100 lines
2.8 KiB
Markdown
100 lines
2.8 KiB
Markdown
# DB数据源
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## 配置数据源
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```properties
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redkale.datasource.platf.url = jdbc:mysql://127.0.0.1:3306/platf?serverTimezone=UTC&characterEncoding=utf8
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redkale.datasource.platf.user = root
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redkale.datasource.platf.password = pwd123
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```
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## 增删改
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```java
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@Data
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public class Account {
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//男
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public static final short GENDER_MALE = 1;
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//女
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public static final short GENDER_FEMALE = 2;
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@Id
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@Column(name = "account_id")
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private String accountid;
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@Column(name = "account_name")
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private String accountName;
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private int age;
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private short gender;
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private String remark;
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@Column(name = "create_time", updatable = false)
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private long createTime;
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}
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```
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  新增实体对象：
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```java
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//新增单个
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Account account = new Account();
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account.setAccountid("account1");
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account.setAccountName("Hello");
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account.setCreateTime(System.currentTimeMillis());
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source.insert(account);
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//异步新增多个
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Account a1 = new Account();
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a1.setAccountid("account1");
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a1.setAccountName("Hello1");
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a1.setCreateTime(System.currentTimeMillis());
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Account a2 = new Account();
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a2.setAccountid("account2");
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a2.setAccountName("Hello2");
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a2.setCreateTime(System.currentTimeMillis());
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source.insertAsync(a1, a2);
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```
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  修改实体对象：
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```java
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//更新单个字段
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source.updateColumn(Account.class, "account1", Account::getRemark, "新备注");
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//更新多个字段
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source.updateColumn(Account.class, "account1",
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ColumnValue.set(Account::getAccountName, "新名称"),
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ColumnValue.set(Account::getRemark, "新备注"),
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ColumnValue.inc(Account::getAge, 2)); //年龄+2
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//更新多个字段
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Account account = new Account();
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account.setAccountid("account1");
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account.setAccountName("新名称");
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account.setRemark("新备注");
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source.updateColumn(account, "accountName", "remark");
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//或者
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source.updateColumn(account, Account::getAccountName, Account::getRemark);
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//更新整个对象
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Account one = new Account();
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one.setAccountid("account1");
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one.setAccountName("Hello1");
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one.setCreateTime(System.currentTimeMillis());
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source.update(one); //createTime不会被更新，因字段设置了@Column(updatable=false)
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//过滤更新
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source.updateColumn(Account.class, FilterNodes.lt(Account::getAge, 16),
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ColumnValue.set(Account::getRemark, "不满16岁是青少年"));
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```
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  删除实体：
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```java
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//根据主键值删除
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Account account = new Account();
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account.setAccountid("account1");
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source.delete(account);
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//过滤删除， 删除16以下男生
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source.delete(Account.class, FilterNodes.lt(Account::getAge, 16).and("gender", GENDER_MALE));
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``` |