1)添加lombok依賴ide
<dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency>
2)spa
@Slf4j//等同於 @Getter @Setter public class User { private String name; private Integer age; @Override public String toString() { // TODO Auto-generated method stub return "username: "+name+"age:"+age; } //lombok底層使用字節碼技術,ASM 幫你在內存中去修改字節碼文件,生成getset方法 //須要生成GetSet方法 public static void main(String[] args) { User user =new User(); user.setName("譚磊"); user.setAge(20); log.info("AAA"); System.out.println(user.toString()); } }