{"id":25995,"date":"2024-03-16T06:00:17","date_gmt":"2024-03-16T06:00:17","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-convert-two-java-entity-classes-to-each-other\/"},"modified":"2024-03-22T07:31:11","modified_gmt":"2024-03-22T07:31:11","slug":"how-to-convert-two-java-entity-classes-to-each-other","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-convert-two-java-entity-classes-to-each-other\/","title":{"rendered":"How to convert two Java entity classes to each other?"},"content":{"rendered":"<p>In Java, the following methods can be used to achieve mutual conversion between two entity classes:<\/p>\n<ol>\n<li>Manually convert: Create a new entity class object, and then set the property values of the new entity class object using the property values of the source entity class object.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">EntityA<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-type\">int<\/span> id;\r\n    <span class=\"hljs-keyword\">private<\/span> String name;\r\n    \r\n    <span class=\"hljs-comment\">\/\/ getters and setters<\/span>\r\n}\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">EntityB<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-type\">int<\/span> id;\r\n    <span class=\"hljs-keyword\">private<\/span> String name;\r\n    \r\n    <span class=\"hljs-comment\">\/\/ getters and setters<\/span>\r\n}\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5c06EntityA\u8f6c\u6362\u4e3aEntityB<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> EntityB <span class=\"hljs-title function_\">convertToEntityB<\/span><span class=\"hljs-params\">(EntityA entityA)<\/span> {\r\n    <span class=\"hljs-type\">EntityB<\/span> <span class=\"hljs-variable\">entityB<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">EntityB<\/span>();\r\n    entityB.setId(entityA.getId());\r\n    entityB.setName(entityA.getName());\r\n    <span class=\"hljs-keyword\">return<\/span> entityB;\r\n}\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5c06EntityB\u8f6c\u6362\u4e3aEntityA<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> EntityA <span class=\"hljs-title function_\">convertToEntityA<\/span><span class=\"hljs-params\">(EntityB entityB)<\/span> {\r\n    <span class=\"hljs-type\">EntityA<\/span> <span class=\"hljs-variable\">entityA<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">EntityA<\/span>();\r\n    entityA.setId(entityB.getId());\r\n    entityA.setName(entityB.getName());\r\n    <span class=\"hljs-keyword\">return<\/span> entityA;\r\n}\r\n<\/code><\/pre>\n<ol>\n<li>Utilizing a third-party library, such as ModelMapper, can automatically convert property values between two entity classes.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-comment\">\/\/ \u6dfb\u52a0ModelMapper\u4f9d\u8d56\u5e93<\/span>\r\n&lt;dependency&gt;\r\n    &lt;groupId&gt;org.modelmapper&lt;\/groupId&gt;\r\n    &lt;artifactId&gt;modelmapper&lt;\/artifactId&gt;\r\n    &lt;version&gt;<span class=\"hljs-number\">2.3<\/span><span class=\"hljs-number\">.8<\/span>&lt;\/version&gt;\r\n&lt;\/dependency&gt;\r\n\r\n<span class=\"hljs-comment\">\/\/ \u4f7f\u7528ModelMapper\u8fdb\u884c\u8f6c\u6362<\/span>\r\n<span class=\"hljs-keyword\">import<\/span> org.modelmapper.ModelMapper;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">EntityA<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-type\">int<\/span> id;\r\n    <span class=\"hljs-keyword\">private<\/span> String name;\r\n    \r\n    <span class=\"hljs-comment\">\/\/ getters and setters<\/span>\r\n}\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">EntityB<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-type\">int<\/span> id;\r\n    <span class=\"hljs-keyword\">private<\/span> String name;\r\n    \r\n    <span class=\"hljs-comment\">\/\/ getters and setters<\/span>\r\n}\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5c06EntityA\u8f6c\u6362\u4e3aEntityB<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> EntityB <span class=\"hljs-title function_\">convertToEntityB<\/span><span class=\"hljs-params\">(EntityA entityA)<\/span> {\r\n    <span class=\"hljs-type\">ModelMapper<\/span> <span class=\"hljs-variable\">modelMapper<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ModelMapper<\/span>();\r\n    <span class=\"hljs-type\">EntityB<\/span> <span class=\"hljs-variable\">entityB<\/span> <span class=\"hljs-operator\">=<\/span> modelMapper.map(entityA, EntityB.class);\r\n    <span class=\"hljs-keyword\">return<\/span> entityB;\r\n}\r\n\r\n<span class=\"hljs-comment\">\/\/ \u5c06EntityB\u8f6c\u6362\u4e3aEntityA<\/span>\r\n<span class=\"hljs-keyword\">public<\/span> EntityA <span class=\"hljs-title function_\">convertToEntityA<\/span><span class=\"hljs-params\">(EntityB entityB)<\/span> {\r\n    <span class=\"hljs-type\">ModelMapper<\/span> <span class=\"hljs-variable\">modelMapper<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ModelMapper<\/span>();\r\n    <span class=\"hljs-type\">EntityA<\/span> <span class=\"hljs-variable\">entityA<\/span> <span class=\"hljs-operator\">=<\/span> modelMapper.map(entityB, EntityA.class);\r\n    <span class=\"hljs-keyword\">return<\/span> entityA;\r\n}\r\n<\/code><\/pre>\n<p>One of the two methods mentioned above can be chosen based on specific needs to achieve mutual conversion between entity classes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In Java, the following methods can be used to achieve mutual conversion between two entity classes: Manually convert: Create a new entity class object, and then set the property values of the new entity class object using the property values of the source entity class object. public class EntityA { private int id; private String [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-25995","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium 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