使用jhipster 加速java web开发

jhipster，中文释义： Java 热爱者!

JHipster is a development platform to quickly generate, develop, & deploy modern web applications & microservice architectures.

JHipster 可以通过代码生成，让你快速开发web应用和微服务。

安装

1. 安装Java,Git Node.js
2. 安装 JHipster npm install -g generator-jhipster
   • 建议安装最新的7.0版本,
3. 创建应用目录 mkdir myApp && cd myApp
4. 运行jhipster命令，根据提示设置应用
5. 可以通过JDL Studio 来生成jhipster-jdl.jh文件
6. 然后通过jhipster jdl jhipster-jdl.jh来生成代码，JDL 后续会重点介绍

JDL 入门

JDL 是jhipster的数据模型定义文件，通过这个文件我们可以定义数据结构，然后jhipster基于这个JDL，就可以生成实体类、服务类以及前端页面。

例如，我们要开发投诉建议，假如设计的数据表如下：

字段	comment	类型	备注
record_id	主键	Bigint	自增
feedback_type	反馈类型	unsigned tinyint	枚举值：[1:意见与建议;5:投诉]
title	标题	varchar(64)
content	问题描述	varchar(512)
feedback_status	反馈状态	unsigned tinyint	枚举值：[1:待提交;5:待回复;10:待确认;15:已解决;]
last_reply_time	最后回复时间	timestamp	与feedback_status联合使用，当状态为2的时候，更新此时间，用于超时判断
close_type	关闭类型	unsigned tinyint	枚举值：[1:正常关闭;5:超时关闭;]
created_date	创建时间	timestamp
created_by	创建者	char(32)

使用jhipster,我们可以用jdl来定义：

/**
 * 反馈记录表
 */
entity FeedbackRecord {
    /** 反馈类型*/
    feedbackType FeedbackType,
    /** 问题描述 */
    title String,
    /** 反馈状态     */
    feedbackStatus FeedbackStatus,
     /** 是否已完成 */
    lastReplyTime Integer,
     /** 关闭类型     */
    closeType FeedbackCloseType,
     /** 创建时间 */
    createdDate Instant,
    /**     创建者 */
    createdBy String
}
/** 反馈类型 */
enum FeedbackType {
    ADVICE,
    COMPLAINTS
}
/** 反馈状态 */
enum FeedbackStatus {
    TO_BE_SUBMIT, TO_BE_REPLY, TO_BE_CONFIRMED
}
/** 关闭类型 */
enum FeedbackCloseType {
    NORMALLY, TIMEOUT
}

dto * with mapstruct
service all with serviceImpl
paginate all with pagination

详细讲解：

实体和字段

entity 表示一个实体，可以增加字段，注意，不用增加id

语法是：

[<entity javadoc>]
[<entity annotation>*]
entity <entity name> [(<table name>)] {
  [<field javadoc>]
  [<field annotation>*]
  <field name> <field type> [<validation>*]
}

例如：

entity A {
  name String required
  age Integer min(42) max(42)
}

可以增加required、min、max等验证

字段的注释:

/**
 * This is a comment
 * about a class
 * @author Someone
 */
entity A {
  /** 名称 */
   name String
   age Integer // this is yet another comment
}

JHipster支持许多字段类型。这种支持取决于您的数据库后端，因此我们使用Java类型来描述它们：JavaString将以不同的方式存储在Oracle或Cassandra中，这是JHipster的优势之一，可以为您生成正确的数据库访问代码。

• String: Java字符串。它的默认大小取决于基础后端（如果使用JPA，默认情况下为255），但是您可以使用校验规则进行更改（例如，修改 max大小为1024）。
• Integer: Java整数。
• Long: Java长整数。
• Float: Java浮点数.
• Double: Java双精度浮点数.
• BigDecimal: java.math.BigDecimal对象, 当您需要精确的数学计算时使用（通常用于财务操作）。
• LocalDate: java.time.LocalDate对象, 用于正确管理Java中的日期。
• Instant: java.time.Instant对象, 用于表示时间戳，即时间线上的瞬时点。
• ZonedDateTime: java.time.ZonedDateTime对象, 用于表示给定时区（通常是日历中会议、约定）中的本地日期时间。请注意，REST和持久层都不支持时区，因此您很可能应该使用Instant。
• Duration: java.time.Duration对象, 用于表示时间量。
• UUID: java.util.UUID对象.
• Boolean: Java布尔型.
• Enumeration:Java枚举对象。选择此类型后，子生成器将询问您要在枚举中使用哪些值，并将创建一个特定的enum类来存储它们。
• Blob: Blob对象，用于存储一些二进制数据。选择此类型时，子生成器将询问您是否要存储通用二进制数据，图像对象或CLOB（长文本）。图像将专门在Angular侧进行优化处理，因此可以将其正常显示给最终用户。

字段的数据类型及数据库支持：

枚举

对于可枚举的状态，建议采用枚举值：

enum [<enum name>] {
  <ENUM KEY> ([<enum value>])
}

例如：

/** 反馈类型 */
enum FeedbackType {
    ADVICE,
    COMPLAINTS
}

关系

SQL数据库支持表和表的关联：

• OneToOne
• OneToMany
• ManyToOne
• ManyToMany

如何定义关系呢？

relationship (OneToMany | ManyToOne | OneToOne | ManyToMany) {
  <from entity>[{<relationship name>[(<display field>)]}] to <to entity>[{<relationship name>[(<display field>)]}]+
}

例如, 下面的例子里，我们定义两个对象，File和Chunk，1个Chunk属于一个File：

/**
 * 文件
 */
entity File {
    /** 文件名 */
    name String,
    /** 文件大小 */
    size Long,
    /** 文件路径 */
    path String,
    /** 分片数 */
    chunks Integer,
     /** 是否已完成 */
    complete Integer
}

/**
 * 文件分片
 */
entity Chunk {
    /** md5值 */
    md5 String,
    /** 分片序号 */
    number Integer,
    /** 分片名称 */
    name String
}

relationship ManyToOne {
    /** 所属文件 */
    Chunk{file} to File
}

对应的关系图：

生成代码配置

JHipster提供了丰富的配置，可以用来指定生成代码时的策略，例如是否要生成DTO对象，是否需要支持分页，是否需要生成service类，如果生成service，是使用serviceClass还是serviceImpl。

示例如下：

entity A {
  name String required
}
entity B
entity C

// 筛选实体
filter *

// 生成dto
dto A, B with mapstruct

// 分页
paginate A with infinite-scroll
paginate B with pagination
paginate C with pager  // pager is only available in AngularJS

// 生成service
service A with serviceClass
service C with serviceImpl

生成代码

首先定义jdl文件：

/**
 * 反馈记录表
 */
entity FeedbackRecord {
    /** 反馈类型*/
    feedbackType FeedbackType,
    /** 问题描述 */
    title String,
    /** 反馈状态     */
    feedbackStatus FeedbackStatus,
     /** 是否已完成 */
    lastReplyTime Integer,
     /** 关闭类型     */
    closeType FeedbackCloseType,
     /** 创建时间 */
    createdDate Instant,
    /**     创建者 */
    createdBy String
}
/** 反馈类型 */
enum FeedbackType {
    ADVICE,
    COMPLAINTS
}
/** 反馈状态 */
enum FeedbackStatus {
    TO_BE_SUBMIT, TO_BE_REPLY, TO_BE_CONFIRMED
}
/** 关闭类型 */
enum FeedbackCloseType {
    NORMALLY, TIMEOUT
}
// 筛选实体
filter *
// 生成DTO
dto * with mapstruct
// 生成带接口和实现的service
service all with serviceImpl
// 支持分页
paginate all with pagination

然后生成代码：

jhipster jdl feedback.jh --force

可以看到类似下面的输出

D:\Project\jhipster-7>jhipster jdl feedback.jh --force
INFO! Using JHipster version installed locally in current project's node_modules
INFO! Executing import-jdl feedback.jh
INFO! The JDL is being parsed.
info: The dto option is set for FeedbackRecord, the 'serviceClass' value for the 'service' is gonna be set for this entity if no other value has been set.
INFO! Found entities: FeedbackRecord.
INFO! The JDL has been successfully parsed
INFO! Generating 0 applications.
INFO! Generating 1 entity.
INFO! Generating entities for application undefined in a new parallel process

Found the D:\Project\jhipster-7\.jhipster\File.json configuration file, entity can be automatically generated!

Found the D:\Project\jhipster-7\.jhipster\Chunk.json configuration file, entity can be automatically generated!

Found the D:\Project\jhipster-7\.jhipster\FeedbackRecord.json configuration file, entity can be automatically generated!

     info Creating changelog for entities File,Chunk,FeedbackRecord
    force .yo-rc.json
    force .jhipster\FeedbackRecord.json
    force .jhipster\File.json
    force .jhipster\Chunk.json
    force src\main\java\com\company\datahub\domain\File.java
    force src\main\java\com\company\datahub\web\rest\FileResource.java
    force src\main\java\com\company\datahub\repository\FileRepository.java
    force src\main\java\com\company\datahub\service\FileService.java
    force src\main\java\com\company\datahub\service\impl\FileServiceImpl.java
    force src\main\java\com\company\datahub\service\dto\FileDTO.java
    force src\main\java\com\company\datahub\service\mapper\EntityMapper.java
    force src\main\java\com\company\datahub\service\mapper\FileMapper.java
    force src\test\java\com\company\datahub\web\rest\FileResourceIT.java
    force src\test\java\com\company\datahub\domain\FileTest.java
    force src\test\java\com\company\datahub\service\dto\FileDTOTest.java
    force src\test\java\com\company\datahub\service\mapper\FileMapperTest.java
    force src\main\webapp\app\shared\model\file.model.ts
    force src\main\webapp\app\entities\file\file-details.vue
    force src\main\webapp\app\entities\file\file-details.component.ts
    force src\main\webapp\app\entities\file\file.vue
    force src\main\webapp\app\entities\file\file.component.ts
    force src\main\webapp\app\entities\file\file.service.ts
    force src\main\webapp\app\entities\file\file-update.vue
    force src\main\webapp\app\entities\file\file-update.component.ts
    force src\test\javascript\spec\app\entities\file\file.component.spec.ts
    force src\test\javascript\spec\app\entities\file\file-details.component.spec.ts
    force src\test\javascript\spec\app\entities\file\file.service.spec.ts
    force src\test\javascript\spec\app\entities\file\file-update.component.spec.ts
    force src\main\webapp\app\router\entities.ts
    force src\main\webapp\app\main.ts
    force src\main\webapp\app\core\jhi-navbar\jhi-navbar.vue
    force src\main\webapp\i18n\zh-cn\file.json
    force src\main\webapp\i18n\zh-cn\global.json
    force src\main\webapp\i18n\en\file.json
    force src\main\webapp\i18n\en\global.json
    force src\main\java\com\company\datahub\domain\Chunk.java
    force src\main\java\com\company\datahub\web\rest\ChunkResource.java
    force src\main\java\com\company\datahub\repository\ChunkRepository.java
    force src\main\java\com\company\datahub\service\ChunkService.java
    force src\main\java\com\company\datahub\service\impl\ChunkServiceImpl.java
    force src\main\java\com\company\datahub\service\dto\ChunkDTO.java
    force src\main\java\com\company\datahub\service\mapper\ChunkMapper.java
    force src\test\java\com\company\datahub\web\rest\ChunkResourceIT.java
    force src\test\java\com\company\datahub\domain\ChunkTest.java
    force src\test\java\com\company\datahub\service\dto\ChunkDTOTest.java
    force src\test\java\com\company\datahub\service\mapper\ChunkMapperTest.java
    force src\main\webapp\app\shared\model\chunk.model.ts
    force src\main\webapp\app\entities\chunk\chunk-details.vue
    force src\main\webapp\app\entities\chunk\chunk-details.component.ts
    force src\main\webapp\app\entities\chunk\chunk.vue
    force src\main\webapp\app\entities\chunk\chunk.component.ts
    force src\main\webapp\app\entities\chunk\chunk.service.ts
    force src\main\webapp\app\entities\chunk\chunk-update.vue
    force src\main\webapp\app\entities\chunk\chunk-update.component.ts
    force src\test\javascript\spec\app\entities\chunk\chunk.component.spec.ts
    force src\test\javascript\spec\app\entities\chunk\chunk-details.component.spec.ts
    force src\test\javascript\spec\app\entities\chunk\chunk.service.spec.ts
    force src\test\javascript\spec\app\entities\chunk\chunk-update.component.spec.ts
    force src\main\webapp\i18n\zh-cn\chunk.json
    force src\main\webapp\i18n\en\chunk.json
   create src\main\java\com\company\datahub\domain\FeedbackRecord.java
   create src\main\java\com\company\datahub\web\rest\FeedbackRecordResource.java
   create src\main\java\com\company\datahub\repository\FeedbackRecordRepository.java
   create src\main\java\com\company\datahub\service\FeedbackRecordService.java
   create src\main\java\com\company\datahub\service\impl\FeedbackRecordServiceImpl.java
   create src\main\java\com\company\datahub\service\dto\FeedbackRecordDTO.java
   create src\main\java\com\company\datahub\service\mapper\FeedbackRecordMapper.java
   create src\test\java\com\company\datahub\web\rest\FeedbackRecordResourceIT.java
   create src\test\java\com\company\datahub\domain\FeedbackRecordTest.java
   create src\test\java\com\company\datahub\service\dto\FeedbackRecordDTOTest.java
   create src\test\java\com\company\datahub\service\mapper\FeedbackRecordMapperTest.java
   create src\main\java\com\company\datahub\domain\enumeration\FeedbackType.java
   create src\main\java\com\company\datahub\domain\enumeration\FeedbackStatus.java
   create src\main\java\com\company\datahub\domain\enumeration\FeedbackCloseType.java
   create src\main\webapp\app\shared\model\feedback-record.model.ts
   create src\main\webapp\app\entities\feedback-record\feedback-record-details.vue
   create src\main\webapp\app\entities\feedback-record\feedback-record-details.component.ts
   create src\main\webapp\app\entities\feedback-record\feedback-record.vue
   create src\main\webapp\app\entities\feedback-record\feedback-record.component.ts
   create src\main\webapp\app\entities\feedback-record\feedback-record.service.ts
    force src\main\resources\config\liquibase\changelog\20210312045459_added_entity_File.xml
    force src\main\resources\config\liquibase\fake-data\file.csv
   create src\main\webapp\app\entities\feedback-record\feedback-record-update.vue
    force src\main\resources\config\liquibase\master.xml
    force src\main\resources\config\liquibase\changelog\20210312045500_added_entity_Chunk.xml
    force src\main\resources\config\liquibase\changelog\20210312045500_added_entity_constraints_Chunk.xml
    force src\main\resources\config\liquibase\fake-data\chunk.csv
   create src\main\resources\config\liquibase\changelog\20210312072243_added_entity_FeedbackRecord.xml
   create src\main\resources\config\liquibase\fake-data\feedback_record.csv
   create src\main\webapp\app\entities\feedback-record\feedback-record-update.component.ts
   create src\test\javascript\spec\app\entities\feedback-record\feedback-record.component.spec.ts
   create src\test\javascript\spec\app\entities\feedback-record\feedback-record-details.component.spec.ts
   create src\test\javascript\spec\app\entities\feedback-record\feedback-record.service.spec.ts
   create src\test\javascript\spec\app\entities\feedback-record\feedback-record-update.component.spec.ts
   create src\main\webapp\app\shared\model\enumerations\feedback-type.model.ts
   create src\main\webapp\app\shared\model\enumerations\feedback-status.model.ts
   create src\main\webapp\app\shared\model\enumerations\feedback-close-type.model.ts
   create src\main\webapp\i18n\zh-cn\feedbackType.json
   create src\main\webapp\i18n\en\feedbackType.json
   create src\main\webapp\i18n\zh-cn\feedbackStatus.json
   create src\main\webapp\i18n\en\feedbackStatus.json
   create src\main\webapp\i18n\zh-cn\feedbackCloseType.json
   create src\main\webapp\i18n\en\feedbackCloseType.json
   create src\main\webapp\i18n\zh-cn\feedbackRecord.json
   create src\main\webapp\i18n\en\feedbackRecord.json
Entity File generated successfully.
Entity Chunk generated successfully.
Entity FeedbackRecord generated successfully.

Running `webapp:build` to update client app

包含domain、service、controller等都有生成：

测试生成程序

运行程序，

列表页面：

编辑页面：

生成代码介绍

Domain

package com.company.datahub.domain;

import com.company.datahub.domain.enumeration.FeedbackCloseType;
import com.company.datahub.domain.enumeration.FeedbackStatus;
import com.company.datahub.domain.enumeration.FeedbackType;
import java.io.Serializable;
import java.time.Instant;
import javax.persistence.*;

/**
 * 反馈记录表
 */
@Entity
@Table(name = "feedback_record")
public class FeedbackRecord implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    /**
     * 反馈类型
     */
    @Enumerated(EnumType.STRING)
    @Column(name = "feedback_type")
    private FeedbackType feedbackType;

    /**
     * 问题描述
     */
    @Column(name = "title")
    private String title;

    /**
     * 反馈状态
     */
    @Enumerated(EnumType.STRING)
    @Column(name = "feedback_status")
    private FeedbackStatus feedbackStatus;

    /**
     * 是否已完成
     */
    @Column(name = "last_reply_time")
    private Integer lastReplyTime;

    /**
     * 关闭类型
     */
    @Enumerated(EnumType.STRING)
    @Column(name = "close_type")
    private FeedbackCloseType closeType;

    /**
     * 创建时间
     */
    @Column(name = "created_date")
    private Instant createdDate;

    /**
     * 创建者
     */
    @Column(name = "created_by")
    private String createdBy;

    // jhipster-needle-entity-add-field - JHipster will add fields here
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public FeedbackRecord id(Long id) {
        this.id = id;
        return this;
    }

    public FeedbackType getFeedbackType() {
        return this.feedbackType;
    }

    public FeedbackRecord feedbackType(FeedbackType feedbackType) {
        this.feedbackType = feedbackType;
        return this;
    }

    public void setFeedbackType(FeedbackType feedbackType) {
        this.feedbackType = feedbackType;
    }

    public String getTitle() {
        return this.title;
    }

    public FeedbackRecord title(String title) {
        this.title = title;
        return this;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public FeedbackStatus getFeedbackStatus() {
        return this.feedbackStatus;
    }

    public FeedbackRecord feedbackStatus(FeedbackStatus feedbackStatus) {
        this.feedbackStatus = feedbackStatus;
        return this;
    }

    public void setFeedbackStatus(FeedbackStatus feedbackStatus) {
        this.feedbackStatus = feedbackStatus;
    }

    public Integer getLastReplyTime() {
        return this.lastReplyTime;
    }

    public FeedbackRecord lastReplyTime(Integer lastReplyTime) {
        this.lastReplyTime = lastReplyTime;
        return this;
    }

    public void setLastReplyTime(Integer lastReplyTime) {
        this.lastReplyTime = lastReplyTime;
    }

    public FeedbackCloseType getCloseType() {
        return this.closeType;
    }

    public FeedbackRecord closeType(FeedbackCloseType closeType) {
        this.closeType = closeType;
        return this;
    }

    public void setCloseType(FeedbackCloseType closeType) {
        this.closeType = closeType;
    }

    public Instant getCreatedDate() {
        return this.createdDate;
    }

    public FeedbackRecord createdDate(Instant createdDate) {
        this.createdDate = createdDate;
        return this;
    }

    public void setCreatedDate(Instant createdDate) {
        this.createdDate = createdDate;
    }

    public String getCreatedBy() {
        return this.createdBy;
    }

    public FeedbackRecord createdBy(String createdBy) {
        this.createdBy = createdBy;
        return this;
    }

    public void setCreatedBy(String createdBy) {
        this.createdBy = createdBy;
    }

    // jhipster-needle-entity-add-getters-setters - JHipster will add getters and setters here

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (!(o instanceof FeedbackRecord)) {
            return false;
        }
        return id != null && id.equals(((FeedbackRecord) o).id);
    }

    @Override
    public int hashCode() {
        // see https://vladmihalcea.com/how-to-implement-equals-and-hashcode-using-the-jpa-entity-identifier/
        return getClass().hashCode();
    }

    // prettier-ignore
    @Override
    public String toString() {
        return "FeedbackRecord{" +
            "id=" + getId() +
            ", feedbackType='" + getFeedbackType() + "'" +
            ", title='" + getTitle() + "'" +
            ", feedbackStatus='" + getFeedbackStatus() + "'" +
            ", lastReplyTime=" + getLastReplyTime() +
            ", closeType='" + getCloseType() + "'" +
            ", createdDate='" + getCreatedDate() + "'" +
            ", createdBy='" + getCreatedBy() + "'" +
            "}";
    }
}

Repository

@SuppressWarnings("unused")
@Repository
public interface FeedbackRecordRepository extends JpaRepository<FeedbackRecord, Long>, JpaSpecificationExecutor<FeedbackRecord> {}

Service

/**
 * Service Interface for managing {@link com.company.datahub.domain.FeedbackRecord}.
 */
public interface FeedbackRecordService {
    /**
     * Save a feedbackRecord.
     *
     * @param feedbackRecordDTO the entity to save.
     * @return the persisted entity.
     */
    FeedbackRecordDTO save(FeedbackRecordDTO feedbackRecordDTO);

    /**
     * Partially updates a feedbackRecord.
     *
     * @param feedbackRecordDTO the entity to update partially.
     * @return the persisted entity.
     */
    Optional<FeedbackRecordDTO> partialUpdate(FeedbackRecordDTO feedbackRecordDTO);

    /**
     * Get all the feedbackRecords.
     *
     * @param pageable the pagination information.
     * @return the list of entities.
     */
    Page<FeedbackRecordDTO> findAll(Pageable pageable);

    /**
     * Get the "id" feedbackRecord.
     *
     * @param id the id of the entity.
     * @return the entity.
     */
    Optional<FeedbackRecordDTO> findOne(Long id);

    /**
     * Delete the "id" feedbackRecord.
     *
     * @param id the id of the entity.
     */
    void delete(Long id);
}

Controller

/**
 * REST controller for managing {@link com.company.datahub.domain.FeedbackRecord}.
 */
@RestController
@RequestMapping("/api")
public class FeedbackRecordResource {

    private final Logger log = LoggerFactory.getLogger(FeedbackRecordResource.class);

    private static final String ENTITY_NAME = "feedbackRecord";

    @Value("${jhipster.clientApp.name}")
    private String applicationName;

    private final FeedbackRecordService feedbackRecordService;

    private final FeedbackRecordQueryService feedbackRecordQueryService;

    public FeedbackRecordResource(FeedbackRecordService feedbackRecordService, FeedbackRecordQueryService feedbackRecordQueryService) {
        this.feedbackRecordService = feedbackRecordService;
        this.feedbackRecordQueryService = feedbackRecordQueryService;
    }

    /**
     * {@code POST  /feedback-records} : Create a new feedbackRecord.
     *
     * @param feedbackRecordDTO the feedbackRecordDTO to create.
     * @return the {@link ResponseEntity} with status {@code 201 (Created)} and with body the new feedbackRecordDTO, or with status {@code 400 (Bad Request)} if the feedbackRecord has already an ID.
     * @throws URISyntaxException if the Location URI syntax is incorrect.
     */
    @PostMapping("/feedback-records")
    public ResponseEntity<FeedbackRecordDTO> createFeedbackRecord(@RequestBody FeedbackRecordDTO feedbackRecordDTO)
        throws URISyntaxException {
        log.debug("REST request to save FeedbackRecord : {}", feedbackRecordDTO);
        if (feedbackRecordDTO.getId() != null) {
            throw new BadRequestAlertException("A new feedbackRecord cannot already have an ID", ENTITY_NAME, "idexists");
        }
        FeedbackRecordDTO result = feedbackRecordService.save(feedbackRecordDTO);
        return ResponseEntity
            .created(new URI("/api/feedback-records/" + result.getId()))
            .headers(HeaderUtil.createEntityCreationAlert(applicationName, true, ENTITY_NAME, result.getId().toString()))
            .body(result);
    }

    /**
     * {@code PUT  /feedback-records} : Updates an existing feedbackRecord.
     *
     * @param feedbackRecordDTO the feedbackRecordDTO to update.
     * @return the {@link ResponseEntity} with status {@code 200 (OK)} and with body the updated feedbackRecordDTO,
     * or with status {@code 400 (Bad Request)} if the feedbackRecordDTO is not valid,
     * or with status {@code 500 (Internal Server Error)} if the feedbackRecordDTO couldn't be updated.
     * @throws URISyntaxException if the Location URI syntax is incorrect.
     */
    @PutMapping("/feedback-records")
    public ResponseEntity<FeedbackRecordDTO> updateFeedbackRecord(@RequestBody FeedbackRecordDTO feedbackRecordDTO)
        throws URISyntaxException {
        log.debug("REST request to update FeedbackRecord : {}", feedbackRecordDTO);
        if (feedbackRecordDTO.getId() == null) {
            throw new BadRequestAlertException("Invalid id", ENTITY_NAME, "idnull");
        }
        FeedbackRecordDTO result = feedbackRecordService.save(feedbackRecordDTO);
        return ResponseEntity
            .ok()
            .headers(HeaderUtil.createEntityUpdateAlert(applicationName, true, ENTITY_NAME, feedbackRecordDTO.getId().toString()))
            .body(result);
    }

    /**
     * {@code PATCH  /feedback-records} : Updates given fields of an existing feedbackRecord.
     *
     * @param feedbackRecordDTO the feedbackRecordDTO to update.
     * @return the {@link ResponseEntity} with status {@code 200 (OK)} and with body the updated feedbackRecordDTO,
     * or with status {@code 400 (Bad Request)} if the feedbackRecordDTO is not valid,
     * or with status {@code 404 (Not Found)} if the feedbackRecordDTO is not found,
     * or with status {@code 500 (Internal Server Error)} if the feedbackRecordDTO couldn't be updated.
     * @throws URISyntaxException if the Location URI syntax is incorrect.
     */
    @PatchMapping(value = "/feedback-records", consumes = "application/merge-patch+json")
    public ResponseEntity<FeedbackRecordDTO> partialUpdateFeedbackRecord(@RequestBody FeedbackRecordDTO feedbackRecordDTO)
        throws URISyntaxException {
        log.debug("REST request to update FeedbackRecord partially : {}", feedbackRecordDTO);
        if (feedbackRecordDTO.getId() == null) {
            throw new BadRequestAlertException("Invalid id", ENTITY_NAME, "idnull");
        }

        Optional<FeedbackRecordDTO> result = feedbackRecordService.partialUpdate(feedbackRecordDTO);

        return ResponseUtil.wrapOrNotFound(
            result,
            HeaderUtil.createEntityUpdateAlert(applicationName, true, ENTITY_NAME, feedbackRecordDTO.getId().toString())
        );
    }

    /**
     * {@code GET  /feedback-records} : get all the feedbackRecords.
     *
     * @param pageable the pagination information.
     * @param criteria the criteria which the requested entities should match.
     * @return the {@link ResponseEntity} with status {@code 200 (OK)} and the list of feedbackRecords in body.
     */
    @GetMapping("/feedback-records")
    public ResponseEntity<List<FeedbackRecordDTO>> getAllFeedbackRecords(FeedbackRecordCriteria criteria, Pageable pageable) {
        log.debug("REST request to get FeedbackRecords by criteria: {}", criteria);
        Page<FeedbackRecordDTO> page = feedbackRecordQueryService.findByCriteria(criteria, pageable);
        HttpHeaders headers = PaginationUtil.generatePaginationHttpHeaders(ServletUriComponentsBuilder.fromCurrentRequest(), page);
        return ResponseEntity.ok().headers(headers).body(page.getContent());
    }

    /**
     * {@code GET  /feedback-records/count} : count all the feedbackRecords.
     *
     * @param criteria the criteria which the requested entities should match.
     * @return the {@link ResponseEntity} with status {@code 200 (OK)} and the count in body.
     */
    @GetMapping("/feedback-records/count")
    public ResponseEntity<Long> countFeedbackRecords(FeedbackRecordCriteria criteria) {
        log.debug("REST request to count FeedbackRecords by criteria: {}", criteria);
        return ResponseEntity.ok().body(feedbackRecordQueryService.countByCriteria(criteria));
    }

    /**
     * {@code GET  /feedback-records/:id} : get the "id" feedbackRecord.
     *
     * @param id the id of the feedbackRecordDTO to retrieve.
     * @return the {@link ResponseEntity} with status {@code 200 (OK)} and with body the feedbackRecordDTO, or with status {@code 404 (Not Found)}.
     */
    @GetMapping("/feedback-records/{id}")
    public ResponseEntity<FeedbackRecordDTO> getFeedbackRecord(@PathVariable Long id) {
        log.debug("REST request to get FeedbackRecord : {}", id);
        Optional<FeedbackRecordDTO> feedbackRecordDTO = feedbackRecordService.findOne(id);
        return ResponseUtil.wrapOrNotFound(feedbackRecordDTO);
    }

    /**
     * {@code DELETE  /feedback-records/:id} : delete the "id" feedbackRecord.
     *
     * @param id the id of the feedbackRecordDTO to delete.
     * @return the {@link ResponseEntity} with status {@code 204 (NO_CONTENT)}.
     */
    @DeleteMapping("/feedback-records/{id}")
    public ResponseEntity<Void> deleteFeedbackRecord(@PathVariable Long id) {
        log.debug("REST request to delete FeedbackRecord : {}", id);
        feedbackRecordService.delete(id);
        return ResponseEntity
            .noContent()
            .headers(HeaderUtil.createEntityDeletionAlert(applicationName, true, ENTITY_NAME, id.toString()))
            .build();
    }
}

测试接口

获取数据

    @GetMapping("/feedback-records")
    public ResponseEntity<List<FeedbackRecordDTO>> getAllFeedbackRecords(FeedbackRecordCriteria criteria, Pageable pageable) {
        log.debug("REST request to get FeedbackRecords by criteria: {}", criteria);
        Page<FeedbackRecordDTO> page = feedbackRecordQueryService.findByCriteria(criteria, pageable);
        HttpHeaders headers = PaginationUtil.generatePaginationHttpHeaders(ServletUriComponentsBuilder.fromCurrentRequest(), page);
        return ResponseEntity.ok().headers(headers).body(page.getContent());
    }

这里有意思的是FeedbackRecordCriteria，可以针对实体中的每个字段进行过滤，不用单独写业务代码去过滤：

比如feedbackStatus是一个枚举，那么可以使用equals，in 等过过滤器。

关于过滤器：

我们测试下，比如查询feedbackStatus 为 TO_BE_REPLY的，那么可以使用feedbackStatus.equals=TO_BE_REPLY

GET http://localhost:8080/api/feedback-records?sort=id,asc&page=0&size=20&feedbackStatus.equals=TO_BE_REPLY

[
    {
        "id": 1,
        "feedbackType": "COMPLAINTS",
        "title": "SMTP lavender Table",
        "feedbackStatus": "TO_BE_REPLY",
        "lastReplyTime": 9391,
        "closeType": "NORMALLY",
        "createdDate": "2021-03-11T21:38:31Z",
        "createdBy": "新疆 Central Soft"
    },
    {
        "id": 2,
        "feedbackType": "ADVICE",
        "title": "上海市 haptic",
        "feedbackStatus": "TO_BE_REPLY",
        "lastReplyTime": 53521,
        "closeType": "NORMALLY",
        "createdDate": "2021-03-11T18:04:14Z",
        "createdBy": "Rubber connect 桥"
    },
    {
        "id": 4,
        "feedbackType": "ADVICE",
        "title": "Senior index",
        "feedbackStatus": "TO_BE_REPLY",
        "lastReplyTime": 67874,
        "closeType": "TIMEOUT",
        "createdDate": "2021-03-11T14:53:15Z",
        "createdBy": "Uganda"
    },
    {
        "id": 6,
        "feedbackType": "ADVICE",
        "title": "Expanded Sports compelling",
        "feedbackStatus": "TO_BE_REPLY",
        "lastReplyTime": 8032,
        "closeType": "TIMEOUT",
        "createdDate": "2021-03-12T03:53:46Z",
        "createdBy": "deposit Chicken mesh"
    },
    {
        "id": 7,
        "feedbackType": "ADVICE",
        "title": "Division overriding",
        "feedbackStatus": "TO_BE_REPLY",
        "lastReplyTime": 38000,
        "closeType": "NORMALLY",
        "createdDate": "2021-03-11T07:57:51Z",
        "createdBy": "Account stable"
    },
    {
        "id": 9,
        "feedbackType": "ADVICE",
        "title": "Loan",
        "feedbackStatus": "TO_BE_REPLY",
        "lastReplyTime": 99908,
        "closeType": "TIMEOUT",
        "createdDate": "2021-03-11T09:47:44Z",
        "createdBy": "Re-engineered"
    }
]

JHipster 管理界面介绍

JHipster 自动生成的前端代码里，包含了一些管理界面：

资源监控：

开发实践

更新实体增加字段

在项目的工程目录下，有一个.jhipster文件夹，里面包含了已有的实体。

要为实体增加字段，可以打开json文件，在fields里新增即可，比如我们增加一个content字段。

{
  "name": "FeedbackRecord",
  "fields": [
    {
      "fieldName": "feedbackType",
      "fieldType": "FeedbackType",
      "javadoc": "反馈类型",
      "fieldValues": "ADVICE,COMPLAINTS"
    },
    {
      "fieldName": "title",
      "fieldType": "String",
      "javadoc": "问题描述"
    },
    {
      "fieldName": "content",
      "fieldType": "String",
      "javadoc": "问题详情"
    },
    {
      "fieldName": "feedbackStatus",
      "fieldType": "FeedbackStatus",
      "javadoc": "反馈状态",
      "fieldValues": "TO_BE_SUBMIT,TO_BE_REPLY,TO_BE_CONFIRMED"
    },
    {
      "fieldName": "lastReplyTime",
      "fieldType": "Integer",
      "javadoc": "是否已完成"
    },
    {
      "fieldName": "closeType",
      "fieldType": "FeedbackCloseType",
      "javadoc": "关闭类型",
      "fieldValues": "NORMALLY,TIMEOUT"
    },
    {
      "fieldName": "createdDate",
      "fieldType": "Instant",
      "javadoc": "创建时间"
    },
    {
      "fieldName": "createdBy",
      "fieldType": "String",
      "javadoc": "创建者"
    }
  ],
  "relationships": [],
  "javadoc": "反馈记录表",
  "entityTableName": "feedback_record",
  "dto": "mapstruct",
  "pagination": "pagination",
  "service": "serviceImpl",
  "jpaMetamodelFiltering": true,
  "fluentMethods": true,
  "readOnly": false,
  "embedded": false,
  "applications": "*",
  "changelogDate": "20210312072243"
}

再次运行实体生成器：

jhipster entity FeedbackRecord

当您为现有实体运行实体子生成器时，系统会询问您“Do you want to update the entity? This will replace the existing files for this entity, all your custom code will be overwritten”(您确定需要更新实体吗？这将替换该实体的现有文件，所有自定义代码将被覆盖)，并具有以下选项：

• Yes, re generate the entity - 这将重新生成您的实体。提示：这可以通过在运行子生成器时传递--regenerate标志来强制执行
• Yes, add more fields and relationships - 这将需要您回答一些问题，以添加更多字段和关系
• Yes, remove fields and relationships - 这将需要您回答一些问题，以便从实体中删除现有字段和关系
• No, exit - 这将存在子生成器而无需更改任何内容

您可能由于以下原因而要更新您的实体：

提示：要立即重新生成所有实体，可以使用以下命令（不提供--force标识会在文件更改时询问覆盖选项）。

• Linux & Mac: for f inls .jhipster; do jhipster entity ${f%.*} --force ; done
• Windows: for %f in (.jhipster/*) do jhipster entity %~nf --force

代码示例