我们的项目是Maven工程,项目结构如下:
pom.xml:
4.0.0
com.zl
spring_day02_example_crud_anno
1.0-SNAPSHOT
org.apache.maven.plugins
maven-compiler-plugin
8
jar
org.springframework
spring-context
5.0.2.RELEASE
org.springframework
spring-test
5.0.2.RELEASE
mysql
mysql-connector-java
5.1.6
junit
junit
4.12
c3p0
c3p0
0.9.1.2
commons-dbutils
commons-dbutils
1.4
com.zl.domain.Account实体类:
package com.zl.domain;
public class Account {
private Integer id;
private String name;
private Float 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 Float getMoney() {
return money;
}
public void setMoney(Float money) {
this.money = money;
}
@Override
public String toString() {
return "Account{" +
"id=" + id +
", name='" + name + '\'' +
", money=" + money +
'}';
}
}
com.zl.service.AccountService接口:
package com.zl.service;
import com.zl.domain.Account;
import java.util.List;
public interface AccountService {
/**
* 查找所有账户
* @return
*/
List findAll();
/**
* 根据id查询账户
* @param id
* @return
*/
Account findById(Integer id);
/**
* 保存账户
* @param account
*/
void saveAccount(Account account);
/**
* 更新账户
* @param account
*/
void updateAccount(Account account);
/**
* 根据id删除用户
* @param id
*/
void deleteAccount(Integer id);
}
com.zl.service.AccountServiceImpl实现类:
package com.zl.service.impl;
import com.zl.dao.AccountDao;
import com.zl.domain.Account;
import com.zl.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 dao;
public void setDao(AccountDao dao) {
this.dao = dao;
}
public List findAll() {
return dao.findAll();
}
public Account findById(Integer id) {
return dao.findById(id);
}
public void saveAccount(Account account) {
dao.saveAccount(account);
}
public void updateAccount(Account account) {
dao.updateAccount(account);
}
public void deleteAccount(Integer id) {
dao.deleteAccount(id);
}
}
com.zl.dao.AccountDao接口:
package com.zl.dao;
import com.zl.domain.Account;
import java.util.List;
public interface AccountDao {
/**
* 查找所有账户
* @return
*/
List findAll();
/**
* 根据id查询账户
* @param id
* @return
*/
Account findById(Integer id);
/**
* 保存账户
* @param account
*/
void saveAccount(Account account);
/**
* 更新账户
* @param account
*/
void updateAccount(Account account);
/**
* 根据id删除用户
* @param id
*/
void deleteAccount(Integer id);
}
com.zl.dao.AccountDaoImpl实现类:
package com.zl.dao.impl;
import com.zl.dao.AccountDao;
import com.zl.domain.Account;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import java.sql.SQLException;
import java.util.List;
@Repository("accountDao")
public class AccountDaoImpl implements AccountDao {
@Autowired
private QueryRunner queryRunner;
public List findAll() {
try {
return queryRunner.query("select * from account",new BeanListHandler(Account.class));
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public Account findById(Integer id) {
try {
return queryRunner.query("select * from account where id=?",new BeanHandler(Account.class),id);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public void saveAccount(Account account) {
try {
queryRunner.update("insert into account(name,money) values(?,?)",account.getName(),account.getMoney());
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public void updateAccount(Account account) {
try {
queryRunner.update("update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
public void deleteAccount(Integer id) {
try {
queryRunner.update("delete from account where id=?",id);
} catch (SQLException e) {
throw new RuntimeException(e);
}
}
}
com.zl.conf.SpringConfiguration父配置类:
package com.zl.conf;
import org.springframework.context.annotation.*;
@Configuration
@ComponentScan("com.zl")
@PropertySource("classpath:jdbc.properties")
@Import(JdbcConfiguration.class)
public class SpringConfiguration {
}
com.zl.conf.JdbcConfiguration子配置类---数据库配置:
package com.zl.conf;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.apache.commons.dbutils.QueryRunner;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Scope;
import javax.sql.DataSource;
//@Configuration
public class JdbcConfiguration {
@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(name="runner")
@Scope("prototype")
public QueryRunner createQueryRunner(@Qualifier("ds1") DataSource dataSource){
return new QueryRunner(dataSource);
}
@Bean(name="ds1")
public DataSource createDataSource(){
try {
ComboPooledDataSource ds = new ComboPooledDataSource();
ds.setDriverClass(driver);
ds.setJdbcUrl(url);
ds.setUser(username);
ds.setPassword(password);
return ds;
}catch (Exception e){
throw new RuntimeException(e);
}
}
@Bean(name="ds2")
public DataSource createDataSource2(){
try {
ComboPooledDataSource ds = new ComboPooledDataSource();
ds.setDriverClass(driver);
ds.setJdbcUrl(url);
ds.setUser(username);
ds.setPassword(password);
return ds;
}catch (Exception e){
throw new RuntimeException(e);
}
}
}
resources资源根目录下的jdbc.properties:
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/spring
jdbc.username=root
jdbc.password=root
测试类TestCRUD:
import com.zl.conf.SpringConfiguration;
import com.zl.domain.Account;
import com.zl.service.AccountService;
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;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = SpringConfiguration.class)
public class TestCRUD {
@Autowired
private AccountService service;
@Test
public void testFindAll(){
List accounts = service.findAll();
accounts.stream().forEach(System.out::println);
}
@Test
public void testFindById() {
Account account = service.findById(2);
System.out.println(account);
}
@Test
public void testSaveAaccount() {
Account account = new Account();
account.setName("zhangsan");
account.setMoney(5000f);
service.saveAccount(account);
}
@Test
public void testUpdateAccount() {
Account account = new Account();
account.setId(2);
account.setMoney(5000f);
account.setName("LR");
service.updateAccount(account);
}
@Test
public void testDeleteAccount() {
service.deleteAccount(4);
}
}
数据库:
create table account(
id int primary key auto_increment,
name varchar(40),
money float
)character set utf8 collate utf8_general_ci;
insert into account(name,money) values('aaa',1000);
insert into account(name,money) values('bbb',1000);
insert into account(name,money) values('ccc',1000);