Lombok是一款提高javaer开发效率的插件工具，特别是在繁多是bean类中的getter、setter，使用Lombok可以使用注解的方式省去了添加getter、setter的时间
在使用Lombok之前，需要在IDE上安装插件，eclipse安装步骤稍微多一点，具体请自行百度或者去官方查看https://projectlombok.org/features/configuration，IntelliJ安装就相对来说比较方便，直接在插件中心搜索Lombok,安装Lombok Plugin即可。
接下来，我们在程序中引入jar包：
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| <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.10</version>
<scope>provided</scope>
</dependency>
|
我们平时的POJO类一般都是这样写:
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| public class DataFileDownloadAudit {
private Timestamp startTime;
private String userName;
private String operator;
private String source;
private String displayName;
private String filePath;
private long fileSize;
private String creator;
private Timestamp createTime;
public DataFileDownloadAudit() {
}
public String getUserName() {
return this.userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getOperator() {
return this.operator;
}
public void setOperator(String operator) {
this.operator = operator;
}
public String getSource() {
return this.source;
}
public void setSource(String source) {
this.source = source;
}
public String getDisplayName() {
return this.displayName;
}
public void setDisplayName(String displayName) {
this.displayName = displayName;
}
public String getFilePath() {
return this.filePath;
}
public void setFilePath(String filePath) {
this.filePath = filePath;
}
public String getCreator() {
return this.creator;
}
public void setCreator(String creator) {
this.creator = creator;
}
public Timestamp getStartTime() {
return this.startTime;
}
public void setStartTime(Timestamp startTime) {
this.startTime = startTime;
}
public Timestamp getCreateTime() {
return this.createTime;
}
public void setCreateTime(Timestamp createTime) {
this.createTime = createTime;
}
public long getFileSize() {
return this.fileSize;
}
public void setFileSize(long fileSize) {
this.fileSize = fileSize;
}
}
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如果属性更多的话，添加getter、setter就需要花更多的时间。如果使用Lombok插件的话，不仅可以节省时间，而且代码也更加简洁:
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| public class DataFileDownloadAudit {
@Setter(AccessLevel.PUBLIC)
@Getter(AccessLevel.PROTECTED)
private Timestamp startTime;
@Setter(AccessLevel.PUBLIC)
@Getter(AccessLevel.PROTECTED)
private String userName;
private String operator;
private String source;
private String displayName;
private String filePath;
private long fileSize;
private String creator;
private Timestamp createTime;
public DataFileDownloadAudit() {
}
}
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这样只是给属性加getter、setter，我们也可以用@Data来继续简化:
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| @Data
public class DataFileDownloadAudit {
private Timestamp startTime;
private String userName;
private String operator;
private String source;
private String displayName;
private String filePath;
private long fileSize;
private String creator;
private Timestamp createTime;
}
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这两种方式有什么差异呢？@Getter和@Setter是作用在bean属性上，可以自动生成getter、setter方法，@Data是作用在类上，他结合了@ToString, @EqualsAndHashCode, @Getter,@Setter,@RequiredArgsConstructor注解的功能。
这仅仅说了Lombok两个常用的注解，总的来说，它会给我们带来更加简洁的代码和快速的开发效率，其他更加强大的功能可以去https://projectlombok.org/features/all自行查看。
