Intellij IDEA 安装 lombok （本地安装/在线安装）及使用详解

一 本地安装lombok
 

1.下载安装lombok zip包

下载地址：https://github.com/mplushnikov/lombok-intellij-plugin/releases

2.下载好后放在任意盘下

3.进入 file->settings -> idea Annotation processors

勾选

4.进入 Plugins - >Install plugin from disk…

选择下载的zip包

5.选择后点击ok，然后重启idea即可

二 在线安装lombok

1.进入 file->settings -> Plugins

5.结束后重启idea即可

三 lombok的使用

1.pom文件加入

1. <dependency>
2. <groupId>org.projectlombok</groupId>
3. <artifactId>lombok</artifactId>
4. <version>1.18.4</version>
5. </dependency>

2.@Data 注解

@Data注解在类上，会为类的所有属性自动生成setter/getter、equals、canEqual、hashCode、toString方法，如为final属性，则不会为该属性生成setter方法。

官方实例如下：

1. import lombok.AccessLevel;
2. import lombok.Setter;
3. import lombok.Data;
4. import lombok.ToString;
5. @Data
6. public class DataExample {
7. private final String name;
8. @Setter(AccessLevel.PACKAGE) private int age;
9. private double score;
10. private String[] tags;
11. @ToString(includeFieldNames=true)
12. @Data(staticConstructor="of")
13. public static class Exercise<T> {
14. private final String name;
15. private final T value;
16. }
17. }

如不使用Lombok，则实现如下：

1. import java.util.Arrays;
2.  
3. public class DataExample {
4. private final String name;
5. private int age;
6. private double score;
7. private String[] tags;
8.  
9. public DataExample(String name) {
10. this.name = name;
11. }
12.  
13. public String getName() {
14. return this.name;
15. }
16.  
17. void setAge(int age) {
18. this.age = age;
19. }
20.  
21. public int getAge() {
22. return this.age;
23. }
24.  
25. public void setScore(double score) {
26. this.score = score;
27. }
28.  
29. public double getScore() {
30. return this.score;
31. }
32.  
33. public String[] getTags() {
34. return this.tags;
35. }
36.  
37. public void setTags(String[] tags) {
38. this.tags = tags;
39. }
40.  
41. @Override public String toString() {
42. return "DataExample(" + this.getName() + ", " + this.getAge() + ", " + this.getScore() + ", " + Arrays.deepToString(this.getTags()) + ")";
43. }
44.  
45. protected boolean canEqual(Object other) {
46. return other instanceof DataExample;
47. }
48.  
49. @Override public boolean equals(Object o) {
50. if (o == this) return true;
51. if (!(o instanceof DataExample)) return false;
52. DataExample other = (DataExample) o;
53. if (!other.canEqual((Object)this)) return false;
54. if (this.getName() == null ? other.getName() != null : !this.getName().equals(other.getName())) return false;
55. if (this.getAge() != other.getAge()) return false;
56. if (Double.compare(this.getScore(), other.getScore()) != 0) return false;
57. if (!Arrays.deepEquals(this.getTags(), other.getTags())) return false;
58. return true;
59. }
60.  
61. @Override public int hashCode() {
62. final int PRIME = 59;
63. int result = 1;
64. final long temp1 = Double.doubleToLongBits(this.getScore());
65. result = (result*PRIME) + (this.getName() == null ? 43 : this.getName().hashCode());
66. result = (result*PRIME) + this.getAge();
67. result = (result*PRIME) + (int)(temp1 ^ (temp1 >>> 32));
68. result = (result*PRIME) + Arrays.deepHashCode(this.getTags());
69. return result;
70. }
71.  
72. public static class Exercise<T> {
73. private final String name;
74. private final T value;
75.  
76. private Exercise(String name, T value) {
77. this.name = name;
78. this.value = value;
79. }
80.  
81. public static <T> Exercise<T> of(String name, T value) {
82. return new Exercise<T>(name, value);
83. }
84.  
85. public String getName() {
86. return this.name;
87. }
88.  
89. public T getValue() {
90. return this.value;
91. }
92.  
93. @Override public String toString() {
94. return "Exercise(name=" + this.getName() + ", value=" + this.getValue() + ")";
95. }
96.  
97. protected boolean canEqual(Object other) {
98. return other instanceof Exercise;
99. }
100.  
101. @Override public boolean equals(Object o) {
102. if (o == this) return true;
103. if (!(o instanceof Exercise)) return false;
104. Exercise<?> other = (Exercise<?>) o;
105. if (!other.canEqual((Object)this)) return false;
106. if (this.getName() == null ? other.getValue() != null : !this.getName().equals(other.getName())) return false;
107. if (this.getValue() == null ? other.getValue() != null : !this.getValue().equals(other.getValue())) return false;
108. return true;
109. }
110.  
111. @Override public int hashCode() {
112. final int PRIME = 59;
113. int result = 1;
114. result = (result*PRIME) + (this.getName() == null ? 43 : this.getName().hashCode());
115. result = (result*PRIME) + (this.getValue() == null ? 43 : this.getValue().hashCode());
116. return result;
117. }
118. }