{"id":11897,"date":"2023-11-28T22:37:09","date_gmt":"2023-11-28T14:37:09","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11897"},"modified":"2023-12-11T14:37:37","modified_gmt":"2023-12-11T06:37:37","slug":"spring-zhongrequired-zhu-jie-you-shen-me-yong","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/spring-zhongrequired-zhu-jie-you-shen-me-yong\/","title":{"rendered":"Spring\u4e2d@Required\u6ce8\u89e3\u6709\u4ec0\u4e48\u7528\uff1f"},"content":{"rendered":"<p>\u5728 Spring \u4e2d\uff0c<code>@Required<\/code> \u6ce8\u89e3\u7528\u4e8e\u6807\u8bc6\u4e00\u4e2a Bean \u7684\u5c5e\u6027\u5fc5\u987b\u5728\u914d\u7f6e\u65f6\u8bbe\u7f6e\uff0c\u5426\u5219\u4f1a\u629b\u51fa <code>BeanInitializationException<\/code> \u5f02\u5e38\u3002\u8be5\u6ce8\u89e3\u901a\u5e38\u7528\u4e8e\u5f3a\u5236\u8981\u6c42\u5728\u914d\u7f6e\u4e2d\u4e3a\u7279\u5b9a\u7684 Bean \u5c5e\u6027\u63d0\u4f9b\u503c\uff0c\u4ee5\u786e\u4fdd\u5728\u5bb9\u5668\u542f\u52a8\u65f6\u8fd9\u4e9b\u5c5e\u6027\u4e0d\u4f1a\u88ab\u9057\u6f0f\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f <code>@Required<\/code> \u6ce8\u89e3\u7684\u4f7f\u7528\u793a\u4f8b\uff1a<\/p>\n<pre><code class=\"language-java\">public class MyBean {\n    private String requiredProperty;\n\n    @Required\n    public void setRequiredProperty(String requiredProperty) {\n        this.requiredProperty = requiredProperty;\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>MyBean<\/code> \u7c7b\u6709\u4e00\u4e2a\u540d\u4e3a <code>requiredProperty<\/code> \u7684\u5c5e\u6027\uff0c\u5e76\u4e14\u6709\u4e00\u4e2a setter \u65b9\u6cd5 <code>setRequiredProperty<\/code> \u4f7f\u7528\u4e86 <code>@Required<\/code> \u6ce8\u89e3\u3002\u8fd9\u8868\u793a\u5728\u5b9e\u4f8b\u5316 <code>MyBean<\/code> Bean \u65f6\uff0c\u5fc5\u987b\u901a\u8fc7\u914d\u7f6e\u6587\u4ef6\u6216\u5176\u4ed6\u65b9\u5f0f\u8bbe\u7f6e <code>requiredProperty<\/code> \u5c5e\u6027\u7684\u503c\u3002<\/p>\n<p>\u5982\u679c\u5728\u5bb9\u5668\u542f\u52a8\u65f6\u6ca1\u6709\u4e3a <code>requiredProperty<\/code> \u5c5e\u6027\u63d0\u4f9b\u503c\uff0c\u5c06\u629b\u51fa <code>BeanInitializationException<\/code> \u5f02\u5e38\uff0c\u4ece\u800c\u63d0\u9192\u5f00\u53d1\u8005\u914d\u7f6e\u8be5\u5c5e\u6027\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c<code>@Required<\/code> \u6ce8\u89e3\u5728 Spring 5.x \u7248\u672c\u4e2d\u5df2\u7ecf\u88ab\u6807\u8bb0\u4e3a\u8fc7\u65f6\uff08deprecated\uff09\uff0c\u5728\u65b0\u7684\u4ee3\u7801\u4e2d\u5efa\u8bae\u4f7f\u7528 JSR 303 \u6807\u51c6\u7684 <code>@NotNull<\/code> \u6ce8\u89e3\u6216 Spring \u63d0\u4f9b\u7684 <code>@Autowired(required = true)<\/code> \u4f5c\u4e3a\u66ff\u4ee3\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"language-java\">public class MyBean {\n    @NotNull\n    private String requiredProperty;\n\n    public void setRequiredProperty(String requiredProperty) {\n        this.requiredProperty = requiredProperty;\n    }\n}\n<\/code><\/pre>\n<p>\u6216\u8005\u4f7f\u7528 <code>@Autowired(required = true)<\/code>\uff1a<\/p>\n<pre><code class=\"language-java\">public class MyBean {\n    private String requiredProperty;\n\n    @Autowired(required = true)\n    public void setRequiredProperty(String requiredProperty) {\n        this.requiredProperty = requiredProperty;\n    }\n}\n<\/code><\/pre>\n<p>\u8fd9\u6837\u53ef\u4ee5\u8fbe\u5230\u76f8\u540c\u7684\u6548\u679c\uff0c\u5e76\u4e14\u66f4\u7b26\u5408\u5f53\u524d\u7684\u884c\u4e1a\u6807\u51c6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Spring \u4e2d\uff0c@Required \u6ce8\u89e3\u7528\u4e8e\u6807\u8bc6\u4e00\u4e2a Bean \u7684\u5c5e\u6027\u5fc5\u987b\u5728\u914d\u7f6e\u65f6\u8bbe\u7f6e\uff0c\u5426\u5219\u4f1a\u629b\u51fa Be [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[],"class_list":["post-11897","post","type-post","status-publish","format-standard","hentry","category-spring"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11897","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=11897"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11897\/revisions"}],"predecessor-version":[{"id":37201,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11897\/revisions\/37201"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11897"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11897"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11897"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}