自定义Generate POJOs.groovy

红太狼 2020-11-15 14:28 1374阅读 0赞

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<DasObject>
     *   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" +
              " * <p>@Date: " + LocalDateTime.now().format(DateTimeFormatter.ofPattern("yy-MM-dd HH:mm:ss")).toString() + ".</p>\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
    }