手机模板网站模板下载网站有哪些内容,做 爱 网站视频短片,模拟建筑4,蓝色创新业务功能展示网页模板1.在idea中配置好数据源
2、视频案例中只给出了查询所有结果的示例#xff0c;请自己完成添加、删除、修改操作的代码。以下供参
考。 Delete(delete from emp where id#{id}) public void delete(Integer id);
测试代码 Test public void testDelete(){ empMa…1.在idea中配置好数据源
2、视频案例中只给出了查询所有结果的示例请自己完成添加、删除、修改操作的代码。以下供参
考。 Delete(delete from emp where id#{id}) public void delete(Integer id);
测试代码 Test public void testDelete(){ empMapper.delete(17); } Insert(insert into emp(username, name, gender, image, job, entrydate, dept_id, create_time, update_time) values (#{username},#{name},#{gender},#{image},#{job},#{entrydate},#{deptId},#{createTime},#{updateTime}))
public void insert(Emp emp);
测试代码
Test public void testInsert(){ Emp empnew Emp(); emp.setUsername(Tom); emp.setName(汤姆); emp.setImage(1.jpg); emp.setGender((short)1); emp.setJob((short)1); emp.setEntrydate(LocalDate.of(2000,1,1)); emp.setCreateTime(LocalDateTime.now()); emp.setUpdateTime(LocalDateTime.now()); emp.setDeptId(1);
empMapper.insert(emp); } Update(update emp set username#{username},name#{name},gender#{gender}, image#{image},job#{job},entrydate#{entrydate},dept_id#{deptId},update_time#{updateTime} where id#{id})
public void update(Emp emp);
测试代码 Test public void testUpdate(){ Emp empnew Emp(); emp.setId(17); emp.setUsername(Tom1); emp.setName(汤姆1); emp.setImage(1.jpg); emp.setGender((short)1); emp.setJob((short)1); emp.setEntrydate(LocalDate.of(2000,1,1)); emp.setUpdateTime(LocalDateTime.now()); emp.setDeptId(1); empMapper.update(emp); } Select(select * from emp where name like %${name}% and gender #{gender} and entrydate between #{begin} and #{end} order by update_time desc) public ListEmp list(String name, Short gender, LocalDate begin,LocalDate end);
测试代码 Test public void testList(){ empMapper.list(张,(short)1,LocalDate.of(2010,1,1),LocalDate.of(2020,1,1)); System.out.println(empList); } 3、lombok库的使用。尝试将实体类采用注解的方式来实现。
import lombok.*;
//Getter
//Setter
//ToString
//EqualsAndHashCode
Data
NoArgsConstructor
AllArgsConstructor
public class User { private Integer id; private String name; private Short age; private Short gender; private String phone; 4、学习idea的调试技巧并尝试使用。 5、对以下案例使用mybatis进行添加、删除、修改、更新的操作。
Mapper
public interface PoetMapper { Delete(delete from poet where id#{id}) public void delete(Integer id); Insert(insert into poet(name,gender,dynasty,title,style) values (#{name},#{gender},#{dynasty},#{title},#{style})) public void insert(Poet poet); Update(update poet set name#{name},gender#{gender}, dynasty#{dynasty},title#{title},style#{style} where id#{id}) public void update(Poet poet);
}
测试代码
SpringBootTest
class SpringbootMybatisCrudApplicationTests { Autowired private PoetMapper poetMapper; Test public void testInsert(){ Poet poetnew Poet(); poet.setName(汤姆); poet.setGender((short)1); poet.setDynasty(元代); poet.setTitle(诗词爱好者); poet.setStyle(无); poetMapper.insert(poet); } Test public void testDelete(){ poetMapper.delete(7); } Test public void testUpdate(){ Poet poetnew Poet(); poet.setId(18); poet.setName(汤姆1); poet.setGender((short)1); poet.setDynasty(清代); poet.setTitle(无); poet.setStyle(无); poetMapper.update(poet); }
