JPA自动生成POJO

原文地址

JPA自动生成POJO

通过表生成POJO类

这篇文章不涉及idea配置数据源教程，该文章使用前提是用户已配置好idea数据源

修改自带的生成类

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.text.SimpleDateFormat

/*
 * Available context bindings:
 *   SELECTION   Iterable<DasObject>
 *   PROJECT     project
 *   FILES       files helper
 */
packageName = ""
typeMapping = [
        (~/(?i)tinyint|smallint|mediumint/)      : "Integer",
        (~/(?i)int/)                             : "Long",
        (~/(?i)bool|bit/)                        : "Boolean",
        (~/(?i)float|double|decimal|real/)       : "BigDecimal",
        (~/(?i)datetime|timestamp|date|time/)    : "Date",
        (~/(?i)blob|binary|bfile|clob|raw|image/): "InputStream",
        (~/(?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) }
}

def generate(table, dir) {
    def className = javaName(table.getName(), true)
    def fields = calcFields(table)
    packageName = getPackageName(dir)
    PrintWriter printWriter = new PrintWriter(new OutputStreamWriter(new FileOutputStream(new File(dir, className + ".java")), "UTF-8"))
    printWriter.withPrintWriter { out -> generate(out, className, fields, table) }

//    new File(dir, className + ".java").withPrintWriter { out -> generate(out, className, fields,table) }
}

// 获取包所在文件夹路径
def getPackageName(dir) {
    return dir.toString().replaceAll("\\\\", ".").replaceAll("/", ".").replaceAll("^.*src(\\.main\\.java\\.)?", "") + ";"
}

def generate(out, className, fields, table) {
    out.println "package $packageName"
    out.println ""
    out.println "import lombok.Data;"
    out.println "import javax.persistence.Column;"
    out.println "import javax.persistence.Entity;"
    out.println "import javax.persistence.Table;"
    out.println "import javax.persistence.Id;"
    out.println "import javax.persistence.GeneratedValue;"
    out.println "import java.io.Serializable;"
    Set types = new HashSet()

    fields.each() {
        types.add(it.type)
    }

    if (types.contains("Date")) {
        out.println "import java.util.Date;"
    }

    if (types.contains("BigDecimal")) {
        out.println "import java.math.BigDecimal;"
    }

    if (types.contains("InputStream")) {
        out.println "import java.io.InputStream;"
    }
    out.println ""
    out.println "/**\n" +
            " * " + table.getName() + "\n" +
            " * \n" +
            " * @author <a href = \"mailto:njpkhuan@gmail.com\" > huan </a >\n" + //1. 修改idea为自己名字
            " * @date " + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()) + " \n" +
            " */"
    out.println ""
    out.println "@Data"
    out.println "@Entity"
    out.println "@Table ( name =\"" + table.getName() + "\" , schema = \""+ DasUtil.getSchema(table)+"\")"
    //2. schema = \"后面添加自己的表空间名称(mysql可以不添加, 不用这个schema属性也行)
    out.println "public class $className  implements Serializable {"
    out.println ""
    out.println genSerialID()
    fields.each() {
        out.println ""
        // 输出注释
        if (isNotEmpty(it.commoent)) {
            out.println "\t/**"
            out.println "\t * ${it.commoent.toString()}"
            out.println "\t */"
        }

        if ((it.annos + "").indexOf("[@Id]") >= 0) out.println "\t@Id\r\n\t@GeneratedValue(strategy = GenerationType.IDENTITY)"

        if (it.annos != "") out.println "   ${it.annos.replace("[@Id]", "")}"

        // 输出成员变量
        out.println "\tprivate ${it.type} ${it.name};"
    }
    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 = [
                colName : col.getName(),
                name    : javaName(col.getName(), false),
                type    : typeStr,
                commoent: col.getComment(),
                annos   : "\t@Column(name = \"" + col.getName() + "\" )"]
        if ("id".equals(Case.LOWER.apply(col.getName())))
            comm.annos += ["@Id"]
        fields += [comm]
    }
}

// 这里是处理数据库表前缀的方法，这里处理的是t_xxx命名的表
// 已经修改为使用javaName, 如果有需要可以在def className = javaName(table.getName(), true)中修改为javaClassName
// 处理类名（这里是因为我的表都是以t_命名的，所以需要处理去掉生成类名时的开头的T，
// 如果你不需要去掉表的前缀，那么请查找用到了 javaClassName这个方法的地方修改为 javaName 即可）
def javaClassName(str, capitalize) {
    def s = com.intellij.psi.codeStyle.NameUtil.splitNameIntoWords(str)
            .collect { Case.LOWER.apply(it).capitalize() }
            .join("")
            .replaceAll(/[^\p{javaJavaIdentifierPart}[_]]/, "_")
    // 去除开头的T  http://developer.51cto.com/art/200906/129168.htm
    s = s[1..s.size() - 1]
    capitalize || s.length() == 1 ? s : Case.LOWER.apply(s[0]) + s[1..-1]
}

def javaName(str, capitalize) {
//    def s = str.split(/(?<=[^\p{IsLetter}])/).collect { Case.LOWER.apply(it).capitalize() }
//            .join("").replaceAll(/[^\p{javaJavaIdentifierPart}]/, "_")
//    capitalize || s.length() == 1? s : Case.LOWER.apply(s[0]) + s[1..-1]
    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
}

static String changeStyle(String str, boolean toCamel) {
    if (!str || str.size() <= 1)
        return str

    if (toCamel) {
        String r = str.toLowerCase().split('_').collect { cc -> Case.LOWER.apply(cc).capitalize() }.join('')
        return r[0].toLowerCase() + r[1..-1]
    } else {
        str = str[0].toLowerCase() + str[1..-1]
        return str.collect { cc -> ((char) cc).isUpperCase() ? '_' + cc.toLowerCase() : cc }.join('')
    }
}

//生成序列化的serialVersionUID
static String genSerialID() {
    return "\tprivate static final long serialVersionUID =  " + Math.abs(new Random().nextLong()) + "L;"
}

使用(右击表名)

效果

文件夹要选择model文件夹，其他文件夹不行

package com.fedtech.sso.config;

import lombok.Data;

import javax.persistence.*;
import java.io.Serializable;
import java.util.Date;

/**
 * user
 *
 * @author <a href = "mailto:njpkhuan@gmail.com" > huan </a >
 * @date 2021-02-18 14:49:22
 */

@Data
@Entity
@Table ( name ="user" , schema = "pension_pz")
public class User  implements Serializable {

  private static final long serialVersionUID =  2682344461617421681L;

  /**
   * id
   */
  @Id
  @GeneratedValue(strategy = GenerationType.IDENTITY)

  @Column(name = "id" )
  private Long id;

  /**
   * 用户登录账号
   */

  @Column(name = "login_name" )
  private String loginName;

  /**
   * 密码
   */

  @Column(name = "password" )
  private String password;

  /**
   * 昵称
   */

  @Column(name = "nick_name" )
  private String nickName;

  /**
   * 所属区域
   */

  @Column(name = "area_id" )
  private Long areaId;

  /**
   * 所属服务组织/机构
   */

  @Column(name = "org_id" )
  private Long orgId;

  /**
   * 所属评估机构
   */

  @Column(name = "assess_org_id" )
  private Long assessOrgId;

  /**
   * 电话
   */

  @Column(name = "phone" )
  private String phone;

  /**
   * 头像
   */

  @Column(name = "avatar" )
  private String avatar;

  /**
   * 性别：1男,2女,0保密
   */

  @Column(name = "gender" )
  private String gender;

  /**
   * 用户认证token
   */

  @Column(name = "token" )
  private String token;

  /**
   * app验证信息
   */

  @Column(name = "token_app" )
  private String tokenApp;

  /**
   * 0:待激活 1:正常 2：已删除 3已禁用
   */

  @Column(name = "status" )
  private String status;

  /**
   * 联系人
   */

  @Column(name = "link_name" )
  private String linkName;

  /**
   * 邮箱
   */

  @Column(name = "email" )
  private String email;

  /**
   * 盐
   */

  @Column(name = "salt" )
  private String salt;

  /**
   * 记录创建时间
   */

  @Column(name = "create_time" )
  private Date createTime;

  /**
   * 记录更新时间
   */

  @Column(name = "modify_time" )
  private Date modifyTime;

  /**
   * 组织名称
   */

  @Column(name = "org_name" )
  private String orgName;

  /**
   * 省名称
   */

  @Column(name = "province_name" )
  private String provinceName;

  /**
   * 市名称
   */

  @Column(name = "city_name" )
  private String cityName;

  /**
   * 区县名称
   */

  @Column(name = "county_name" )
  private String countyName;

  /**
   * 镇名称
   */

  @Column(name = "town_name" )
  private String townName;

  /**
   * 村名称
   */

  @Column(name = "village_name" )
  private String villageName;

  /**
   * 创建用户
   */

  @Column(name = "create_uid" )
  private Long createUid;
}