自定义Generate POJOs.groovy

Intellij IDEA 通过数据库表逆向生成带注释的实体类文件（Generate POJOs.groovy）

生成JPA实体文件，生成的代码如下：

import lombok.Data;
import javax.persistence.*;
import java.io.Serializable;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;

@Table ( name ="image" )
@Data
@ApiModel
public class Image  implements Serializable{

private static final long serialVersionUID = 1L;

  @Id
  @Column(name = "id" )
  @ApiModelProperty( value="id")
  private String id;

  @Column(name = "entity_id" )
  @ApiModelProperty( value="实体id-可关联作业单")
  private String entity_id;

  @Column(name = "image_name" )
  @ApiModelProperty( value="图片名称")
  private String image_name;

  @Column(name = "image_path" )
  @ApiModelProperty( value="图片路径")
  private String image_path;

  @Column(name = "create_time" )
  @ApiModelProperty( value="创建时间")
  private java.util.Date create_time;

  @Column(name = "update_time" )
  @ApiModelProperty( value="修改时间")
  private java.util.Date update_time;

}

Generate POJOs.groovy 内容如下

import com.intellij.database.model.DasTable
import com.intellij.database.model.ObjectKind
import com.intellij.database.util.Case
import com.intellij.database.util.DasUtil

import java.time.LocalDateTime
import java.time.format.DateTimeFormatter

/*
 * Available context bindings:
 *   SELECTION   Iterable
 *   PROJECT     project
 *   FILES       files helper
 *   update by yitianRen 20200324
 */

packageName = "com.nimble.ydtb.api.entity;"
typeMapping = [
        (~/(?i)int/)                      : "Integer",  //数据库类型和Jave类型映射关系
        (~/(?i)float|double|decimal|real/): "Double",
        (~/(?i)bool|boolean/)             : "Boolean",
        (~/(?i)datetime|timestamp/)       : "java.util.Date",
        (~/(?i)date/)                     : "java.sql.Date",
        (~/(?i)time/)                     : "java.sql.Time",
        (~/(?i)/)                         : "String"
]

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)
  def fields = calcFields(table)//更改实体生成规则
  new File(dir, className + ".java").withPrintWriter { out -> generate(out, className, fields, table) }//输出实体类
}

def generate(out, className, fields, table) {
  out.println "package $packageName"
  out.println ""
  out.println "/**\n" +
          " *  \n" +
          " * 
@Date: " + LocalDateTime.now().format(DateTimeFormatter.ofPattern("yy-MM-dd HH:mm:ss")).toString() + ".
\n" +
          " *\n" +
          " * @author linqh03\n" +
          " */"
  out.println ""
  out.println "import lombok.Data;"
  out.println "import javax.persistence.*;"
  out.println "import java.io.Serializable;"
  out.println "import io.swagger.annotations.ApiModel;"
  out.println "import io.swagger.annotations.ApiModelProperty;"
  out.println ""
  out.println "@Table ( name =\"" + table.getName() + "\" )"
  out.println "@Data"
  out.println "@ApiModel"
  out.println "public class $className  implements Serializable{"
  out.println ""
  out.println "private static final long serialVersionUID = 1L;"
  fields.each() {
    out.println ""
    // 输出注释  这里和下面的 comm是一一对应的
/*    if (isNotEmpty(it.commoent)) {//定义非空校验，it.commoent ！= ""手写无效
      out.println "// ${it.commoent}"
    }*/
    if (it.name == "id") out.println "  @Id"
    if (it.annos != "") out.println "  ${it.annos}"
    out.println "  @ApiModelProperty( value=\"${it.commoent}\")"
    out.println "  private ${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
    def comm = [
            name : col.getName(),
            type : typeStr,
            commoent: col.getComment(),
            annos: "@Column(name = \"" + col.getName() + "\" )"
    ]
    //对于表中主键自定义注解
    if ("pk".equals(Case.LOWER.apply(col.getName()))){
      comm.annos = "\t@Id\n"
      //自增主键需要
      comm.annos += "@Column(name = \"" + col.getName() + "\")"
    }
    fields += [comm]//字段对照
  }
}

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]
}


def isNotEmpty(content) {
  return content != null && content.toString().trim().length() > 0
}