idea自带DB管理添加数据库后，再需要导出的表上右击：

image.png

部分需要自己修改的可以在下图处修改：

image.png

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.sample;"
packageName = "com.uniubi.entity.mysql;"

date = "java.util.Date;"

typeMapping = [
//  (~/(?i)int/)                      : "long",
  (~/(?i)int/)                      : "Integer",
  (~/(?i)float|double|decimal|real/): "double",
//  (~/(?i)datetime|timestamp/)       : "java.sql.Timestamp",
  (~/(?i)datetime|timestamp/)       : "Date",
//  (~/(?i)date/)                     : "java.sql.Date",
  (~/(?i)date/)                     : "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()+"MysqlPo", true)
  def fields = calcFields(table)
  new File(dir, className + ".java").withPrintWriter { out -> generate(out, className, fields) }
}

def generate(out, className, fields) {
  out.println "package $packageName"
  out.println "import $date"
  out.println ""
  out.println "public class $className {"
  out.println ""
  fields.each() {
    if (it.annos != "") out.println "  ${it.annos}"
    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,
                 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]
}

导出后entity如下：

package com.uniubi.entity.mysql;
import java.util.Date;

public class MsUserMysqlPo {

  private String userGuid;
  private String userName;
  private String password;
  private Date createTime;
  private Date modifyTime;
  private String description;
  private Date lastLoginTime;
  private String nickName;


  public String getUserGuid() {
    return userGuid;
  }

  public void setUserGuid(String userGuid) {
    this.userGuid = userGuid;
  }

  public String getUserName() {
    return userName;
  }

  public void setUserName(String userName) {
    this.userName = userName;
  }

  public String getPassword() {
    return password;
  }

  public void setPassword(String password) {
    this.password = password;
  }


  public Date getCreateTime() {
    return createTime;
  }

  public void setCreateTime(Date createTime) {
    this.createTime = createTime;
  }


  public Date getModifyTime() {
    return modifyTime;
  }

  public void setModifyTime(Date modifyTime) {
    this.modifyTime = modifyTime;
  }


  public String getDescription() {
    return description;
  }

  public void setDescription(String description) {
    this.description = description;
  }

  public Date getLastLoginTime() {
    return lastLoginTime;
  }

  public void setLastLoginTime(Date lastLoginTime) {
    this.lastLoginTime = lastLoginTime;
  }


  public String getNickName() {
    return nickName;
  }

  public void setNickName(String nickName) {
    this.nickName = nickName;
  }

}