不能从类型Officer对非静态方法getUnit_id()进行静态引用

Question

我正在尝试插入以下代码中的值：

public int create(Officer officer) {
     String sql = "insert into officer values(" + officer.getOfficer_id() + ", " + officer.getCollege_id() + ", " + Officer.getUnit_id() + ", " + officer.getRole_id() + ")";
     return template.update(sql);
}

Answer 1

这应该是一个编译错误。getUnit_id不是静态方法，因此您需要使用Officer的实例来调用它。

public int create(Officer officer) { String sql = "insert into officer values(" + officer.getOfficer_id() + ", " + officer.getCollege_id() + ", " + officer.getUnit_id() + ", " + officer.getRole_id() + ")"; return template.update(sql); }