MyBatis基于注解----增删改查

select sysdate from dual;
--账户表
--账户编号,账户卡号,账户密码,账户余额,账户状态,创建时间
drop table account;
create table account
(
 id  number(10) primary key,
 account_number varchar2(50) not null,
 account_pwd varchar2(10) not null,
 account_money number(10,2) not null,
 account_status number(5) check(account_status in(0,1)),
 creation_time date default sysdate
);

--创建序列
drop sequence seq_account;
create sequence seq_account;

--添加数据
insert into account(
id,account_number,account_pwd,
account_money,account_status,creation_time
)
values
(seq_account.nextval,'6402211990052633201','123',
10.00,1,to_date('2010-08-09 12:12:12','yyyy-MM-dd hh24:mi:ss'));

insert into account(
id,account_number,account_pwd,
account_money,account_status,creation_time
)
values
(seq_account.nextval,'6402211990052633202','123',
20.00,1,to_date('2010-08-10 12:12:12','yyyy-MM-dd hh24:mi:ss'));

insert into account(
id,account_number,account_pwd,
account_money,account_status,creation_time
)
values
(seq_account.nextval,'6402211990052633203','123',
30.00,1,to_date('2010-08-11 12:12:12','yyyy-MM-dd hh24:mi:ss'));

insert into account(
id,account_number,account_pwd,
account_money,account_status,creation_time
)
values
(seq_account.nextval,'6402211990052633204','123',
40.00,1,to_date('2010-08-12 12:12:12','yyyy-MM-dd hh24:mi:ss'));

insert into account(
id,account_number,account_pwd,
account_money,account_status,creation_time
)
values
(seq_account.nextval,'6402211990052633205','123',
50.00,1,to_date('2010-08-13 12:12:12','yyyy-MM-dd hh24:mi:ss'));

insert into account(
id,account_number,account_pwd,
account_money,account_status,creation_time
)
values
(seq_account.nextval,'6402211990052633206','123',
60.00,1,to_date('2010-08-14 12:12:12','yyyy-MM-dd hh24:mi:ss'));

insert into account(
id,account_number,account_pwd,
account_money,account_status,creation_time
)
values
(seq_account.nextval,'6402211990052633207','123',
70.00,1,to_date('2010-08-15 12:12:12','yyyy-MM-dd hh24:mi:ss'));

select * from (select rownum r,a.* from account a where rownum<=6)t where t.r>3

select * from (select rownum r,a.* from account a where rownum<=#{endrow})t where t.r>#{startrow}

insert into account(id,account_number,account_pwd,account_money,account_status,creation_time) values(seq_account.nextval,#{account_number},#{account_pwd},#{account_money},#{account_status},#{creation_time});

update account set account_number=#{account_number},account_pwd=#{account_pwd},account_money=#{account_money},account_status=#{account_status},creation_time=#{creation_time} where id=#{id}

　　

3.在com.pojo包下创建Account.java类

public class Account {
	  private Integer id               ;
	  private String account_number   ;
	  private String account_pwd      ;
	  private Double account_money    ;
	  private Integer account_status   ;
	  private Date creation_time    ;

	public Account() {
		super();
	}

	public Account(String accountNumber, String accountPwd,
			Double accountMoney, Integer accountStatus, Date creationTime) {
		account_number = accountNumber;
		account_pwd = accountPwd;
		account_money = accountMoney;
		account_status = accountStatus;
		creation_time = creationTime;
	}

	public Account(Integer id, String accountNumber, String accountPwd,
			Double accountMoney, Integer accountStatus, Date creationTime) {
		super();
		this.id = id;
		account_number = accountNumber;
		account_pwd = accountPwd;
		account_money = accountMoney;
		account_status = accountStatus;
		creation_time = creationTime;
	}

	public Integer getId() {
		return id;
	}

	public void setId(Integer id) {
		this.id = id;
	}

	public String getAccount_number() {
		return account_number;
	}

	public void setAccount_number(String accountNumber) {
		account_number = accountNumber;
	}

	public String getAccount_pwd() {
		return account_pwd;
	}

	public void setAccount_pwd(String accountPwd) {
		account_pwd = accountPwd;
	}

	public Double getAccount_money() {
		return account_money;
	}

	public void setAccount_money(Double accountMoney) {
		account_money = accountMoney;
	}

	public Integer getAccount_status() {
		return account_status;
	}

	public void setAccount_status(Integer accountStatus) {
		account_status = accountStatus;
	}

	public Date getCreation_time() {
		return creation_time;
	}

	public void setCreation_time(Date creationTime) {
		creation_time = creationTime;
	}

	@Override
	public String toString() {
		return "Account [account_money=" + account_money + ", account_number="
				+ account_number + ", account_pwd=" + account_pwd
				+ ", account_status=" + account_status + ", creation_time="
				+ creation_time + ", id=" + id + "]";
	}

}

　　4.在com.page包下创建分页工具类PageUtil.java

public class PageUtil {
	private Integer pageno; //当前页
	private Integer pagesize; //页面大小
	private Integer totalcount; //同条数
	private Integer totalpage;  //同页数
	private Integer startrow;   //起始行
	private Integer endrow;     //结束行

	public PageUtil() {
	}

	/**
	 * 普通分页
	 * @param pageno
	 * @param pagesize
	 * @param totalcount
	 */
    public PageUtil(Integer pageno, Integer pagesize, Integer totalcount) {
    	this.pageno = pageno;
		this.pagesize = pagesize;
		this.startrow=(pageno-1)*pagesize;
		this.endrow=pageno*pagesize;
		this.totalcount = totalcount;
		this.setTotalpage(totalcount, pagesize);
	}

	public Integer getPageno() {
		return pageno;
	}

	public void setPageno(Integer pageno) {
		this.pageno = pageno;
	}

	public Integer getPagesize() {
		return pagesize;
	}

	public void setPagesize(Integer pagesize) {
		this.pagesize = pagesize;
	}

	public Integer getTotalcount() {
		return totalcount;
	}

	public void setTotalcount(Integer totalcount) {
		this.totalcount = totalcount;
	}

	public Integer getTotalpage() {
		return totalpage;
	}
   /**
    * 设置总页数
    * @param totalcount
    * @param pagesize
    */
	public void setTotalpage(Integer totalcount,Integer pagesize) {

		this.totalpage = totalcount%pagesize==0?totalcount/pagesize:totalcount/pagesize+1;
	}

	public Integer getStartrow() {
		return startrow;
	}

	public void setStartrow(Integer startrow) {
		this.startrow = startrow;
	}

	public Integer getEndrow() {
		return endrow;
	}

	public void setEndrow(Integer endrow) {
		this.endrow = endrow;
	}

}

　　5.在com.mapper包下创建数据访问层映射接口AccountMapper.java

public interface AccountMapper {
	/**
	 * 1.分页查询
	 * @param pageutil
	 * @return
	 */
	 @Select("select * from (select rownum r,a.* from account a where rownum<=#{endrow})t where t.r>#{startrow}")
	 List<Account> finaAll(PageUtil pageutil);
	 /**
	  * 2.根据id查询
	  * @param id
	  * @return
	  */
	 @Select("select * from account where id=#{id}")
	 Account findById(Integer id);
	 /**\
	  * 3.保存账户对象
	  * @param account
	  * @return
	  */
	 @Insert("insert into account(id,account_number,account_pwd,account_money,account_status,creation_time) values(seq_account.nextval,#{account_number},#{account_pwd},#{account_money},#{account_status},#{creation_time})")
	 Integer saveAccount(Account account);
	 /**\
	  * 4.修改对象
	  * @param account
	  * @return
	  */
	 @Update("update account set account_number=#{account_number},account_pwd=#{account_pwd},account_money=#{account_money},account_status=#{account_status},creation_time=#{creation_time} where id=#{id}")
	 Integer updateAccount(Account account);
	 /**
	  * 5.根据id删除
	  * @param id
	  * @return
	  */
	 @Delete("delete from account where id=#{id}")
	 Integer deleteById(Integer id);

}

　　

6.在src下创建数据库属性文件jdbc.properties
driver=oracle.jdbc.driver.OracleDriver
url=jdbc\:oracle\:thin\:@127.0.0.1\:1521\:orcl
username=****
password=****

　　7.在src下创建主配置文件mybatis-config.xml

<configuration>
  <properties resource="jdbc.properties"/>

  <environments default="development">
    <environment id="development">
       <transactionManager type="JDBC"/>
       <dataSource type="POOLED">
         <property name="driver" value="${driver}"/>
         <property name="url" value="${url}"/>
         <property name="username" value="${username}"/>
         <property name="password" value="${password}"/>
       </dataSource>
    </environment>
  </environments>

  <mappers>
    <mapper class="com.mapper.AccountMapper"/>
  </mappers>
</configuration>

　　8.在com.util包下创建获取SqlSession工具类MyBatisUtil.java

public class MyBatisUtil {
	private static SqlSessionFactory sqlSessionFactory=null;
	static{
		try {
			Reader reader=Resources.getResourceAsReader("mybatis-config.xml");
			sqlSessionFactory=new SqlSessionFactoryBuilder().build(reader);
		} catch (IOException e) {
			e.printStackTrace();
			System.out.println("解析xml文件或创建工厂出错!");
		}
	}
	/**
	 * 获取SqlSession对象
	 * @param isCommit
	 * @return
	 */
	public static SqlSession getSqlSession(boolean isCommit){
		return sqlSessionFactory.openSession(isCommit);
	}

}

　　9.在com.mapper包下创建数据访问层映射接口实现类AccountMapperImpl.java

public class AccountMapperImpl implements AccountMapper {
	private SqlSession sqlSession=MyBatisUtil.getSqlSession(true);
    private AccountMapper mapper=sqlSession.getMapper(AccountMapper.class);

	public Integer deleteById(Integer id) {
		return mapper.deleteById(id);
	}

	public List<Account> finaAll(PageUtil pageutil) {
		return mapper.finaAll(pageutil);
	}

	public Account findById(Integer id) {
		return mapper.findById(id);
	}

	public Integer saveAccount(Account account) {
		return mapper.saveAccount(account);
	}

	public Integer updateAccount(Account account) {
		return mapper.updateAccount(account);
	}

	public SqlSession getSqlSession() {
		return sqlSession;
	}

	public void setSqlSession(SqlSession sqlSession) {
		this.sqlSession = sqlSession;
	}

	public AccountMapper getMapper() {
		return mapper;
	}

	public void setMapper(AccountMapper mapper) {
		this.mapper = mapper;
	}

}

　　10.在com.test包下创建测试类Test.java

public class Test {
	public static void main(String[] args) {
		AccountMapper mapper=new AccountMapperImpl();
		System.out.println("---------------1.分页查询前三条:------------------");
		List<Account> list=mapper.finaAll(new PageUtil(1, 3, 7));
		for (Account account : list) {
			System.out.println(account);
		}

		System.out.println("---------------1.根据id查询第5条:------------------");
		Account account=mapper.findById(5);
		System.out.println(account);
	}

}