写法1: public User queryUserByUsername(String username);
写法2: public User queryUserByUsername(@Param(value="username") String username);
写法1总是报莫名其妙的异常:
org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'username' in 'class java.lang.String'
### Cause: org.apache.ibatis.reflection.ReflectionException: There is no getter for property named 'username' in 'class java.lang.String'
......
感觉是因为没有指定参数的名称结果mybatis自动以一个默认的名字来进行反射注入,所以提示找不到对应的get和set方法
记得之前实习时候多参数也是必须指定参数名,否则顺序甚至有可能错乱
改成写法2 没有问题通过