spring整合mybatis实现增删改查
学习了三天spring,现在我们可以做整合了
上代码吧
1:在pom.xml中添加spring-context、druid、mybatis、mysql-connector-java等基础依赖
mysql
mysql-connector-java
8.0.26
org.mybatis
mybatis
3.5.5
org.springframework
spring-jdbc
5.2.10.RELEASE
org.springframework
spring-context
5.2.10.RELEASE
org.mybatis
mybatis-spring
1.3.0
com.alibaba
druid
1.2.8
2:搭建三层架构
dao层
/**
* @author 王磊
* @date 2022/4/28
*/
@Repository
public interface BrandsMapper {
//查询所有
@ResultMap("brandresultmap")
@Select("select * from tb_brand")
List selectAll();
//单条件查询
@ResultMap("brandresultmap")
@Select("select * from tb_brand where id=#{id}")
Brand selectByid(int id);
//多条件动态查询
List selectByids(Brand brand);
//动态修改数据
void update(Brand brand);
//删除一个
void deleteByid(int id);
//批量删除
void deleteByids(@Param("ids") int[] ids);
//添加数据
void add(Brand brand);
}
Service层
/**
* @author 王磊
* @date 2022/4/28
*/
public interface BrandService {
//查询所有
List selectAll();
//条件查询
Brand selectByid(int id);
//多条件动态查询
List selectByids(Brand brand);
//动态修改数据
void update(Brand brand);
//删除一个
void deleteByid(int id);
//批量删除
void deleteByids(int[] ids);
void add(Brand brand);
}
实现类
**
* @author 王磊
* @date 2022/4/28
*/
@Service
public class BrandServiceImpl implements BrandService {
@Autowired
private BrandsMapper brandMapper;
@Override
public List selectAll() {
List brands = brandMapper.selectAll();
return brands;
}
@Override
public Brand selectByid(int id) {
Brand brand = brandMapper.selectByid(id);
return brand;
}
@Override
public List selectByids(Brand brand) {
List brands = brandMapper.selectByids(brand);
return brands;
}
@Override
public void update(Brand brand) {
brandMapper.update(brand);
}
@Override
public void deleteByid(int id) {
brandMapper.deleteByid(id);
}
@Override
public void deleteByids(int[] ids) {
brandMapper.deleteByids(ids);
}
@Override
public void add(Brand brand) {
brandMapper.add(brand);
}
}
domain层
/**
* @author 王磊
* @date 2022/4/28
*/
public class Brand {
/**
* 品牌实体类
*/
// id 主键
private Integer id;
// 品牌名称
private String brandName;
// 企业名称
private String companyName;
// 排序字段
private Integer ordered;
// 描述信息
private String description;
// 状态：0：禁用 1：启用
private Integer status;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getBrandName() {
return brandName;
}
public void setBrandName(String brandName) {
this.brandName = brandName;
}
public String getCompanyName() {
return companyName;
}
public void setCompanyName(String companyName) {
this.companyName = companyName;
}
public Integer getOrdered() {
return ordered;
}
public void setOrdered(Integer ordered) {
this.ordered = ordered;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
@Override
public String toString() {
return "Brand{" +
"id=" + id +
", brandName='" + brandName + '\'' +
", companyName='" + companyName + '\'' +
", ordered=" + ordered +
", description='" + description + '\'' +
", status=" + status +
'}';
}
}controller层
/**
* @author 王磊
* @date 2022/4/28
*/
@Controller
public class BrandController {
@Autowired
private BrandService brandService;
//查询所有
public List selectAll() {
return brandService.selectAll();
}
//条件查询
public Brand selectByid(int id) {
return brandService.selectByid(id);
}
//多条件动态查询
public List selectByids(Brand brand) {
String brandName = brand.getBrandName();
String companyName = brand.getCompanyName();
if (brandName!=null && brandName!=""){
brandName="%"+brandName+"%";
brand.setBrandName(brandName);
}
if (companyName!=null && companyName!=""){
companyName="%"+companyName+"%";
brand.setCompanyName(companyName);
}
return brandService.selectByids(brand);
}
//动态修改数据
public void update(Brand brand){
brandService.update(brand);
}
//删除一个
public void deleteByid(int id){
brandService.deleteByid(id);
}
//批量删除
public void deleteByids(int[] ids){
brandService.deleteByids(ids);
}
//添加数据
public void add(Brand brand){
brandService.add(brand);
}
}
xml文件
insert into tb_brand (brand_name,company_name,ordered,description,status)
values(#{brandName},#{companyName},#{ordered},#{description},#{status})
update tb_brand
brand_name=#{brandName},
company_name=#{companyName},
ordered=#{ordered},
description=#{description},
status=#{status}
where id = #{id};
delete from tb_brand where id=#{id}
delete from tb_brand where id in
#{id}
好了,最重要的来了,配置文件类
首先先准备jdbc.properties文件
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis
jdbc.username=root
jdbc.password=root然后jdbc配置类
我们要获取一个 dataSource对象,spring有一个注解叫Bean作用:方法的返回值交给spring管理
/**
* @author 王磊
* @date 2022/4/28
*/
public class JdbcConfig {
@Value("${jdbc.driver}")
private String driver;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String userName;
@Value("${jdbc.password}")
private String password;
@Bean
public DataSource dataSource(){
DruidDataSource ds = new DruidDataSource();
ds.setDriverClassName(driver);
ds.setUrl(url);
ds.setUsername(userName);
ds.setPassword(password);
return ds;
}
}
接下来是Mybatis的配置类
/**
* @author 王磊
* @date 2022/4/28
*/
public class MybatisConfig {
//定义bean，SqlSessionFactoryBean，用于产生SqlSessionFactory对象
@Bean
public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource){
SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();
//实体类
ssfb.setTypeAliasesPackage("com.xxx.domain");
ssfb.setDataSource(dataSource);
return ssfb;
}
//定义bean，返回MapperScannerConfigurer对象
@Bean
public MapperScannerConfigurer mapperScannerConfigurer(){
MapperScannerConfigurer msc = new MapperScannerConfigurer();
msc.setBasePackage("com.xxx.dao");//接口
return msc;
}
}
最后,spring配置类
**
* @author 王磊
* @date 2022/4/28
*/
@Configuration//声明这是一个配置类
@ComponentScan("com.itheima")//包扫描
@PropertySource("classpath:jdbc.properties")//加载配置文件
@Import({JdbcConfig.class,MybatisConfig.class})//导入外部构造类
public class SpringConfig {}
测试类
/**
* @author 王磊
* @date 2022/4/28
*/
public class app {
public static void main(String[] args) {
ApplicationContext context = new
AnnotationConfigApplicationContext(SpringConfig.class);
BrandController Controller = context.getBean(BrandController.class);
//查询所有
// List brands = Controller.selectAll();
System.out.println(brands);
//条件查询
Brand brand =Controller.selectByid(4);
System.out.println(brand);
//多条件动态查询-
Brand brand = new Brand();
brand.setBrandName("阿里");
List brands1 = Controller.selectByids(brand);
System.out.println(brands1);
//动态修改数据
Brand brand = new Brand();
brand.setId(4);
brand.setBrandName("字节跳动");
Controller.update(brand);
//删除一个
Controller.deleteByid(5);
//批量删除
int[] arr = {6, 7, 8};
Controller.deleteByids(arr);
//添加数据
Brand brand = new Brand();
brand.setBrandName("软通动力");
brand.setCompanyName("软通动力有限公司");
brand.setOrdered(20);
brand.setDescription("知名外包公司");
brand.setStatus(1);
Controller.add(brand);
}
}
完美收工,spring整合mybatis是我们必须要掌握的本领,日更,有不懂的欢迎留言