003 SSM框架整合

整合

将工程的三层结构中的 JavaBean 分别使用 Spring容器 （通过XML方式）进行管理。

1. 整合持久层 mapper ，包括 数据源 、 SqlSessionFactory 及 mapper 代理对象的整合；
2. 整合业务层 Service ，包括 事务Bean 及 service 的 bean 的配置；
3. 整合表现层 Controller ，直接使用 springmvc 的配置。
4. Web.xml 加载 spring 容器（包含多个XML文件，还分为 父子容器 ）

核心配置文件：
applicationContext-dao.xml
applicationContext-service.xml
springmvc.xml
web.xml

web.xml

<!DOCTYPE web-app PUBLIC"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN""http://java.sun.com/dtd/web-app_2_3.dtd" ><!--        <?xml version="1.0" encoding="UTF-8"?>-->
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee"xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"id="WebApp_ID" version="2.5"><display-name>Archetype Created Web Application</display-name><!-- 配置springmvc的前端控制器 --><servlet><servlet-name>ssm</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring/springmvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><servlet-mapping><servlet-name>ssm</servlet-name><url-pattern>/</url-pattern></servlet-mapping><!--  在web.xml中，使用监听器来对spring的配置文件进行加载：--><!-- 指定持久层和业务层的spring配置文件路径--><!-- 加载spring容器 --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring/applicationContext-*.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener></web-app>

applicationContext-dao.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: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/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd"><!-- 加载db.properties --><context:property-placeholder location="classpath:db.properties" /><!-- 配置数据源 -->
<!--    <bean id="dataSource" class="org.apache.commons.dbcp.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}" />-->
<!--        <property name="maxActive" value="30" />-->
<!--        <property name="maxIdle" value="5" />-->
<!--    </bean>--><!-- 配置数据源为HikariCP -->
<!--    <bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource"-->
<!--          destroy-method="close">-->
<!--        <property name="driverClassName" value="${jdbc.driver}" />-->
<!--        &lt;!&ndash; 注意：HikariCP 使用 jdbcUrl 而不是 url &ndash;&gt;-->
<!--        <property name="jdbcUrl" value="${jdbc.url}" />-->
<!--        <property name="username" value="${jdbc.username}" />-->
<!--        <property name="password" value="${jdbc.password}" />-->
<!--        &lt;!&ndash; HikariCP 的连接池大小配置 &ndash;&gt;-->
<!--        <property name="maximumPoolSize" value="30" />-->
<!--        &lt;!&ndash; HikariCP 没有直接的 maxIdle 属性，但可以通过 minimumIdle 控制空闲连接数 &ndash;&gt;-->
<!--        <property name="minimumIdle" value="5" />-->
<!--        &lt;!&ndash; 其他可选配置，如连接超时、空闲连接超时等 &ndash;&gt;-->
<!--        <property name="connectionTimeout" value="30000" />-->
<!--        <property name="idleTimeout" value="600000" />-->
<!--        <property name="maxLifetime" value="1800000" />-->
<!--    </bean>--><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}" /><property name="maxTotal" value="30" /> <!-- DBCP2 中使用 maxTotal 替代 maxActive --><property name="maxIdle" value="5" /><property name="minIdle" value="0" /> <!-- 可选，设置最小空闲连接数 --><!-- 可选的其他配置，如连接验证、超时设置等 --><property name="validationQuery" value="SELECT 1" /> <!-- 用于验证从池中取出的连接是否仍然有效 --><property name="testOnBorrow" value="true" /> <!-- 从池中取出连接时是否进行验证 --><property name="testOnReturn" value="false" /> <!-- 连接归还到池中时是否进行验证 --><property name="testWhileIdle" value="true" /> <!-- 连接空闲时是否进行验证，如果为true，还需要设置timeBetweenEvictionRunsMillis属性 --><property name="timeBetweenEvictionRunsMillis" value="30000" /> <!-- 连接空闲时检测空闲连接的时间间隔 --><property name="numTestsPerEvictionRun" value="3" /> <!-- 每次检测空闲连接时检测的连接数 --><property name="minEvictableIdleTimeMillis" value="1800000" /> <!-- 连接在池中保持空闲而不被空闲连接回收器线程(如果有)回收的最小时间值 --></bean><!-- 配置SqlSessionFacotory --><bean id="sqlSessionFactory"class="org.mybatis.spring.SqlSessionFactoryBean"><!-- 加载mybatis的配置文件(如果配置文件中没有配置项,可以忽略该文件)-->
<!--        <property name="configLocation"-->
<!--                  value="classpath:mybatis/SqlMapConfig.xml" />--><!-- 配置数据源 --><property name="dataSource" ref="dataSource" /><property name="typeAliasesPackage" value="com.ssm.po"></property></bean><!-- 配置mapper扫描器，SqlSessionConfig.xml中的mapper配置去掉 --><bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"><!-- 指定扫描的包 --><property name="basePackage" value="com.ssm.mapper" /></bean>
</beans>

applicationContext-service.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context"xmlns:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd"><!-- 扫描Service --><context:component-scan base-package="com.ssm.service" /><!-- 配置事务 --><!-- 事务管理器，对mybatis操作数据库进行事务控制，此处使用jdbc的事务控制 --><bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><!-- 指定要进行事务管理的数据源 --><property name="dataSource" ref="dataSource"></property></bean><!-- 通知 --><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><!-- 传播行为 --><tx:method name="save*" propagation="REQUIRED" /><tx:method name="add*" propagation="REQUIRED" /><tx:method name="insert*" propagation="REQUIRED" /><tx:method name="delete*" propagation="REQUIRED" /><tx:method name="del*" propagation="REQUIRED" /><tx:method name="remove*" propagation="REQUIRED" /><tx:method name="update*" propagation="REQUIRED" /><tx:method name="modify*" propagation="REQUIRED" /><tx:method name="find*" read-only="true" /><tx:method name="query*" read-only="true" /><tx:method name="select*" read-only="true" /><tx:method name="get*" read-only="true" /></tx:attributes></tx:advice><!-- aop -->
<!--    <aop:config>-->
<!--        <aop:advisor advice-ref="txAdvice"-->
<!--                     pointcut="execution(* com.ssm.service.impl.*.*(..))" />-->
<!--    </aop:config>--><aop:config><aop:advisor advice-ref="txAdvice"pointcut="execution(* *..*.*ServiceImpl.*(..))" /></aop:config>
</beans>

springmvc.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: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/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd"><!-- 配置三大组件之处理器映射器和处理器适配器 --><mvc:annotation-driven /><!-- 配置三大组件之视图解析器 --><beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/jsp/" /><property name="suffix" value=".jsp" /></bean><!-- 配置处理器Bean的读取 --><!-- 扫描controller注解,多个包中间使用半角逗号分隔--><!-- 使用注解的handler可以使用组件扫描器，加载handler --><context:component-scan base-package="com.ssm.controller" />
</beans>

db.properties

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?serverTimezone=Asia/Shanghai&characterEncoding=utf8&useSSL=false
jdbc.username=root
jdbc.password=root

log4j.properties

#dev env [debug] product env [info]
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

pom.xml

<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/maven-v4_0_0.xsd"><modelVersion>4.0.0</modelVersion><groupId>org.example</groupId><artifactId>ssm</artifactId><packaging>war</packaging><version>1.0-SNAPSHOT</version><name>ssm Maven Webapp</name><url>http://maven.apache.org</url><dependencies>
<!--    <dependency>-->
<!--      <groupId>junit</groupId>-->
<!--      <artifactId>junit</artifactId>-->
<!--      <version>3.8.1</version>-->
<!--      <scope>test</scope>-->
<!--    </dependency>--><!-- 持久层依赖 开始 --><!-- spring ioc组件需要的依赖包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>5.0.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>5.0.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>5.0.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>5.0.7.RELEASE</version></dependency><!-- spring 事务管理和JDBC依赖包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>5.0.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>5.0.7.RELEASE</version></dependency><!-- mysql数据库驱动包 --><!-- https://mvnrepository.com/artifact/com.mysql/mysql-connector-j --><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId><version>8.3.0</version></dependency><!-- dbcp连接池的依赖包 -->
<!--    <dependency>-->
<!--      <groupId>commons-dbcp</groupId>-->
<!--      <artifactId>commons-dbcp</artifactId>-->
<!--      <version>1.4</version>-->
<!--    </dependency>--><dependency><groupId>org.apache.commons</groupId><artifactId>commons-dbcp2</artifactId><version>2.12.0</version></dependency><!--      <dependency>-->
<!--          <groupId>com.zaxxer</groupId>-->
<!--          <artifactId>HikariCP</artifactId>-->
<!--          <version>4.0.3</version>-->
<!--      </dependency>--><!-- mybatis依赖 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.5.16</version></dependency><!-- mybatis和spring的整合依赖 --><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.3.1</version></dependency><!-- 持久层依赖 结束 --><!-- 业务层依赖 开始 --><!-- 基于AspectJ的aop依赖 --><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>5.0.7.RELEASE</version></dependency><dependency><groupId>aopalliance</groupId><artifactId>aopalliance</artifactId><version>1.0</version></dependency><!-- 业务层依赖 结束 --><!-- 表现层依赖 开始 --><!-- spring MVC依赖包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>5.0.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>5.0.7.RELEASE</version></dependency><!-- jstl 取决于视图对象是否是JSP --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version><scope>provided</scope></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>5.0.7.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-oxm</artifactId><version>5.0.7.RELEASE</version></dependency><dependency><groupId>com.thoughtworks.xstream</groupId><artifactId>xstream</artifactId><version>1.4.10</version></dependency><dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-databind</artifactId><version>2.9.6</version></dependency><!-- 表现层依赖 结束 --><!-- spring 单元测试组件包 --><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>5.0.7.RELEASE</version></dependency><!-- 单元测试Junit --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.12</version></dependency><!-- Mock测试使用的json-path依赖 --><dependency><groupId>com.jayway.jsonpath</groupId><artifactId>json-path</artifactId><version>2.2.0</version></dependency><!-- 文件上传 --><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.1</version></dependency></dependencies><build><finalName>ssm</finalName><plugins><!-- 配置Maven的JDK编译级别 --><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.2</version><configuration><source>1.8</source><target>1.8</target><encoding>UTF-8</encoding></configuration></plugin><plugin><groupId>org.apache.tomcat.maven</groupId><artifactId>tomcat7-maven-plugin</artifactId><version>2.2</version><configuration><path>/</path><port>80</port></configuration></plugin></plugins></build>
</project>

测试

表现层

• 请求URL：/queryItem
• 请求参数：无
• 请求返回值：json格式数据

业务层

• 业务处理逻辑（需求分析）：实现商品列表的查询

持久层

• 只针对表进行增删改查操作

sql

CREATE TABLE `item` (  `id` INT NOT NULL AUTO_INCREMENT,  `name` VARCHAR(255) DEFAULT NULL,  `price` FLOAT DEFAULT NULL,  `pic` VARCHAR(255) DEFAULT NULL,  `createtime` DATETIME DEFAULT NULL,  PRIMARY KEY (`id`)  
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

ItemController.java

package com.ssm.controller;import com.ssm.po.Item;
import com.ssm.service.ItemService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;import java.util.List;@Controller
public class ItemController {@Autowiredprivate ItemService service;@RequestMapping("/queryItem")@ResponseBodypublic List<Item> queryItem() {
// 根据查询条件去数据库中查询商品列表List<Item> itemList = service.queryItemList();return itemList;}
}

ItemMapper.java

package com.ssm.mapper;import com.ssm.po.Item;
import com.ssm.po.ItemExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;public interface ItemMapper {int countByExample(ItemExample example);int deleteByExample(ItemExample example);int deleteByPrimaryKey(Integer id);int insert(Item record);int insertSelective(Item record);List<Item> selectByExample(ItemExample example);Item selectByPrimaryKey(Integer id);int updateByExampleSelective(@Param("record") Item record, @Param("example") ItemExample example);int updateByExample(@Param("record") Item record, @Param("example") ItemExample example);int updateByPrimaryKeySelective(Item record);int updateByPrimaryKey(Item record);
}

Item.java

package com.ssm.po;import java.util.Date;public class Item {private Integer id;private String name;private Float price;private String pic;private Date createtime;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name == null ? null : name.trim();}public Float getPrice() {return price;}public void setPrice(Float price) {this.price = price;}public String getPic() {return pic;}public void setPic(String pic) {this.pic = pic == null ? null : pic.trim();}public Date getCreatetime() {return createtime;}public void setCreatetime(Date createtime) {this.createtime = createtime;}
}

ItemExample.java

package com.ssm.po;import java.util.ArrayList;
import java.util.Date;
import java.util.List;public class ItemExample {protected String orderByClause;protected boolean distinct;protected List<Criteria> oredCriteria;public ItemExample() {oredCriteria = new ArrayList<Criteria>();}public void setOrderByClause(String orderByClause) {this.orderByClause = orderByClause;}public String getOrderByClause() {return orderByClause;}public void setDistinct(boolean distinct) {this.distinct = distinct;}public boolean isDistinct() {return distinct;}public List<Criteria> getOredCriteria() {return oredCriteria;}public void or(Criteria criteria) {oredCriteria.add(criteria);}public Criteria or() {Criteria criteria = createCriteriaInternal();oredCriteria.add(criteria);return criteria;}public Criteria createCriteria() {Criteria criteria = createCriteriaInternal();if (oredCriteria.size() == 0) {oredCriteria.add(criteria);}return criteria;}protected Criteria createCriteriaInternal() {Criteria criteria = new Criteria();return criteria;}public void clear() {oredCriteria.clear();orderByClause = null;distinct = false;}protected abstract static class GeneratedCriteria {protected List<Criterion> criteria;protected GeneratedCriteria() {super();criteria = new ArrayList<Criterion>();}public boolean isValid() {return criteria.size() > 0;}public List<Criterion> getAllCriteria() {return criteria;}public List<Criterion> getCriteria() {return criteria;}protected void addCriterion(String condition) {if (condition == null) {throw new RuntimeException("Value for condition cannot be null");}criteria.add(new Criterion(condition));}protected void addCriterion(String condition, Object value, String property) {if (value == null) {throw new RuntimeException("Value for " + property + " cannot be null");}criteria.add(new Criterion(condition, value));}protected void addCriterion(String condition, Object value1, Object value2, String property) {if (value1 == null || value2 == null) {throw new RuntimeException("Between values for " + property + " cannot be null");}criteria.add(new Criterion(condition, value1, value2));}public Criteria andIdIsNull() {addCriterion("id is null");return (Criteria) this;}public Criteria andIdIsNotNull() {addCriterion("id is not null");return (Criteria) this;}public Criteria andIdEqualTo(Integer value) {addCriterion("id =", value, "id");return (Criteria) this;}public Criteria andIdNotEqualTo(Integer value) {addCriterion("id <>", value, "id");return (Criteria) this;}public Criteria andIdGreaterThan(Integer value) {addCriterion("id >", value, "id");return (Criteria) this;}public Criteria andIdGreaterThanOrEqualTo(Integer value) {addCriterion("id >=", value, "id");return (Criteria) this;}public Criteria andIdLessThan(Integer value) {addCriterion("id <", value, "id");return (Criteria) this;}public Criteria andIdLessThanOrEqualTo(Integer value) {addCriterion("id <=", value, "id");return (Criteria) this;}public Criteria andIdIn(List<Integer> values) {addCriterion("id in", values, "id");return (Criteria) this;}public Criteria andIdNotIn(List<Integer> values) {addCriterion("id not in", values, "id");return (Criteria) this;}public Criteria andIdBetween(Integer value1, Integer value2) {addCriterion("id between", value1, value2, "id");return (Criteria) this;}public Criteria andIdNotBetween(Integer value1, Integer value2) {addCriterion("id not between", value1, value2, "id");return (Criteria) this;}public Criteria andNameIsNull() {addCriterion("name is null");return (Criteria) this;}public Criteria andNameIsNotNull() {addCriterion("name is not null");return (Criteria) this;}public Criteria andNameEqualTo(String value) {addCriterion("name =", value, "name");return (Criteria) this;}public Criteria andNameNotEqualTo(String value) {addCriterion("name <>", value, "name");return (Criteria) this;}public Criteria andNameGreaterThan(String value) {addCriterion("name >", value, "name");return (Criteria) this;}public Criteria andNameGreaterThanOrEqualTo(String value) {addCriterion("name >=", value, "name");return (Criteria) this;}public Criteria andNameLessThan(String value) {addCriterion("name <", value, "name");return (Criteria) this;}public Criteria andNameLessThanOrEqualTo(String value) {addCriterion("name <=", value, "name");return (Criteria) this;}public Criteria andNameLike(String value) {addCriterion("name like", value, "name");return (Criteria) this;}public Criteria andNameNotLike(String value) {addCriterion("name not like", value, "name");return (Criteria) this;}public Criteria andNameIn(List<String> values) {addCriterion("name in", values, "name");return (Criteria) this;}public Criteria andNameNotIn(List<String> values) {addCriterion("name not in", values, "name");return (Criteria) this;}public Criteria andNameBetween(String value1, String value2) {addCriterion("name between", value1, value2, "name");return (Criteria) this;}public Criteria andNameNotBetween(String value1, String value2) {addCriterion("name not between", value1, value2, "name");return (Criteria) this;}public Criteria andPriceIsNull() {addCriterion("price is null");return (Criteria) this;}public Criteria andPriceIsNotNull() {addCriterion("price is not null");return (Criteria) this;}public Criteria andPriceEqualTo(Float value) {addCriterion("price =", value, "price");return (Criteria) this;}public Criteria andPriceNotEqualTo(Float value) {addCriterion("price <>", value, "price");return (Criteria) this;}public Criteria andPriceGreaterThan(Float value) {addCriterion("price >", value, "price");return (Criteria) this;}public Criteria andPriceGreaterThanOrEqualTo(Float value) {addCriterion("price >=", value, "price");return (Criteria) this;}public Criteria andPriceLessThan(Float value) {addCriterion("price <", value, "price");return (Criteria) this;}public Criteria andPriceLessThanOrEqualTo(Float value) {addCriterion("price <=", value, "price");return (Criteria) this;}public Criteria andPriceIn(List<Float> values) {addCriterion("price in", values, "price");return (Criteria) this;}public Criteria andPriceNotIn(List<Float> values) {addCriterion("price not in", values, "price");return (Criteria) this;}public Criteria andPriceBetween(Float value1, Float value2) {addCriterion("price between", value1, value2, "price");return (Criteria) this;}public Criteria andPriceNotBetween(Float value1, Float value2) {addCriterion("price not between", value1, value2, "price");return (Criteria) this;}public Criteria andPicIsNull() {addCriterion("pic is null");return (Criteria) this;}public Criteria andPicIsNotNull() {addCriterion("pic is not null");return (Criteria) this;}public Criteria andPicEqualTo(String value) {addCriterion("pic =", value, "pic");return (Criteria) this;}public Criteria andPicNotEqualTo(String value) {addCriterion("pic <>", value, "pic");return (Criteria) this;}public Criteria andPicGreaterThan(String value) {addCriterion("pic >", value, "pic");return (Criteria) this;}public Criteria andPicGreaterThanOrEqualTo(String value) {addCriterion("pic >=", value, "pic");return (Criteria) this;}public Criteria andPicLessThan(String value) {addCriterion("pic <", value, "pic");return (Criteria) this;}public Criteria andPicLessThanOrEqualTo(String value) {addCriterion("pic <=", value, "pic");return (Criteria) this;}public Criteria andPicLike(String value) {addCriterion("pic like", value, "pic");return (Criteria) this;}public Criteria andPicNotLike(String value) {addCriterion("pic not like", value, "pic");return (Criteria) this;}public Criteria andPicIn(List<String> values) {addCriterion("pic in", values, "pic");return (Criteria) this;}public Criteria andPicNotIn(List<String> values) {addCriterion("pic not in", values, "pic");return (Criteria) this;}public Criteria andPicBetween(String value1, String value2) {addCriterion("pic between", value1, value2, "pic");return (Criteria) this;}public Criteria andPicNotBetween(String value1, String value2) {addCriterion("pic not between", value1, value2, "pic");return (Criteria) this;}public Criteria andCreatetimeIsNull() {addCriterion("createtime is null");return (Criteria) this;}public Criteria andCreatetimeIsNotNull() {addCriterion("createtime is not null");return (Criteria) this;}public Criteria andCreatetimeEqualTo(Date value) {addCriterion("createtime =", value, "createtime");return (Criteria) this;}public Criteria andCreatetimeNotEqualTo(Date value) {addCriterion("createtime <>", value, "createtime");return (Criteria) this;}public Criteria andCreatetimeGreaterThan(Date value) {addCriterion("createtime >", value, "createtime");return (Criteria) this;}public Criteria andCreatetimeGreaterThanOrEqualTo(Date value) {addCriterion("createtime >=", value, "createtime");return (Criteria) this;}public Criteria andCreatetimeLessThan(Date value) {addCriterion("createtime <", value, "createtime");return (Criteria) this;}public Criteria andCreatetimeLessThanOrEqualTo(Date value) {addCriterion("createtime <=", value, "createtime");return (Criteria) this;}public Criteria andCreatetimeIn(List<Date> values) {addCriterion("createtime in", values, "createtime");return (Criteria) this;}public Criteria andCreatetimeNotIn(List<Date> values) {addCriterion("createtime not in", values, "createtime");return (Criteria) this;}public Criteria andCreatetimeBetween(Date value1, Date value2) {addCriterion("createtime between", value1, value2, "createtime");return (Criteria) this;}public Criteria andCreatetimeNotBetween(Date value1, Date value2) {addCriterion("createtime not between", value1, value2, "createtime");return (Criteria) this;}}public static class Criteria extends GeneratedCriteria {protected Criteria() {super();}}public static class Criterion {private String condition;private Object value;private Object secondValue;private boolean noValue;private boolean singleValue;private boolean betweenValue;private boolean listValue;private String typeHandler;public String getCondition() {return condition;}public Object getValue() {return value;}public Object getSecondValue() {return secondValue;}public boolean isNoValue() {return noValue;}public boolean isSingleValue() {return singleValue;}public boolean isBetweenValue() {return betweenValue;}public boolean isListValue() {return listValue;}public String getTypeHandler() {return typeHandler;}protected Criterion(String condition) {super();this.condition = condition;this.typeHandler = null;this.noValue = true;}protected Criterion(String condition, Object value, String typeHandler) {super();this.condition = condition;this.value = value;this.typeHandler = typeHandler;if (value instanceof List<?>) {this.listValue = true;} else {this.singleValue = true;}}protected Criterion(String condition, Object value) {this(condition, value, null);}protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {super();this.condition = condition;this.value = value;this.secondValue = secondValue;this.typeHandler = typeHandler;this.betweenValue = true;}protected Criterion(String condition, Object value, Object secondValue) {this(condition, value, secondValue, null);}}
}

ItemService.java

package com.ssm.service;import com.ssm.po.Item;import java.util.List;public interface ItemService {List<Item> queryItemList();
}

ItemServiceImpl.java

package com.ssm.service;import com.ssm.mapper.ItemMapper;
import com.ssm.po.Item;
import com.ssm.po.ItemExample;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;@Service
public class ItemServiceImpl implements ItemService {@Autowiredprivate ItemMapper mapper;public List<Item> queryItemList() {ItemExample example = new ItemExample();return mapper.selectByExample(example);}
}

ItemMapper.xml

<?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="com.ssm.mapper.ItemMapper" ><resultMap id="BaseResultMap" type="com.ssm.po.Item" ><id column="id" property="id" jdbcType="INTEGER" /><result column="name" property="name" jdbcType="VARCHAR" /><result column="price" property="price" jdbcType="REAL" /><result column="pic" property="pic" jdbcType="VARCHAR" /><result column="createtime" property="createtime" jdbcType="TIMESTAMP" /></resultMap><sql id="Example_Where_Clause" ><where ><foreach collection="oredCriteria" item="criteria" separator="or" ><if test="criteria.valid" ><trim prefix="(" suffix=")" prefixOverrides="and" ><foreach collection="criteria.criteria" item="criterion" ><choose ><when test="criterion.noValue" >and ${criterion.condition}</when><when test="criterion.singleValue" >and ${criterion.condition} #{criterion.value}</when><when test="criterion.betweenValue" >and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}</when><when test="criterion.listValue" >and ${criterion.condition}<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >#{listItem}</foreach></when></choose></foreach></trim></if></foreach></where></sql><sql id="Update_By_Example_Where_Clause" ><where ><foreach collection="example.oredCriteria" item="criteria" separator="or" ><if test="criteria.valid" ><trim prefix="(" suffix=")" prefixOverrides="and" ><foreach collection="criteria.criteria" item="criterion" ><choose ><when test="criterion.noValue" >and ${criterion.condition}</when><when test="criterion.singleValue" >and ${criterion.condition} #{criterion.value}</when><when test="criterion.betweenValue" >and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}</when><when test="criterion.listValue" >and ${criterion.condition}<foreach collection="criterion.value" item="listItem" open="(" close=")" separator="," >#{listItem}</foreach></when></choose></foreach></trim></if></foreach></where></sql><sql id="Base_Column_List" >id, name, price, pic, createtime</sql><select id="selectByExample" resultMap="BaseResultMap" parameterType="com.ssm.po.ItemExample" >select<if test="distinct" >distinct</if><include refid="Base_Column_List" />from item<if test="_parameter != null" ><include refid="Example_Where_Clause" /></if><if test="orderByClause != null" >order by ${orderByClause}</if></select><select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >select<include refid="Base_Column_List" />from itemwhere id = #{id,jdbcType=INTEGER}</select><delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >delete from itemwhere id = #{id,jdbcType=INTEGER}</delete><delete id="deleteByExample" parameterType="com.ssm.po.ItemExample" >delete from item<if test="_parameter != null" ><include refid="Example_Where_Clause" /></if></delete><insert id="insert" parameterType="com.ssm.po.Item" >insert into item (id, name, price,pic, createtime)values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{price,jdbcType=REAL},#{pic,jdbcType=VARCHAR}, #{createtime,jdbcType=TIMESTAMP})</insert><insert id="insertSelective" parameterType="com.ssm.po.Item" >insert into item<trim prefix="(" suffix=")" suffixOverrides="," ><if test="id != null" >id,</if><if test="name != null" >name,</if><if test="price != null" >price,</if><if test="pic != null" >pic,</if><if test="createtime != null" >createtime,</if></trim><trim prefix="values (" suffix=")" suffixOverrides="," ><if test="id != null" >#{id,jdbcType=INTEGER},</if><if test="name != null" >#{name,jdbcType=VARCHAR},</if><if test="price != null" >#{price,jdbcType=REAL},</if><if test="pic != null" >#{pic,jdbcType=VARCHAR},</if><if test="createtime != null" >#{createtime,jdbcType=TIMESTAMP},</if></trim></insert><select id="countByExample" parameterType="com.ssm.po.ItemExample" resultType="java.lang.Integer" >select count(*) from item<if test="_parameter != null" ><include refid="Example_Where_Clause" /></if></select><update id="updateByExampleSelective" parameterType="map" >update item<set ><if test="record.id != null" >id = #{record.id,jdbcType=INTEGER},</if><if test="record.name != null" >name = #{record.name,jdbcType=VARCHAR},</if><if test="record.price != null" >price = #{record.price,jdbcType=REAL},</if><if test="record.pic != null" >pic = #{record.pic,jdbcType=VARCHAR},</if><if test="record.createtime != null" >createtime = #{record.createtime,jdbcType=TIMESTAMP},</if></set><if test="_parameter != null" ><include refid="Update_By_Example_Where_Clause" /></if></update><update id="updateByExample" parameterType="map" >update itemset id = #{record.id,jdbcType=INTEGER},name = #{record.name,jdbcType=VARCHAR},price = #{record.price,jdbcType=REAL},pic = #{record.pic,jdbcType=VARCHAR},createtime = #{record.createtime,jdbcType=TIMESTAMP}<if test="_parameter != null" ><include refid="Update_By_Example_Where_Clause" /></if></update><update id="updateByPrimaryKeySelective" parameterType="com.ssm.po.Item" >update item<set ><if test="name != null" >name = #{name,jdbcType=VARCHAR},</if><if test="price != null" >price = #{price,jdbcType=REAL},</if><if test="pic != null" >pic = #{pic,jdbcType=VARCHAR},</if><if test="createtime != null" >createtime = #{createtime,jdbcType=TIMESTAMP},</if></set>where id = #{id,jdbcType=INTEGER}</update><update id="updateByPrimaryKey" parameterType="com.ssm.po.Item" >update itemset name = #{name,jdbcType=VARCHAR},price = #{price,jdbcType=REAL},pic = #{pic,jdbcType=VARCHAR},createtime = #{createtime,jdbcType=TIMESTAMP}where id = #{id,jdbcType=INTEGER}</update>
</mapper>