;
import com.liaoxin.ssm.biz.impl.BookBizImpl;
import com.liaoxin.ssm.model.BookVo;
import com.liaoxin.ssm.util.PageBean;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext-mybatis.xml"})
public class BookBizImplTest2 {
    @Autowired
    private BookBiz bookBiz;
//    private SqlSession sqlSession;

    @Before
    public void setUp() throws Exception {
        System.out.println("初始化方法");
    }

    @After
    public void tearDown() throws Exception {
        System.out.println("方法测试结束");
    }

    @Test
    public void deleteByPrimaryKey() {
        bookBiz.deleteByPrimaryKey(44);
    }

    @Test
    public void selectByPrimaryKey() {
        System.out.println("测试的业务方法");
//        System.out.println(bookBiz.getBookMapper());
        System.out.println(bookBiz.selectByPrimaryKey(43));
    }

    @Test
    public void test3() {
        int[] ints={};
//        将数组变成字符串 1,2,3,4,5,6
        StringBuffer sb=new StringBuffer();
        for (int i:ints){
            sb.append(",").append(i);
        }
        String s=sb.toString();
        System.out.println(s.substring(1));
    }

    @Test
    public void getBookMapper() {
    }

    @Test
    public void setBookMapper() {
    }

    @Test
    public void selectByIn() {
        List<Integer> bookIds = Arrays.asList(new Integer[]{31, 32, 33, 34});
        bookBiz.selectByIn(bookIds).forEach(System.out::println);
    }

    @Test
    public void selectBooksLike1() {
        bookBiz.selectBooksLike1("%圣墟%").forEach(System.out::println);
    }

    @Test
    public void selectBooksLike2() {
        bookBiz.selectBooksLike2("%圣墟%").forEach(System.out::println);
    }

    @Test
    public void selectBooksLike3() {
        bookBiz.selectBooksLike3("圣墟").forEach(System.out::println);
    }

    @Test
    public void list1() {
        bookBiz.list1().forEach(System.out::println);
    }

    @Test
    public void list2() {
        bookBiz.list2().forEach(System.out::println);
    }

    @Test
    public void list3() {
        BookVo vo=new BookVo();
        vo.setBookIds(Arrays.asList(new Integer[]{31,32,33,34}));
        bookBiz.list3(vo).forEach(System.out::println);
    }

    @Test
    public void list4() {
        bookBiz.list4().forEach(System.out::println);
    }

    @Test
    public void list5() {
        Map map=new HashMap();
        map.put("bid",32);
        System.out.println(bookBiz.list5(map));
    }

    @Test
    public void listPager() {
        Map map=new HashMap();
        map.put("bname","圣墟");
//        bookBiz.listPager(map).forEach(System.out::println);

//        查询出第二页的20条数据
        PageBean pageBean = new PageBean();
        pageBean.setPage(2);
        pageBean.setRows(20);

        bookBiz.listPager(map,pageBean).forEach(System.out::println);
    }
    @Test
    public void testlistPager(){
        Map map=new HashMap();
        map.put("bname","圣墟");
        PageBean pageBean = new PageBean();
        pageBean.setPage(2);
        pageBean.setRows(20);
        bookBiz.listPager(map,pageBean).forEach(System.out::println);
    }
    @Test
    public void list6() {
        BookVo vo=new BookVo();
        vo.setMax(45);
        vo.setMin(35);
        bookBiz.list6(vo).forEach(System.out::println);
    }

    @Test
    public void list7() {
        BookVo vo=new BookVo();
        vo.setMax(45);
        vo.setMin(35);
        bookBiz.list7(vo).forEach(System.out::println);
    }
}