eclipse环境下：lombok安装及使用

lombok官网：https://projectlombok.org/
jar包下载路径：https://projectlombok.org/download
lombok features：https://projectlombok.org/features/all

lombok：通过注解方式减少POJO类的getter和setter等方法来消除冗余代码量

安装
1.下载 lombok.jar
2.官网说是可以双击安装，，，我用这种方法不可行
2.手动安装
（1）将lombok.jar移到eclipse的安装目录

（2）在eclipse.in文件最后加入下面两行

-Xbootclasspath/a:lombok.jar
-javaagent:lombok.jar

=============
-javaagent:xxx.jar 的jar名称 需要与根目录下的jar名一致，
不一致，可能会出现eclipse无法启动的情况。

（3）重启eclipse，进行代码测试

原始java代码：

public class NoteTest {

    private int noteId;
    private String title; private String content; private int typeId; }

class文件反编译后：

public class NoteTest
{

    private int noteId;
    private String title; private String content; private int typeId; public NoteTest() { 

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加入lombok注解后的java代码：

@Data
@NoArgsConstructor
@AllArgsConstructor
@ToString(exclude="typeId") public class NoteTest { private int noteId; private String title; private String content; private int typeId; }

加注解，经反编译：

public class NoteTest
{

    private int noteId; private String title; private String content; private int typeId; public int getNoteId() { return noteId; } public String getTitle() { return title; } public String getContent() { return content; } public int getTypeId() { return typeId; } public void setNoteId(int noteId) { this.noteId = noteId; } public void setTitle(String title) { this.title = title; } public void setContent(String content) { this.content = content; } public void setTypeId(int typeId) { this.typeId = typeId; } public boolean equals(Object o) { if (o == this) return true; if (!(o instanceof NoteTest)) return false; NoteTest other = (NoteTest)o; if (!other.canEqual(this)) return false; if (getNoteId() != other.getNoteId()) return false; Object this$title = getTitle(); Object other$title = other.getTitle(); if (this$title != null ? !this$title.equals(other$title) : other$title != null) return false; Object this$content = getContent(); Object other$content = other.getContent(); if (this$content != null ? !this$content.equals(other$content) : other$content != null) return false; return getTypeId() == other.getTypeId(); } protected boolean canEqual(Object other) { return other instanceof NoteTest; } public int hashCode() { int PRIME = 59; int result = 1; result = result * 59 + getNoteId(); Object $title = getTitle(); result = result * 59 + ($title != null ? $title.hashCode() : 43); Object $content = getContent(); result = result * 59 + ($content != null ? $content.hashCode() : 43); result = result * 59 + getTypeId(); return result; } public NoteTest() { } public NoteTest(int noteId, String title, String content, int typeId) { this.noteId = noteId; this.title = title; this.content = content; this.typeId = typeId; } public String toString() { return (new StringBuilder("NoteTest(noteId=")).append(getNoteId()).append(", title=").append(getTitle()).append(", content=").append(getContent()).append(")").toString(); } }