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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>第 46 章 Spring boot with lombok</title><link rel="stylesheet" type="text/css" href="../docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="home" href="../index.html" title="Netkiller Java 手札（版）" /><link rel="up" href="index.html" title="部分 IV. Spring Boot" /><link rel="prev" href="swagger/springfox.html" title="45.3. springfox" /><link rel="next" href="ch46s02.html" title="46.2. @Slf4j 注解" /></head><body><a xmlns="" href="//www.netkiller.cn/">Home</a> | <a xmlns="" href="//netkiller.github.io/">简体中文</a> | <a xmlns="" href="http://netkiller.sourceforge.net/">繁体中文</a> | <a xmlns="" href="/journal/index.html">杂文</a>
| <a xmlns="" href="https://github.com/netkiller">Github</a> | <a xmlns="" href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a> | <a xmlns="" href="https://www.facebook.com/bg7nyt">Facebook</a> | <a xmlns="" href="http://cn.linkedin.com/in/netkiller/">Linkedin</a> | <a xmlns="" href="https://www.youtube.com/user/bg7nyt/videos">Youtube</a> | <a xmlns="" href="//www.netkiller.cn/home/donations.html">打赏(Donations)</a> | <a xmlns="" href="//www.netkiller.cn/home/about.html">About</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">第 46 章 Spring boot with lombok</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="swagger/springfox.html">上一页</a> </td><th width="60%" align="center">部分 IV. Spring Boot</th><td width="20%" align="right"> <a accesskey="n" href="ch46s02.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=watch&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=fork&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&type=follow&count=true&size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td><td></td><td><a href="https://zhuanlan.zhihu.com/netkiller"><img src="/images/logo/zhihu-card-default.svg" height="25" /></a></td><td valign="middle"><a href="https://zhuanlan.zhihu.com/netkiller">知乎专栏</a></td><td></td><td></td><td></td><td></td></tr></table><div class="chapter"><div class="titlepage"><div><div><h2 class="title"><a id="lombok"></a>第 46 章 Spring boot with lombok</h2></div></div></div><div class="toc"><p><strong>目录</strong></p><dl class="toc"><dt><span class="section"><a href="lombok.html#id1117">46.1. @Builder</a></span></dt><dt><span class="section"><a href="ch46s02.html">46.2. @Slf4j 注解</a></span></dt></dl></div>
<pre class="screen">
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
</pre>
<p>常用的 lombok 注解:</p>
<pre class="programlisting">
@EqualsAndHashCode：实现equals()方法和hashCode()方法 @ToString：实现toString()方法
@Data ：注解在类上；提供类所有属性的 getting 和 setting 方法，此外还提供了equals、canEqual、hashCode、toString 方法
@Setter：注解在属性上；为属性提供 setting 方法
@Getter：注解在属性上；为属性提供 getting 方法
@Log4j ：注解在类上；为类提供一个 属性名为log 的 log4j 日志对象
@NoArgsConstructor：注解在类上；为类提供一个无参的构造方法
@AllArgsConstructor：注解在类上；为类提供一个全参的构造方法
@Cleanup：关闭流 @Synchronized：对象同步 @SneakyThrows：抛出异常
</pre>
<div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="id1117"></a>46.1. @Builder</h3></div></div></div>
<pre class="programlisting">
package cn.netkiller.graphql.domain;
import lombok.Builder;
import lombok.Data;
@Builder
@Data
public class Author {
private Integer id;
private String name;
private Integer age;
public Author() {
// TODO Auto-generated constructor stub
}
@Override
public String toString() {
return "Author [id=" + id + ", name=" + name + ", age=" + age + "]";
}
}
</pre>
<pre class="programlisting">
Author author = Author.builder().id(1).name("Neo Chen").age(40).build();
</pre>
</div>
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