如何去除get，set方法。@Data注解和如何使用，lombok

主要的作用提高代码的简洁

@Data

去除一些重复的get,set方法，

1.需要官网下载jar包

https://projectlombok.org/download

2运行jar包，添加到eclipse目录下

点击install/update按钮，即可安装完成

检查eclipse.ini文件最后是否添加了jar包

3然后重启一下eclipse,

4最重要的是需要在maven中引入

org.projectlombok

lombok

1.16.6

比较一下：

原来的代码

public class EnergySource {

    private String energySourceId;
    private String fuel;
    private String industrialWater;
    private String gas;
    private String naturlGas;
    private String steam;
    private String oxygenNitrogen;
    private String compressedAir;
    private String dynamicMedium;
    public String getEnergySourceId() {
        return energySourceId;
    }
    public String getFuel() {
        return fuel;
    }
    public String getIndustrialWater() {
        return industrialWater;
    }
    public String getGas() {
        return gas;
    }
    public String getNaturlGas() {
        return naturlGas;
    }
    public String getSteam() {
        return steam;
    }
    public String getOxygenNitrogen() {
        return oxygenNitrogen;
    }
    public String getCompressedAir() {
        return compressedAir;
    }
    public String getDynamicMedium() {
        return dynamicMedium;
    }
    public void setEnergySourceId(String energySourceId) {
        this.energySourceId = energySourceId;
    }
    public void setFuel(String fuel) {
        this.fuel = fuel;
    }
    public void setIndustrialWater(String industrialWater) {
        this.industrialWater = industrialWater;
    }
    public void setGas(String gas) {
        this.gas = gas;
    }
    public void setNaturlGas(String naturlGas) {
        this.naturlGas = naturlGas;
    }
    public void setSteam(String steam) {
        this.steam = steam;
    }
    public void setOxygenNitrogen(String oxygenNitrogen) {
        this.oxygenNitrogen = oxygenNitrogen;
    }
    public void setCompressedAir(String compressedAir) {
        this.compressedAir = compressedAir;
    }
    public void setDynamicMedium(String dynamicMedium) {
        this.dynamicMedium = dynamicMedium;
    }
    @Override
    public String toString() {
        return "EnergySource [energySourceId=" + energySourceId + ", fuel=" + fuel + ", industrialWater="
                + industrialWater + ", gas=" + gas + ", naturlGas=" + naturlGas + ", steam=" + steam
                + ", oxygenNitrogen=" + oxygenNitrogen + ", compressedAir=" + compressedAir + ", dynamicMedium="
                + dynamicMedium + "]";
    }

}

加注解的代码

import lombok.Data;

@Data
public class EnergySource {

    private String energySourceId;
    private String fuel;
    private String industrialWater;
    private String gas;
    private String naturlGas;
    private String steam;
    private String oxygenNitrogen;
    private String compressedAir;
    private String dynamicMedium;

}

还有一些提供的注解：

        @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