spring整合mybatis案例
首先需要sql：sql结构下载。
案例目录结构
实体类Account
package com.limei.domain;
import java.io.Serializable;
public class Account implements Serializable {
private Integer id;
private String name;
private Double money;
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;
}
public Double getMoney() {
return money;
}
public void setMoney(Double money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"id=" + id +
", name='" + name + '\'' +
", money=" + money +
'}';
}
}
jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/lianxi
jdbc.username=root
jdbc.password=1234562.编写业务层接口与实现类
package com.limei.service;
import com.limei.domain.Account;
import java.util.List;
public interface AccountService {
void save(Account account);
void delete(Integer id);
void update(Account account);
List<Account> findAll();
Account findById(Integer id);
}
package com.limei.service.impl;
import com.limei.dao.AccountDao;
import com.limei.domain.Account;
import com.limei.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service("accountService")
public class AccountServiceImpl implements AccountService {
@Autowired
private AccountDao accountDao;
public void save(Account account) {
accountDao.save(account);
}
public void update(Account account){
accountDao.update(account);
}
public void delete(Integer id) {
accountDao.delete(id);
}
public Account findById(Integer id) {
return accountDao.findById(id);
}
public List<Account> findAll() {
return accountDao.findAll();
}
}
3.编写数据层接口
package com.limei.dao;
import com.limei.domain.Account;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import java.util.List;
public interface AccountDao {
@Insert("insert into account(name,money)values(#{name},#{money})")
void save(Account account);
@Delete("delete from account where id = #{id} ")
void delete(Integer id);
@Update("update account set name = #{name} , money = #{money} where id = #{id} ")
void update(Account account);
@Select("select * from account")
List<Account> findAll();
@Select("select * from account where id = #{id} ")
Account findById(Integer id);
}4.编写原来的xml为注解方式
package com.limei.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import javax.sql.DataSource;
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("dataSource")
public DataSource getDataSource(){
DruidDataSource ds = new DruidDataSource();
ds.setDriverClassName(driver);
ds.setUrl(url);
ds.setUsername(userName);
ds.setPassword(password);
return ds;
}
}
.package com.limei.config;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import javax.sql.DataSource;
public class MyBatisConfig {
@Bean
public SqlSessionFactoryBean getSqlSessionFactoryBean(@Autowired DataSource dataSource){
SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();
ssfb.setTypeAliasesPackage("com.limei.domain");
ssfb.setDataSource(dataSource);
return ssfb;
}
@Bean
public MapperScannerConfigurer getMapperScannerConfigurer(){
MapperScannerConfigurer msc = new MapperScannerConfigurer();
msc.setBasePackage("com.limei.dao");
return msc;
}
}
package com.limei.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.PropertySource;
@Configuration
@ComponentScan("com.limei")
@PropertySource("classpath:jdbc.properties")
@Import({JDBCConfig.class,MyBatisConfig.class})
public class SpringConfig {
}5.main方法运行
Test.java
import com.limei.config.SpringConfig;
import com.limei.domain.Account;
import com.limei.service.AccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
public class Test {
public static void main(String[] args) {
// ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");
// AccountService accountService = (AccountService) ctx.getBean("accountService");
// Account ac = accountService.findById(2);
// System.out.println(ac);
ApplicationContext ctx = new AnnotationConfigApplicationContext ( SpringConfig.class);
AccountService accountService = (AccountService) ctx.getBean("accountService");
Account ac = accountService.findById(2);
System.out.println(ac);
}
}6.注解测试UserServiceTest运行
package limei.service;
import com.limei.config.SpringConfig;
import com.limei.domain.Account;
import com.limei.service.AccountService;
import org.junit.Assert;
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.List;
//设定spring专用的类加载器
@RunWith(SpringJUnit4ClassRunner.class)
//设定加载的spring上下文对应的配置
@ContextConfiguration(classes = SpringConfig.class)
public class UserServiceTest {
@Autowired
private AccountService accountService;
@Test
public void testFindById(){
Account ac = accountService.findById(2);
// System.out.println(ac);
Assert.assertEquals("李四",ac.getName());
}
@Test
public void testFindAll(){
List<Account> list = accountService.findAll();
Assert.assertEquals(7,list.size());
}
}
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