idea自定义Generate POJOs.groovy使entity生成自定义注解@Column字段名

使用idea的database连接数据库后，在表上右键可以自动生成entity文件，非常方便

默认生成的entity只要属性与getter setter，可以通过修改Generate POJOs.groovy文件，来自动生成需要的@Column(name = "ID")这样的注解

下面是截取的已经【修改过】得Generate POJOs.groovy文件, 类似python语法，其中的修改是，先在calcFields函数加入filed: col.getName(),
然后在generate函数加入out.println " @Column(name = \"${it.filed}\")"

def generate(out, className, fields) {
  out.println "package $packageName"
  out.println ""
  out.println ""
  out.println "public class $className {"
  out.println ""
  fields.each() {
    if (it.annos != "") out.println "  ${it.annos}"
    out.println "  @Column(name = \"${it.filed}\")"
    out.println "  private ${it.type} ${it.name};"
  }
  out.println ""
  fields.each() {
    out.println ""
    out.println "  public ${it.type} get${it.name.capitalize()}() {"
    out.println "    return ${it.name};"
    out.println "  }"
    out.println ""
    out.println "  public void set${it.name.capitalize()}(${it.type} ${it.name}) {"
    out.println "    this.${it.name} = ${it.name};"
    out.println "  }"
    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
    fields += [[
                 name : javaName(col.getName(), false),
                 type : typeStr,
                 filed: col.getName(),
                 annos: ""]]
  }
}

最后会直接生成带有@Column(name = "ID")注解的entity，免去手写，也可以自己添加需要的

下面是我修改后的【完整】文件内容
修改的部分

1. package名称
2. 导入的类名
3. 使用lombok插件与jpa注解,使用lombok【注释】了生成getter与setter，jpa的@Table，@Column注解
4. 数据库对应类型的java类，数据库datetime转为util.date

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

/*
 * Available context bindings:
 *   SELECTION   Iterable<DasObject>
 *   PROJECT     project
 *   FILES       files helper
 */

packageName = "com.mjoys.bank3d.bank3d_admin.entity;"
typeMapping = [
  (~/(?i)int/)                      : "Long",
  (~/(?i)float|double|decimal|real/): "Double",
  (~/(?i)datetime|timestamp/)       : "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) + "E"
  def fields = calcFields(table)
  new File(dir, className + ".java").withPrintWriter { out -> generate(out, className, fields, table) }
}

def generate(out, className, fields, table) {
  out.println "package $packageName"
  out.println ""
  out.println ""
  out.println "import lombok.Data;"
  out.println "import lombok.experimental.Accessors;"
  out.println "import org.hibernate.annotations.DynamicInsert;"
  out.println "import org.hibernate.annotations.DynamicUpdate;"
  out.println ""
  out.println "import javax.persistence.Column;"
  out.println "import javax.persistence.Entity;"
  out.println "import javax.persistence.Table;"
  out.println "import java.util.Date;"
  out.println ""
  out.println "@Entity"
  out.println "@Table(name = \"${table.getName()}\")"
  out.println "@Data"
  out.println "@DynamicUpdate"
  out.println "@DynamicInsert"
  out.println "@Accessors(chain = true)"
  out.println "public class $className {"
  out.println ""
  fields.each() {
    if (it.annos != "") out.println "  ${it.annos}"
    out.println "  @Column(name = \"${it.filed}\")"
    out.println "  private ${it.type} ${it.name};"
  }
  out.println ""
//  fields.each() {
//    out.println ""
//    out.println "  public ${it.type} get${it.name.capitalize()}() {"
//    out.println "    return ${it.name};"
//    out.println "  }"
//    out.println ""
//    out.println "  public void set${it.name.capitalize()}(${it.type} ${it.name}) {"
//    out.println "    this.${it.name} = ${it.name};"
//    out.println "  }"
//    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
    fields += [[
                 name : javaName(col.getName(), false),
                 type : typeStr,
                 filed: col.getName(),
                 annos: ""]]
  }
}

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]
}