ssm整合通用mapper
1.加入通用mapper依赖
<!--通用Mapper --> <dependency> <groupId>tk.mybatis</groupId> <artifactId>mapper</artifactId> <version>4.1.4</version> </dependency>
完整的pom.xml文件
<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>com.qingfeng</groupId>
<artifactId>SSM-Mapper</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<spring.version>5.0.5.RELEASE</spring.version>
<mybatis.version>3.4.5</mybatis.version>
<mybatis.spring.version>1.3.1</mybatis.spring.version>
<mybatis.paginator.version>1.2.15</mybatis.paginator.version>
<junit.version>4.12</junit.version>
<jackson.version>2.9.4</jackson.version>
<druid.version>1.1.0</druid.version>
<mysql-connector-java>5.1.30</mysql-connector-java>
<spring.security.version>5.0.5.RELEASE</spring.security.version>
</properties>
<dependencies>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</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-jms</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 单元测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<!-- Mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!-- MyBatis整合Spring -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!-- Mybatis的分页插件 -->
<dependency>
<groupId>com.github.miemiedev</groupId>
<artifactId>mybatis-paginator</artifactId>
<version>${mybatis.paginator.version}</version>
</dependency>
<!-- jackson -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<!--通用Mapper -->
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper</artifactId>
<version>4.1.4</version>
</dependency>
<!-- 数据源/数据库连接池 -->
<!-- druid -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<!-- MySQL数据库连接驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-connector-java}</version>
</dependency>
<!-- lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.16.12</version>
</dependency>
<!--引入Servlet支持 -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<configuration>
<!-- 指定端口 -->
<port>9002</port>
<!-- 请求路径 -->
<path>/</path>
</configuration>
</plugin>
</plugins>
</build>
</project>
和通用 Mapper 以前版本一样，可以直接使用 tk.mybatis 提供的 tk.mybatis.spring.mapper.MapperScannerConfigurer 进行配置，这个配置和
MyBatis 官方提供的 org.mybatis.spring.mapper.MapperScannerConfigurer 区别只是第一层的包名， tk 和 org 。所以使用这种方式时，如果你项目已经使用 org. 进行了配置，只需要改成 tk. 即可。
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--加载mybatis的配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml" />
<!-- 指定数据源，值为以上配置的数据源 -->
<property name="dataSource" ref="dataSource" />
<!--指定mapper.xml映射文件的位置-->
<property name="mapperLocations" value="classpath:mapper/*.xml" />
</bean>
完整的
<?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: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.alibaba.com/schema/stat http://www.alibaba.com/schema/stat.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="ignoreUnresolvablePlaceholders" value="true"/>
<property name="locations">
<list>
<value>classpath:db.properties</value>
</list>
</property>
</bean>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="driverClassName" value="${db.driverClassName}" />
<property name="url" value="${db.url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}" />
<property name="initialSize" value="3" />
<property name="minIdle" value="3" />
<property name="maxActive" value="20" />
<property name="maxWait" value="60000" />
<property name="filters" value="stat,wall" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--加载mybatis的配置文件-->
<property name="configLocation" value="classpath:mybatis-config.xml" />
<!-- 指定数据源，值为以上配置的数据源 -->
<property name="dataSource" ref="dataSource" />
<!--指定mapper.xml映射文件的位置-->
<property name="mapperLocations" value="classpath:mapper/*.xml" />
</bean>
<bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 指定接口文件的位置 -->
<property name="basePackage" value="com.qingfeng.dao" />
<!--指定sqlSessionFactory，值为以上配置的sqlSessionFactory-->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
<!-- tx事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 启动注解驱动 -->
<tx:annotation-driven transaction-manager="transactionManager" />
<!-- druid -->
<!--监控数据相关的-->
<bean id="stat-filter" class="com.alibaba.druid.filter.stat.StatFilter">
<!--当时间超过3000毫秒，这就是个慢sql，需要我们去处理-->
<property name="slowSqlMillis" value="3000" />
<!--发现了慢SQL，可以以log的日志计录下来-->
<property name="logSlowSql" value="true" />
<property name="mergeSql" value="true" />
</bean>
<bean id="wall-filter" class="com.alibaba.druid.wall.WallFilter">
<!--指定监控的db是mysql-->
<property name="dbType" value="mysql" />
</bean>
</beans>
实体类映射
1.表名可以使用@Table(name = "tableName")进行指定,对不符合第一条默认规则的可以通过这种方式指定表名.
2.字段默认和@Column一样,都会作为表字段,表字段默认为Java对象的Field名字驼峰转下划线形式.
3.可以使用@Column(name = "fieldName")指定不符合第3条规则的字段名
4.使用@Transient注解可以忽略字段,添加该注解的字段不会作为表字段使用.
5.建议一定是有一个@Id注解作为主键的字段,可以有多个@Id注解的字段作为联合主键.
6.默认情况下,实体类中如果不存在包含@Id注解的字段,所有的字段都会作为主键字段进行使用(这种效率极低).
7.实体类可以继承使用,可以参考测试代码中的com.github.abel533.model.UserLogin2类.
8.由于基本类型,如int作为实体类字段时会有默认值0,而且无法消除,所以实体类中建议不要使用基本类型.
package com.qingfeng.pojo;
import java.io.Serializable;
import java.util.Date;
import javax.persistence.Id;
import javax.persistence.Table;
/**
* 用户实体类
* @author Administrator
*
*/
@Table(name="tb_user")
public class TBUser implements Serializable{
/**
*
*/
private static final long serialVersionUID = -1223633684656774146L;
@Id
private Long id;//id
private String username;//用户名
private String password;//密码，加密存储
private String phone;//注册手机号
private String email;//注册邮箱
private Date created;//创建时间
private String name;//真实姓名
private String status;//使用状态（1正常 0非正常）
private String qq;//QQ号码
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Date getCreated() {
return created;
}
public void setCreated(Date created) {
this.created = created;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getQq() {
return qq;
}
public void setQq(String qq) {
this.qq = qq;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", password=" + password + ", phone=" + phone + ", email="
+ email + ", created=" + created + ", name=" + name + ", status=" + status + ", qq=" + qq + "]";
}
}
创建Mapper接口
package com.qingfeng.dao;
import com.qingfeng.pojo.TBUser;
import tk.mybatis.mapper.common.Mapper;
/**
* 继承通用Mapper
* @author Administrator
*
*/
public interface UserMapper extends Mapper<TBUser> {
}
这里继承了 tk.mybatis.mapper.common.Mapper 接口，在接口上指定了泛型类型 Brand 。当你继承了 Mapper 接口后，此时就已经有了针对 Brand 的大量方法
测试：
package com.qingfeng;
import java.util.List;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.qingfeng.dao.UserMapper;
import com.qingfeng.pojo.TBUser;
public class TestUserMapper {
private AbstractApplicationContext ac;
private UserMapper userMapper;
@Before
public void doBefore() {
ac = new ClassPathXmlApplicationContext("classpath*:applicationContext.xml");
userMapper = ac.getBean("userMapper",
UserMapper.class);
}
@After
public void doAfter() {
ac.close();
}
@Test
public void testUser() {
List<TBUser> selectAll = userMapper.selectAll();
for(TBUser user:selectAll) {
System.out.println(user);
}
}
}
结果：
User [id=1, username=admin, password=123456, phone=13699996666, email=1412330@qq.com, created=Thu Jul 30 23:23:29 CST 2020, name=qq, status=1, qq=1412330] User [id=2, username=spring, password=$2a$10$rIxa8dDL8F8Bf.TeC5rOeev96e0wTo0FIuLmtdJ6T/a8CptHlAlga, phone=13698566966, email=123456@qq.com, created=Thu Jul 30 02:16:36 CST 2020, name=spring, status=1, qq=123456]
