真会玩！竟然可以这样用IDEA通过数据库生成lombok版的POJO…

import com.intellij.database.model.DasTable

import com.intellij.database.util.Case

import com.intellij.database.util.DasUtil




import java.time.LocalDate




/*

 * Available context bindings:

 *   SELECTION   Iterable

 *   PROJECT     project

 *   FILES       files helper

 */




// 此处指定包路径，路径需要自行维护;

packageName = "com.xxx.xxx.entity;"

// 此处指定对应的类型映射，可按需修改，目前tinyint如果要映射到自定义枚举类型，只能手动修改

typeMapping = [

        (~/(?i)bigint/)                   : "Long",

        (~/(?i)int/)                      : "Integer",

        (~/(?i)tinyint/)                  : "Boolean",

        (~/(?i)float|double|decimal|real/): "BigDecimal",

        (~/(?i)time|datetime|timestamp/)  : "LocalDateTime",

        (~/(?i)date/)                     : "LocalDate",

        (~/(?i)/)                         : "String"

]




// 上面用到类和它的导入路径的之间的映射

importMap = [

        "BigDecimal" : "java.math.BigDecimal",

        "LocalDate" : "java.time.LocalDate",

        "LocalDateTime" : "java.time.LocalDateTime",

]




// 导入路径列表，下面引用的时候会去重，也可以直接声明成一个 HashSet

importList = []




// 基类中已经有的属性，就无需在新生成的类中声明了

userTimeList = [

        "create_user_id",

        "update_user_id",

        "create_time",

        "update_time"

]




// 弹出选择文件的对话框

FILES.chooseDirectoryAndSave("Choose directory", "Choose where to store generated files") { dir ->

    SELECTION.filter { it instanceof DasTable }.each { generate(it, dir) }

}




def generate(table, dir) {

    def className = javaName(table.getName(), true) + "PO"

    def writer = new PrintWriter(new OutputStreamWriter(new FileOutputStream(new File(dir, className + ".java")), "utf-8"))

    def fields = calcFields(table)

    writer.withPrintWriter { out -> generate(out, className, fields, table) }

}




// 从这里开始，拼实体类的具体逻辑代码

def generate(out, className, fields, table) {

    out.println "package $packageName"

    out.println ""

    out.println ""

    // 引入所需的包

    out.println "import com.xxx.xxx.entity.BaseEntity;"

    out.println "import lombok.Data;"

    out.println "import lombok.EqualsAndHashCode;"

    out.println "import java.io.Serializable;"

    out.println "import javax.persistence.Id;"

    out.println "import javax.persistence.Table;"

    out.println "import javax.persistence.GeneratedValue;"

    // 去重后导入列表

    importList.unique().each() { pkg ->

        out.println "import " + pkg + ";"

    }

    out.println ""

    // 添加类注释

    out.println "/**"

    // 如果添加了表注释，会加到类注释上

    if (isNotEmpty(table.getComment())) {

        out.println " * " + table.getComment()

    }

    out.println " *"

    out.println " * @author xxx"

    out.println " * @date " + LocalDate.now()

    out.println " */"

    // 添加类注解

    out.println "@Data"

    out.println "@EqualsAndHashCode(callSuper = false)"

    out.println "@Table(name = \"${table.getName()}\")"

    out.println "public class $className extends BaseEntity implements Serializable {"

    out.println ""

    boolean isId = true

    // 遍历字段，按下面的规则生成

    fields.each() {

        // 输出注释

        if (isNotEmpty(it.comment)) {

            out.println "\t/**"

            out.println "\t * ${it.comment}"

            out.println "\t */"

        }

        // 这边默认第一个字段为主键，实际情况大多数如此，遇到特殊情况可能需要手动修改

        if (isId) {

            out.println "\t@Id"

            out.println "\t@GeneratedValue(generator = \"JDBC\")"

            isId = false

        }

        out.println "\tprivate ${it.type} ${it.name};"

        out.println ""

    }

    out.println "}"

}




def calcFields(table) {

    DasUtil.getColumns(table).reduce([]) { fields, col ->

        def spec = Case.LOWER.apply(col.getDataType().getSpecification())

        def typeStr = typeMapping.find { p, t -> p.matcher(spec).find() }.value

        // 如果是BaseTimeUserIdPO中已有的字段，则不再添加

        if (!userTimeList.contains(col.getName())) {

            // 如果是需要导入的类型，则往list里面添加

            if (importMap.containsKey(typeStr)) {

                importList.add(importMap.get(typeStr))

            }

            fields += [[

                               name   : javaName(col.getName(), false),

                               type   : typeStr,

                               dbType : col.getDataType(),

                               comment: col.getComment()

                       ]]

        } else {

            fields += []

        }

    }

}




def isNotEmpty(content) {

    return content != null && content.toString().trim().length() > 0

}




def javaName(str, capitalize) {

    def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)

            .collect { Case.LOWER.apply(it).capitalize() }

            .join("")

            .replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_")

    capitalize || s.length() == 1 ? s : Case.LOWER.apply(s[0]) + s[1..-1]

}