【译】利用Lombok消除重复代码

<dependencies>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.4</version>
        <scope>provided</scope>
    </dependency>
</dependencies>

plugins {
    id 'io.franzbecker.gradle-lombok' version '1.14'
    id 'java'
}

import lombok.Getter;
import lombok.Setter;

class UptimeResponse {
    // GetXXX and SetXXX are automatically generated
    @Getter @Setter private long uptime;
    @Getter @Setter private long currentTime;
    @Getter @Setter private String status;
    UptimeResponse() {
        this.uptime = ManagementFactory
                          .getRuntimeMXBean().getUptime();
        this.currentTime = System.currentTimeMillis();
        this.status = "OK";
    }
}
// So this works automagically
UptimeResponse res = new UptimeResponse();
res.setStatus("FAIL");
System.out.println(res.getUptime());

import lombok.*

@AllArgsConstructor
class Document {
    @Getter @Setter private String title;
    @Getter @Setter private String content;
    // ...
}
// This works automagically
Document d = new Document("Hello World", "Message Body");
d.getTitle();   // Hello World
d.getContent(); // Message Body

import lombok.*;

@RequiredArgsConstructor
@EqualsAndHashCode
class User {
    @Getter
    private final String username;
    @EqualsAndHashCode.Exclude
    @Getter
    @Setter
    private String lastAction;  // not required for equality checks
}
// This works automagically
User u1 = new User("amitosh");
u1.setLastAction("Hello");
User u2 = new User("amitosh");
u2.setLastAction("Compile");
u1.equals(u2) // Gives true

import lombok.ToString;
import lombok.Getter;
import lombok.Setter;

@ToString
class Entry {
    @Getter @Setter private String id;
    @Getter @Setter private String target;
}
// This works automagically
Entry e = new Entry();
// ...
System.out.println(e);  // Nice output with values of id and target

import lombok.Data;

@Data
class Message {
    private String sender;
    private String content;
}
// This works automagically
Message m = new Message("amitosh", "Hello World");
m.setSender("agathver");
m.getContent();  // Hello World
m.toString();    // ...

import lombok.SneakyThrows;

public class SneakyThrowsExample {
   @SneakyThrows(UnsupportedEncodingException.class)
   public String utf8ToString(byte[] bytes) {
       // This exception is never generated as UTF-8 is guaranteed
       // to be supported by the JVM
       return new String(bytes, "UTF-8");
   }
}

java -jar lombok.jar delombok src -d src-delomboked