如题，题主正在学ssm，学到了spring整合Mybatis这一块，但mapper的代理对象自动装填这里一直报错（我一个字一个字照着黑马的视频敲的），网上也找不到解决方案了
这是整体项目目录
这是JdbcConfig
package com.xxx.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
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
public DataSource dataSource(){
DruidDataSource ds = new DruidDataSource();
ds.setDriverClassName(driver);
ds.setUrl(url);
ds.setUsername(username);
ds.setPassword(password);
return ds;
}
}
这是MybatisConfig
package com.xxx.config;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.xxx.config.JdbcConfig;
import javax.sql.DataSource;
public class MybatisConfig {
@Bean
public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource){
SqlSessionFactoryBean ssfb = new SqlSessionFactoryBean();
//设置模型类的别名扫描
ssfb.setTypeAliasesPackage("com.xxx.domain");
//设置数据源
ssfb.setDataSource(dataSource);
return ssfb;
}
@Bean
public MapperScannerConfigurer mapperScannerConfigurer(){
MapperScannerConfigurer msc =new MapperScannerConfigurer();
msc.setBasePackage("com.xxx.dao");
return msc;
}
}
这是SpringConfig
package com.xxx.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.xxx")
@PropertySource("classpath:jdbc.properties")
@Import({JdbcConfig.class, MybatisConfig.class})
public class SpringConfig {
}
这是AccountDao
package com.xxx.dao;
import com.xxx.domain.Account;
import org.apache.ibatis.annotations.*;
import java.util.List;
public interface AccountDao {
@Insert("insert into tbl_account(name,money)values(#{name},#{money})")
void save(Account account);
@Delete("delete from tbl_account where id = #{id} ")
void delete(Integer id);
@Update("update tbl_account set name = #{name} , money = #{money} where id = #{id} ")
void update(Account account);
@Select("select * from tbl_account")
List<Account> findAll();
@Select("select * from tbl_account where id = #{id} ")
Account findById(Integer id);
}
这是Account
package com.xxx.domain;
import java.io.Serializable;
public class Account implements Serializable {
public Integer id;
public String name;
public 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 +
'}';
}
}
这是AccountServiceImpl
package com.xxx.service.impl;
import com.xxx.dao.AccountDao;
import com.xxx.domain.Account;
import com.xxx.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
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();
}
}
这是AccountService
package com.xxx.service;
import com.xxx.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);
}
这是App
import com.xxx.config.SpringConfig;
import com.xxx.dao.AccountDao;
import com.xxx.service.AccountService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import java.io.IOException;
public class App {
public static void main(String[] args) {
ApplicationContext ctx=new AnnotationConfigApplicationContext(SpringConfig.class);
AccountService cs = ctx.getBean(AccountService.class);
cs.findById(1);
System.out.println(cs);
}
}
这是jdbc.properties
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/Mybatis?useSSL=false
jdbc.username=root
jdbc.password=131466
这是数据库
还望各位不吝赐教
