{"id":1728,"date":"2025-01-15T17:32:26","date_gmt":"2025-01-15T09:32:26","guid":{"rendered":"https:\/\/note.ui11.cc\/?p=1728"},"modified":"2025-01-15T17:32:27","modified_gmt":"2025-01-15T09:32:27","slug":"povodto%e5%90%84%e4%b8%aa%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/note.ui11.cc\/index.php\/2025\/01\/15\/povodto%e5%90%84%e4%b8%aa%e5%8c%ba%e5%88%ab\/","title":{"rendered":"po,vo,dto\u5404\u4e2a\u533a\u522b"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\"><strong>&nbsp;PO (Persistent Object)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5168\u79f0<\/strong>\uff1aPersistent Object\uff08\u6301\u4e45\u5316\u5bf9\u8c61\uff09\u3002<\/li>\n\n\n\n<li><strong>\u7528\u9014<\/strong>\uff1a\u7528\u4e8e\u4e0e\u6570\u636e\u5e93\u8868\u76f4\u63a5\u6620\u5c04\u7684\u5bf9\u8c61\u3002<\/li>\n\n\n\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u901a\u5e38\u4e0e\u6570\u636e\u5e93\u8868\u4e00\u4e00\u5bf9\u5e94\u3002<\/li>\n\n\n\n<li>\u5305\u542b\u4e0e\u6570\u636e\u5e93\u5b57\u6bb5\u5bf9\u5e94\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/li>\n\n\n\n<li>\u7528\u4e8e ORM\uff08\u5bf9\u8c61\u5173\u7cfb\u6620\u5c04\uff09\u6846\u67b6\uff08\u5982 MyBatis\u3001Hibernate\uff09\u64cd\u4f5c\u6570\u636e\u5e93\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>public class UserPO {\n    private Long id;\n    private String username;\n    private String password;\n    private Date createTime;\n\n    \/\/ Getter \u548c Setter \u65b9\u6cd5\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>&nbsp;DTO (Data Transfer Object)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5168\u79f0<\/strong>\uff1aData Transfer Object\uff08\u6570\u636e\u4f20\u8f93\u5bf9\u8c61\uff09\u3002<\/li>\n\n\n\n<li><strong>\u7528\u9014<\/strong>\uff1a\u7528\u4e8e\u5728\u4e0d\u540c\u5c42\uff08\u5982 Controller \u5c42\u548c Service \u5c42\uff09\u4e4b\u95f4\u4f20\u8f93\u6570\u636e\u3002<\/li>\n\n\n\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li>\u901a\u5e38\u4e0d\u5305\u542b\u4e1a\u52a1\u903b\u8f91\u3002<\/li>\n\n\n\n<li>\u7528\u4e8e\u5c01\u88c5\u591a\u4e2a\u5b57\u6bb5\uff0c\u51cf\u5c11\u7f51\u7edc\u4f20\u8f93\u6b21\u6570\u3002<\/li>\n\n\n\n<li>\u53ef\u4ee5\u6839\u636e\u9700\u8981\u7ec4\u5408\u6216\u62c6\u5206\u6570\u636e<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>public class UserDTO {\n    private Long id;\n    private String username;\n    private String email;\n\n    \/\/ Getter \u548c Setter \u65b9\u6cd5\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. VO \u7684\u5b9a\u4e49<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5168\u79f0<\/strong>\uff1aValue Object\uff08\u503c\u5bf9\u8c61\uff09\u3002<\/li>\n\n\n\n<li><strong>\u7528\u9014<\/strong>\uff1a\u7528\u4e8e\u5c01\u88c5\u4e00\u7ec4\u76f8\u5173\u7684\u6570\u636e\uff0c\u901a\u5e38\u8868\u793a\u67d0\u4e2a\u7279\u5b9a\u7684\u503c\u6216\u6982\u5ff5\u3002<\/li>\n\n\n\n<li><strong>\u7279\u70b9<\/strong>\uff1a\n<ul class=\"wp-block-list\">\n<li><strong>\u4e0d\u53ef\u53d8\u6027<\/strong>\uff1aVO \u5bf9\u8c61\u4e00\u65e6\u521b\u5efa\uff0c\u5176\u5c5e\u6027\u503c\u4e0d\u53ef\u66f4\u6539\u3002<\/li>\n\n\n\n<li><strong>\u503c\u76f8\u7b49\u6027<\/strong>\uff1a\u4e24\u4e2a VO \u5bf9\u8c61\u5982\u679c\u5c5e\u6027\u503c\u76f8\u540c\uff0c\u5219\u8ba4\u4e3a\u5b83\u4eec\u662f\u76f8\u7b49\u7684\u3002<\/li>\n\n\n\n<li><strong>\u65e0\u884c\u4e3a<\/strong>\uff1aVO \u901a\u5e38\u4e0d\u5305\u542b\u4e1a\u52a1\u903b\u8f91\uff0c\u4ec5\u7528\u4e8e\u5b58\u50a8\u6570\u636e\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. VO \u7684\u4f7f\u7528\u573a\u666f<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u8868\u793a\u67d0\u4e2a\u5177\u4f53\u7684\u503c<\/strong>\uff1a\u4f8b\u5982\uff0c\u8d27\u5e01\u91d1\u989d\u3001\u65e5\u671f\u8303\u56f4\u3001\u5750\u6807\u70b9\u7b49\u3002<\/li>\n\n\n\n<li><strong>\u5c01\u88c5\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784<\/strong>\uff1a\u4f8b\u5982\uff0c\u5730\u5740\u4fe1\u606f\u3001\u989c\u8272\u503c\u7b49\u3002<\/li>\n\n\n\n<li><strong>\u7528\u4e8e\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\uff08DDD\uff09<\/strong>\uff1a\u5728 DDD \u4e2d\uff0cVO \u7528\u4e8e\u8868\u793a\u9886\u57df\u6a21\u578b\u4e2d\u7684\u503c\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. VO \u7684\u793a\u4f8b<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\uff081\uff09\u7b80\u5355\u7684 VO<\/strong><\/h4>\n\n\n\n<p>java<\/p>\n\n\n\n<p>\u590d\u5236<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">public class Money {\n    private final BigDecimal amount;\n    private final String currency;\n\n    public Money(BigDecimal amount, String currency) {\n        this.amount = amount;\n        this.currency = currency;\n    }\n\n    public BigDecimal getAmount() {\n        return amount;\n    }\n\n    public String getCurrency() {\n        return currency;\n    }\n\n    @Override\n    public boolean equals(Object o) {\n        if (this == o) return true;\n        if (o == null || getClass() != o.getClass()) return false;\n        Money money = (Money) o;\n        return Objects.equals(amount, money.amount) &amp;&amp; Objects.equals(currency, money.currency);\n    }\n\n    @Override\n    public int hashCode() {\n        return Objects.hash(amount, currency);\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\uff082\uff09\u590d\u6742\u7684 VO<\/strong><\/h4>\n\n\n\n<p>java<\/p>\n\n\n\n<p>\u590d\u5236<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">public class Address {\n    private final String street;\n    private final String city;\n    private final String postalCode;\n    private final String country;\n\n    public Address(String street, String city, String postalCode, String country) {\n        this.street = street;\n        this.city = city;\n        this.postalCode = postalCode;\n        this.country = country;\n    }\n\n    \/\/ Getter \u65b9\u6cd5\n\n    @Override\n    public boolean equals(Object o) {\n        if (this == o) return true;\n        if (o == null || getClass() != o.getClass()) return false;\n        Address address = (Address) o;\n        return Objects.equals(street, address.street) &amp;&amp;\n                Objects.equals(city, address.city) &amp;&amp;\n                Objects.equals(postalCode, address.postalCode) &amp;&amp;\n                Objects.equals(country, address.country);\n    }\n\n    @Override\n    public int hashCode() {\n        return Objects.hash(street, city, postalCode, country);\n    }\n}<\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. VO \u4e0e\u5176\u4ed6\u5bf9\u8c61\u7c7b\u578b\u7684\u533a\u522b<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7c7b\u578b<\/th><th>\u5168\u79f0<\/th><th>\u7528\u9014<\/th><th>\u7279\u70b9<\/th><th>\u793a\u4f8b\u573a\u666f<\/th><\/tr><\/thead><tbody><tr><td>PO<\/td><td>Persistent Object<\/td><td>\u4e0e\u6570\u636e\u5e93\u8868\u76f4\u63a5\u6620\u5c04\u7684\u5bf9\u8c61<\/td><td>\u4e0e\u6570\u636e\u5e93\u5b57\u6bb5\u4e00\u4e00\u5bf9\u5e94\uff0c\u7528\u4e8e ORM \u64cd\u4f5c<\/td><td>MyBatis\u3001Hibernate \u4e2d\u7684\u5b9e\u4f53\u7c7b<\/td><\/tr><tr><td>DTO<\/td><td>Data Transfer Object<\/td><td>\u5728\u4e0d\u540c\u5c42\u4e4b\u95f4\u4f20\u8f93\u6570\u636e<\/td><td>\u4e0d\u5305\u542b\u4e1a\u52a1\u903b\u8f91\uff0c\u7528\u4e8e\u5c01\u88c5\u6570\u636e<\/td><td>Controller \u5c42\u4e0e Service \u5c42\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93<\/td><\/tr><tr><td>VO<\/td><td>Value Object<\/td><td>\u5c01\u88c5\u4e00\u7ec4\u76f8\u5173\u7684\u6570\u636e\uff0c\u8868\u793a\u67d0\u4e2a\u503c<\/td><td>\u4e0d\u53ef\u53d8\uff0c\u503c\u76f8\u7b49\u6027\uff0c\u65e0\u884c\u4e3a<\/td><td>\u8d27\u5e01\u91d1\u989d\u3001\u5730\u5740\u4fe1\u606f\u3001\u5750\u6807\u70b9\u7b49<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. VO \u7684\u4f18\u70b9<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4e0d\u53ef\u53d8\u6027<\/strong>\uff1a\u786e\u4fdd\u6570\u636e\u7684\u5b89\u5168\u6027\uff0c\u907f\u514d\u88ab\u610f\u5916\u4fee\u6539\u3002<\/li>\n\n\n\n<li><strong>\u503c\u76f8\u7b49\u6027<\/strong>\uff1a\u7b80\u5316\u5bf9\u8c61\u7684\u6bd4\u8f83\u903b\u8f91\u3002<\/li>\n\n\n\n<li><strong>\u8bed\u4e49\u6e05\u6670<\/strong>\uff1a\u901a\u8fc7 VO \u53ef\u4ee5\u66f4\u6e05\u6670\u5730\u8868\u8fbe\u4e1a\u52a1\u6982\u5ff5\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>6. \u5b9e\u9645\u5e94\u7528\u793a\u4f8b<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\uff081\uff09\u8868\u793a\u8d27\u5e01\u91d1\u989d<\/strong><\/h4>\n\n\n\n<p>java<\/p>\n\n\n\n<p>\u590d\u5236<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">public class Money {\n    private final BigDecimal amount;\n    private final String currency;\n\n    public Money(BigDecimal amount, String currency) {\n        this.amount = amount;\n        this.currency = currency;\n    }\n\n    public BigDecimal getAmount() {\n        return amount;\n    }\n\n    public String getCurrency() {\n        return currency;\n    }\n\n    @Override\n    public boolean equals(Object o) {\n        if (this == o) return true;\n        if (o == null || getClass() != o.getClass()) return false;\n        Money money = (Money) o;\n        return Objects.equals(amount, money.amount) &amp;&amp; Objects.equals(currency, money.currency);\n    }\n\n    @Override\n    public int hashCode() {\n        return Objects.hash(amount, currency);\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\uff082\uff09\u8868\u793a\u65e5\u671f\u8303\u56f4<\/strong><\/h4>\n\n\n\n<p>java<\/p>\n\n\n\n<p>\u590d\u5236<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">public class DateRange {\n    private final LocalDate startDate;\n    private final LocalDate endDate;\n\n    public DateRange(LocalDate startDate, LocalDate endDate) {\n        this.startDate = startDate;\n        this.endDate = endDate;\n    }\n\n    public LocalDate getStartDate() {\n        return startDate;\n    }\n\n    public LocalDate getEndDate() {\n        return endDate;\n    }\n\n    @Override\n    public boolean equals(Object o) {\n        if (this == o) return true;\n        if (o == null || getClass() != o.getClass()) return false;\n        DateRange dateRange = (DateRange) o;\n        return Objects.equals(startDate, dateRange.startDate) &amp;&amp; Objects.equals(endDate, dateRange.endDate);\n    }\n\n    @Override\n    public int hashCode() {\n        return Objects.hash(startDate, endDate);\n    }\n}<\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>VO<\/strong>\u00a0\u662f\u4e00\u79cd\u7528\u4e8e\u5c01\u88c5\u6570\u636e\u7684\u5bf9\u8c61\u7c7b\u578b\uff0c\u5177\u6709\u4e0d\u53ef\u53d8\u6027\u548c\u503c\u76f8\u7b49\u6027\u3002<\/li>\n\n\n\n<li>\u5b83\u901a\u5e38\u7528\u4e8e\u8868\u793a\u67d0\u4e2a\u5177\u4f53\u7684\u503c\u6216\u6982\u5ff5\uff08\u5982\u8d27\u5e01\u91d1\u989d\u3001\u5730\u5740\u4fe1\u606f\u7b49\uff09\u3002<\/li>\n\n\n\n<li>\u4e0e\u00a0<code>PO<\/code>\u00a0\u548c\u00a0<code>DTO<\/code>\u00a0\u4e0d\u540c\uff0c<code>VO<\/code>\u00a0\u66f4\u6ce8\u91cd\u6570\u636e\u7684\u5c01\u88c5\u548c\u8bed\u4e49\u8868\u8fbe\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u5408\u7406\u4f7f\u7528&nbsp;<code>VO<\/code>&nbsp;\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u7279\u522b\u662f\u5728\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\uff08DDD\uff09\u4e2d\uff0c<code>VO<\/code>&nbsp;\u662f\u8868\u793a\u9886\u57df\u6a21\u578b\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. VO \u7684\u4f7f\u7528\u573a\u666f<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u8868\u793a\u67d0\u4e2a\u5177\u4f53\u7684\u503c<\/strong>\uff1a\u4f8b\u5982\uff0c\u8d27\u5e01\u91d1\u989d\u3001\u65e5\u671f\u8303\u56f4\u3001\u5750\u6807\u70b9\u7b49\u3002<\/li>\n\n\n\n<li><strong>\u5c01\u88c5\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784<\/strong>\uff1a\u4f8b\u5982\uff0c\u5730\u5740\u4fe1\u606f\u3001\u989c\u8272\u503c\u7b49\u3002<\/li>\n\n\n\n<li><strong>\u7528\u4e8e\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\uff08DDD\uff09<\/strong>\uff1a\u5728 DDD \u4e2d\uff0cVO \u7528\u4e8e\u8868\u793a\u9886\u57df\u6a21\u578b\u4e2d\u7684\u503c\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. VO \u4e0e\u5176\u4ed6\u5bf9\u8c61\u7c7b\u578b\u7684\u533a\u522b<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7c7b\u578b<\/th><th>\u5168\u79f0<\/th><th>\u7528\u9014<\/th><th>\u7279\u70b9<\/th><th>\u793a\u4f8b\u573a\u666f<\/th><\/tr><\/thead><tbody><tr><td>PO<\/td><td>Persistent Object<\/td><td>\u4e0e\u6570\u636e\u5e93\u8868\u76f4\u63a5\u6620\u5c04\u7684\u5bf9\u8c61<\/td><td>\u4e0e\u6570\u636e\u5e93\u5b57\u6bb5\u4e00\u4e00\u5bf9\u5e94\uff0c\u7528\u4e8e ORM \u64cd\u4f5c<\/td><td>MyBatis\u3001Hibernate \u4e2d\u7684\u5b9e\u4f53\u7c7b<\/td><\/tr><tr><td>DTO<\/td><td>Data Transfer Object<\/td><td>\u5728\u4e0d\u540c\u5c42\u4e4b\u95f4\u4f20\u8f93\u6570\u636e<\/td><td>\u4e0d\u5305\u542b\u4e1a\u52a1\u903b\u8f91\uff0c\u7528\u4e8e\u5c01\u88c5\u6570\u636e<\/td><td>Controller \u5c42\u4e0e Service \u5c42\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93<\/td><\/tr><tr><td>VO<\/td><td>Value Object<\/td><td>\u5c01\u88c5\u4e00\u7ec4\u76f8\u5173\u7684\u6570\u636e\uff0c\u8868\u793a\u67d0\u4e2a\u503c<\/td><td>\u4e0d\u53ef\u53d8\uff0c\u503c\u76f8\u7b49\u6027\uff0c\u65e0\u884c\u4e3a<\/td><td>\u8d27\u5e01\u91d1\u989d\u3001\u5730\u5740\u4fe1\u606f\u3001\u5750\u6807\u70b9\u7b49<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. VO \u7684\u4f18\u70b9<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u4e0d\u53ef\u53d8\u6027<\/strong>\uff1a\u786e\u4fdd\u6570\u636e\u7684\u5b89\u5168\u6027\uff0c\u907f\u514d\u88ab\u610f\u5916\u4fee\u6539\u3002<\/li>\n\n\n\n<li><strong>\u503c\u76f8\u7b49\u6027<\/strong>\uff1a\u7b80\u5316\u5bf9\u8c61\u7684\u6bd4\u8f83\u903b\u8f91\u3002<\/li>\n\n\n\n<li><strong>\u8bed\u4e49\u6e05\u6670<\/strong>\uff1a\u901a\u8fc7 VO \u53ef\u4ee5\u66f4\u6e05\u6670\u5730\u8868\u8fbe\u4e1a\u52a1\u6982\u5ff5\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>6. \u5b9e\u9645\u5e94\u7528\u793a\u4f8b<\/strong><\/h3>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\uff081\uff09\u8868\u793a\u8d27\u5e01\u91d1\u989d<\/strong><\/h4>\n\n\n\n<p>java<\/p>\n\n\n\n<p>\u590d\u5236<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">public class Money {\n    private final BigDecimal amount;\n    private final String currency;\n\n    public Money(BigDecimal amount, String currency) {\n        this.amount = amount;\n        this.currency = currency;\n    }\n\n    public BigDecimal getAmount() {\n        return amount;\n    }\n\n    public String getCurrency() {\n        return currency;\n    }\n\n    @Override\n    public boolean equals(Object o) {\n        if (this == o) return true;\n        if (o == null || getClass() != o.getClass()) return false;\n        Money money = (Money) o;\n        return Objects.equals(amount, money.amount) &amp;&amp; Objects.equals(currency, money.currency);\n    }\n\n    @Override\n    public int hashCode() {\n        return Objects.hash(amount, currency);\n    }\n}<\/pre>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>\uff082\uff09\u8868\u793a\u65e5\u671f\u8303\u56f4<\/strong><\/h4>\n\n\n\n<p>java<\/p>\n\n\n\n<p>\u590d\u5236<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">public class DateRange {\n    private final LocalDate startDate;\n    private final LocalDate endDate;\n\n    public DateRange(LocalDate startDate, LocalDate endDate) {\n        this.startDate = startDate;\n        this.endDate = endDate;\n    }\n\n    public LocalDate getStartDate() {\n        return startDate;\n    }\n\n    public LocalDate getEndDate() {\n        return endDate;\n    }\n\n    @Override\n    public boolean equals(Object o) {\n        if (this == o) return true;\n        if (o == null || getClass() != o.getClass()) return false;\n        DateRange dateRange = (DateRange) o;\n        return Objects.equals(startDate, dateRange.startDate) &amp;&amp; Objects.equals(endDate, dateRange.endDate);\n    }\n\n    @Override\n    public int hashCode() {\n        return Objects.hash(startDate, endDate);\n    }\n}<\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>7. \u603b\u7ed3<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>VO<\/strong>\u00a0\u662f\u4e00\u79cd\u7528\u4e8e\u5c01\u88c5\u6570\u636e\u7684\u5bf9\u8c61\u7c7b\u578b\uff0c\u5177\u6709\u4e0d\u53ef\u53d8\u6027\u548c\u503c\u76f8\u7b49\u6027\u3002<\/li>\n\n\n\n<li>\u5b83\u901a\u5e38\u7528\u4e8e\u8868\u793a\u67d0\u4e2a\u5177\u4f53\u7684\u503c\u6216\u6982\u5ff5\uff08\u5982\u8d27\u5e01\u91d1\u989d\u3001\u5730\u5740\u4fe1\u606f\u7b49\uff09\u3002<\/li>\n\n\n\n<li>\u4e0e\u00a0<code>PO<\/code>\u00a0\u548c\u00a0<code>DTO<\/code>\u00a0\u4e0d\u540c\uff0c<code>VO<\/code>\u00a0\u66f4\u6ce8\u91cd\u6570\u636e\u7684\u5c01\u88c5\u548c\u8bed\u4e49\u8868\u8fbe\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u5408\u7406\u4f7f\u7528&nbsp;<code>VO<\/code>&nbsp;\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u7279\u522b\u662f\u5728\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\uff08DDD\uff09\u4e2d\uff0c<code>VO<\/code>&nbsp;\u662f\u8868\u793a\u9886\u57df\u6a21\u578b\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. VO \u4e0e\u5176\u4ed6\u5bf9\u8c61\u7c7b\u578b\u7684\u533a\u522b<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7c7b\u578b<\/th><th>\u5168\u79f0<\/th><th>\u7528\u9014<\/th><th>\u7279\u70b9<\/th><th>\u793a\u4f8b\u573a\u666f<\/th><\/tr><\/thead><tbody><tr><td>PO<\/td><td>Persistent Object<\/td><td>\u4e0e\u6570\u636e\u5e93\u8868\u76f4\u63a5\u6620\u5c04\u7684\u5bf9\u8c61<\/td><td>\u4e0e\u6570\u636e\u5e93\u5b57\u6bb5\u4e00\u4e00\u5bf9\u5e94\uff0c\u7528\u4e8e ORM \u64cd\u4f5c<\/td><td>MyBatis\u3001Hibernate \u4e2d\u7684\u5b9e\u4f53\u7c7b<\/td><\/tr><tr><td>DTO<\/td><td>Data Transfer Object<\/td><td>\u5728\u4e0d\u540c\u5c42\u4e4b\u95f4\u4f20\u8f93\u6570\u636e<\/td><td>\u4e0d\u5305\u542b\u4e1a\u52a1\u903b\u8f91\uff0c\u7528\u4e8e\u5c01\u88c5\u6570\u636e<\/td><td>Controller \u5c42\u4e0e Service \u5c42\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u8f93<\/td><\/tr><tr><td>VO<\/td><td>Value Object<\/td><td>\u5c01\u88c5\u4e00\u7ec4\u76f8\u5173\u7684\u6570\u636e\uff0c\u8868\u793a\u67d0\u4e2a\u503c<\/td><td>\u4e0d\u53ef\u53d8\uff0c\u503c\u76f8\u7b49\u6027\uff0c\u65e0\u884c\u4e3a<\/td><td>\u8d27\u5e01\u91d1\u989d\u3001\u5730\u5740\u4fe1\u606f\u3001\u5750\u6807\u70b9\u7b49<\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp;PO (Persistent Object) &nbsp;DTO (Data Transfer O [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1728","post","type-post","status-publish","format-standard","hentry","category-javase"],"_links":{"self":[{"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/posts\/1728","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/comments?post=1728"}],"version-history":[{"count":1,"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/posts\/1728\/revisions"}],"predecessor-version":[{"id":1732,"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/posts\/1728\/revisions\/1732"}],"wp:attachment":[{"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/media?parent=1728"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/categories?post=1728"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/note.ui11.cc\/index.php\/wp-json\/wp\/v2\/tags?post=1728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}