Mybatisplus-plus 1.3.1新增在service层操作复合主键进行增删改查相关操作的功能。
**从中央库引入jar** ```` <dependency> <groupId>com.github.jeffreyning</groupId> <artifactId>mybatisplus-plus</artifactId> <version>1.3.1-RELEASE</version> </dependency> ````
在实例类成员变量上使用@MppMultiId表明联合主键
````
@TableName("test07")
public class Test07Entity {
@MppMultiId
@TableField(value = "k1")
private Integer k1;
@MppMultiId
@TableField(value = "k2")
private String k2;
@TableField(value = "col1")
private String col1;
@TableField(value = "col2")
private String col2;
````
mapper需要继承MppBaseMapper
````
@Mapper
public interface Test07Mapper extends MppBaseMapper<Test07Entity> {
}
````
````
service层继承IMppService
````
public interface Test07Service extends IMppService<Test07Entity> {
}
@Service
public class Test07ServiceImpl extends ServiceImpl<Test07Mapper, Test07Entity> implements Test07Service {
}
````
在service层调用多主键操作
````
public void testMultiIdService(){
//id
Test07Entity idEntity=new Test07Entity();
idEntity.setK1(1);
idEntity.setK2("111");
//del
test07Service.deleteByMultiId(idEntity);
//add
test07Service.save(idEntity);
//query
Test07Entity retEntity=test07Service.selectByMultiId(idEntity);
retEntity.setCol1("xxxx");
//update
test07Mapper.updateByMultiId(retEntity);
}
````
