mybatis入门之简单操作
2017-11-20 19:32
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mybatis入门之简单操作
环境配置
1.准备jar包
2.编写配置文件
SqlMapConfig.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <environments default="developement"> <environment id="developement"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf8"/> <property name="username" value="root"/> <property name="password" value="root"/> </dataSource> </environment> </environments> <mappers>
<mapper resource="com/zrf/mybatis/config/sqlmap/UserMapper.xml"/> </mappers> </configuration>
1.根据用户id查询用户
实体bean
public class User {
private Integer id;
private String username;
private Date birthday;
private String sex;
private String address;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public User() {
}
public User(Integer id, String username, Date birthday, String sex,
String address) {
super();
this.id = id;
this.username = username;
this.birthday = birthday;
this.sex = sex;
this.address = address;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", birthday="
+ birthday + ", sex=" + sex + ", address=" + address + "]";
}mapper配置文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="user">
<select id="findUserById" parameterType="int" resultType="com.zrf.mybatis.bean.User">
select * from user where id=#{id}
</select>
</mapper>测试类
public class Test {
public static void main(String[] args) {
String resource="com/zrf/mybatis/config/SqlMapConfig.xml";
try {
InputStream input=Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(input);
SqlSession sqlSession=sqlSessionFactory.openSession();
User user=sqlSession.selectOne("user.findUserById", 24);
System.out.println(user);
} catch (IOException e) {
e.printStackTrace();
}
}运行结果
2.根据用户名称模糊查询用户
实体bean
public class User {
private Integer id;
private String username;
private Date birthday;
private String sex;
private String address;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public User() {
}
public User(Integer id, String username, Date birthday, String sex,
String address) {
super();
this.id = id;
this.username = username;
this.birthday = birthday;
this.sex = sex;
this.address = address;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", birthday="
+ birthday + ", sex=" + sex + ", address=" + address + "]";
}mapper文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="user">
<select id="findUserByName" parameterType="java.lang.String" resultType="com.zrf.mybatis.bean.User">
select * from user where username like '%${value}%'
</select>
</mapper>测试类public class Test {
public static void main(String[] args) {
String resource="com/zrf/mybatis/config/SqlMapConfig.xml";
try {
InputStream inputStream=Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
SqlSession sqlSession =sqlSessionFactory.openSession();
List<User>userList=sqlSession.selectList("user.findUserByName", "小明");
System.out.println(userList);
sqlSession.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}运行结果
3.修改用户
public class User {
private Integer id;
private String username;
private Date birthday;
private String sex;
private String address;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public User() {
}
public User(Integer id, String username, Date birthday, String sex,
String address) {
super();
this.id = id;
this.username = username;
this.birthday = birthday;
this.sex = sex;
this.address = address;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", birthday="
+ birthday + ", sex=" + sex + ", address=" + address + "]";
}mapper配置文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="user">
<update id="updateUser">
update user set
username=#{username},birthday=#{birthday},sex=#{sex},address=#{address}
where id=#{id}
</update>
</mapper>测试类
public class Test {
public static void main(String[] args) {
String resource="com/zrf/mybatis/config/SqlMapConfig.xml";
try {
InputStream inputStream=Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
SqlSession sqlSession=sqlSessionFactory.openSession();
User user=new User();
user.setId(29);
user.setUsername("王大军");
user.setBirthday(new Date());
user.setSex("2");
user.setAddress("甘肃平凉");
sqlSession.update("user.updateUser", user);
sqlSession.commit();
sqlSession.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}4.删除用户
public class User {
private Integer id;
private String username;
private Date birthday;
private String sex;
private String address;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public User() {
}
public User(Integer id, String username, Date birthday, String sex,
String address) {
super();
this.id = id;
this.username =
b4cb
username;
this.birthday = birthday;
this.sex = sex;
this.address = address;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", birthday="
+ birthday + ", sex=" + sex + ", address=" + address + "]";
}mapper配置文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="user">
<delete id="deleteUser" parameterType="java.lang.Integer">
delete from user where id=#{id}
</delete>
</mapper>测试类
public class Test {
public static void main(String[] args) {
String resource="com/zrf/mybatis/config/SqlMapConfig.xml";
try {
InputStream inputStream =Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
SqlSession sqlSession =sqlSessionFactory.openSession();
sqlSession.delete("user.deleteUser", 28);
sqlSession.commit();
sqlSession.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
5.添加用户
实体beanpublic class User {
private Integer id;
private String username;
private Date birthday;
private String sex;
private String address;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public User() {
}
public User(Integer id, String username, Date birthday, String sex,
String address) {
super();
this.id = id;
this.username = username;
this.birthday = birthday;
this.sex = sex;
this.address = address;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", birthday="
+ birthday + ", sex=" + sex + ", address=" + address + "]";
}配置文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="user">
<insert id="insertUser" parameterType="com.zrf.mybatis.bean.User">
insert into user(username,birthday,sex,address)value(#{username},#{birthday},#{sex},#{address})
</insert>
</mapper>测试类
public class Test {
public static void main(String[] args) {
String resource="com/zrf/mybatis/config/SqlMapConfig.xml";
try {
InputStream inputStream=Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
SqlSession sqlSession=sqlSessionFactory.openSession();
User user=new User();
user.setUsername("王小军");
user.setBirthday(new Date());
user.setSex("1");
user.setAddress("河南郑州");
sqlSession.insert("user.insertUser", user);
sqlSession.commit();
sqlSession.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
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