spring data jpa 代码生成！！（精华帖）

1. 通过数据库动态生成自己想要生成的各种模板，需要了解grovery。

2. ---

   view -> Tool Windows -> Database
   
   

2. + -> Data source -> MySQL
   

   

3. 配置数据库信息

   
   
   

4. 建立存放实体的包

   
   
   

5. 导入必要maven依赖

  <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.21</version>
        </dependency>
        <!--jpa-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <!-- lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

6. 在database视图区域任意地方右键，然后Scripted Extensions -> Go to Scripts Directory
   

   

7. 复制下面的文件到6中跳转的文件夹中

• Generate POJOs.groovy

• import com.intellij.database.model.DasTable
  import com.intellij.database.model.ObjectKind
  import com.intellij.database.util.Case
  import com.intellij.database.util.DasUtil
  
  config = [
          impSerializable  : true,
          extendBaseEntity : false,
          extendBaseService: true
  
  ]
  baseEntityPackage = "com.hhsj.base.BaseEntity"
  baseServicePackage = "com.hhsj.base.BaseService"
  baseEntityProperties = ["id", "createDate", "lastModifiedDate", "version"]
  typeMapping = [
          (~/(?i)bool|boolean|tinyint/)     : "Boolean",
          (~/(?i)bigint/)                   : "Long",
          (~/int/)                          : "Integer",
          (~/(?i)float|double|decimal|real/): "Double",
          (~/(?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 && it.getKind() == ObjectKind.TABLE
    }.each {
      generate(it, dir)
    }
  }
  //dif -> E:DEVELOPECodejpademosrcmainjavacomdemojpa
  def generate(table, dir) {
  
    def entityPath = "${dir.toString()}\entity",
        servicePath = "${dir.toString()}\service",
        repPath = "${dir.toString()}\repository",
        serviceImpPath = "${dir.toString()}\service\impl"
  
    mkdirs([entityPath, servicePath, repPath, serviceImpPath])
  
    def entityName = javaName(table.getName(), true)
    def fields = calcFields(table)
    def basePackage = clacBasePackage(dir)
  
    new File("${entityPath}\${entityName}.java").withPrintWriter { out -> genEntity(out, table, entityName, fields, basePackage) }
    new File("${servicePath}\${entityName}Service.java").withPrintWriter { out -> genService(out, table, entityName, fields, basePackage) }
    new File("${repPath}\${entityName}Repository.java").withPrintWriter { out -> genRepository(out, table, entityName, fields, basePackage) }
  //  new File("${repPath}\${entityName}RepositoryCustom.java").withPrintWriter { out -> genRepositoryCustom(out, entityName, basePackage) }
    new File("${serviceImpPath}\${entityName}ServiceImpl.java").withPrintWriter { out -> getServiceImpl(out, table, entityName, fields, basePackage) }
  
  }
  
  def genProperty(out, field) {
    if (field.annos != "") out.println "  ${field.annos}"
    if (field.colum != field.name) {
      out.println "	@Column(name = "${field.colum}")"
    }
    out.println "	private ${field.type} ${field.name};"
    out.println ""
  }
  
  def genEntity(out, table, entityName, fields, basePackage) {
    out.println "package ${basePackage}.entity;"
    out.println ""
    if (config.extendBaseEntity) {
      out.println "import $baseEntityPackage;"
    }
    out.println "import lombok.Data;"
    out.println ""
    if (config.impSerializable) {
      out.println "import java.io.Serializable;"
      out.println "import com.fasterxml.jackson.annotation.JsonIgnoreProperties;"
      out.println ""
    }
    out.println "import javax.persistence.*;"
    out.println ""
    out.println "@Data"
    out.println "@Entity"
    out.println "@Table(name = "${table.getName()}")"
    out.println "@JsonIgnoreProperties(value={"hibernateLazyInitializer","handler","fieldHandler"})"
    out.println "public class $entityName${config.extendBaseEntity ? " extends BaseEntity" : ""}${config.impSerializable ? " implements Serializable" : ""} {"
    out.println ""
    if (config.extendBaseEntity) {
      // 继承父类
      fields.each() { if (!isBaseEntityProperty(it.name)) genProperty(out, it) }
    } else {
      // 不继承父类
      out.println "	@Id"
      out.println "	@GeneratedValue(strategy = GenerationType.IDENTITY)"
      fields.each() { genProperty(out, it) }
    }
    out.println "}"
  
  }
  
  def genService(out, table, entityName, fields, basePackage) {
    out.println "package ${basePackage}.service;"
    out.println ""
    out.println "import ${basePackage}.repository.${entityName}Repository;"
    out.println "import ${basePackage}.base.Result;"
    if (config.extendBaseService) {
      out.println "import $baseServicePackage;"
      out.println "import ${basePackage}.entity.$entityName;"
    }
    out.println "import org.springframework.stereotype.Service;"
    out.println ""
    out.println "import javax.annotation.Resource;"
    out.println ""
    out.println "public interface ${entityName}Service${config.extendBaseService ? " extends BaseService<$entityName, ${fields[0].type}>" : ""}  {"
    out.println ""
    out.println "   //根据id查询"
    out.println "   public Result getOne(${fields[0].type} id);"
    out.println ""
    out.println "   //根据id删除"
    out.println "   public Result deleteOne(${fields[0].type} id);"
    out.println ""
    out.println "   //根据id保存"
    out.println "   public Result saveOne(${entityName} entity);"
    out.println "}"
  }
  
  def genRepository(out, table, entityName, fields, basePackage) {
    out.println "package ${basePackage}.repository;"
    out.println ""
    out.println "import ${basePackage}.entity.$entityName;"
    out.println "import org.springframework.data.jpa.repository.JpaRepository;"
    out.println ""
    out.println "public interface ${entityName}Repository extends JpaRepository<$entityName, ${fields[0].type}>{}"
  }
  
  /*def genRepositoryCustom(out, entityName, basePackage) {
    out.println "package ${basePackage}.repository;"
    out.println ""
    out.println "public interface ${entityName}RepositoryCustom { "
    out.println "}"
  }*/
  
  def getServiceImpl(out, table, entityName, fields, basePackage) {
    out.println "package ${basePackage}.service.impl;"
    out.println ""
    out.println "import ${basePackage}.service.${entityName}Service;"
    out.println "import org.springframework.stereotype.Service;"
    out.println "import ${basePackage}.base.Result;"
    out.println "import ${basePackage}.entity.${entityName};"
    out.println "import ${basePackage}.service.${entityName}Service;"
    out.println "import ${basePackage}.repository.${entityName}Repository;"
    out.println "import org.springframework.beans.factory.annotation.Autowired;"
    out.println ""
    out.println "@Service"
    out.println "public class ${entityName}ServiceImpl implements ${entityName}Service {"
    out.println ""
    out.println "	@Autowired"
    out.println "	private ${entityName}Repository rep;"
    out.println ""
    out.println "	@Override"
    out.println "	public Result getOne(${fields[0].type} id){"
    out.println " 		${entityName} one = rep.getOne(id);"
    out.println "		return Result.builder().success().data(one).build();"
    out.println "	}"
    out.println ""
    out.println "	@Override"
    out.println "	public Result deleteOne(${fields[0].type} id){"
    out.println " 		rep.deleteById(id);"
    out.println "		return Result.builder().success().build();"
    out.println "	}"
    out.println ""
    out.println "	@Override"
    out.println "	public Result saveOne(${entityName} entity){"
    out.println " 		${entityName} one = rep.save(entity);"
    out.println "		return Result.builder().success().data(one).build();"
    out.println "	}"
    out.println "}"
  }
  
  def mkdirs(dirs) {
    dirs.forEach {
      def f = new File(it)
      if (!f.exists()) {
        f.mkdirs();
      }
    }
  }
  
  def clacBasePackage(dir) {
    dir.toString()
            .replaceAll("^.+\\src\\main\\java\\", "")
            .replaceAll("\\", ".")
  }
  
  def isBaseEntityProperty(property) {
    baseEntityProperties.find { it == property } != null
  }
  // 转换类型
  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
        fields += [[
                           name : javaName(col.getName(), false),
                           colum: col.getName(),
                           type : typeStr,
                           annos: ""]]
    }
  }
  
  def javaName(str, capitalize) {
    def s = str.split(/(?<=[^p{IsLetter}])/).collect { Case.LOWER.apply(it).capitalize() }
            .join("").replaceAll(/[^p{javaJavaIdentifierPart}]/, "_").replaceAll(/_/, "")
    capitalize || s.length() == 1 ? s : Case.LOWER.apply(s[0]) + s[1..-1]
  }