Spring Boot has the ability to utilize the Jackson library to read JSON files.<\/p>\n
Firstly, you need to add the Jackson library dependency in the pom.xml file.<\/p>\n
<dependencies<\/span>><\/span>\r\n <!-- \u6dfb\u52a0Jackson\u5e93\u4f9d\u8d56 --><\/span>\r\n <dependency<\/span>><\/span>\r\n <groupId<\/span>><\/span>com.fasterxml.jackson.core<\/groupId<\/span>><\/span>\r\n <artifactId<\/span>><\/span>jackson-databind<\/artifactId<\/span>><\/span>\r\n <\/dependency<\/span>><\/span>\r\n<\/dependencies<\/span>><\/span>\r\n<\/code><\/pre>\nThen, in the code of Spring Boot, use the ObjectMapper class to read the JSON file. Assume there is a file named data.json with the following content:<\/p>\n
{<\/span>\r\n \"name\"<\/span>:<\/span> \"John Doe\"<\/span>,<\/span>\r\n \"age\"<\/span>:<\/span> 30<\/span>,<\/span>\r\n \"email\"<\/span>:<\/span> \"john.doe@example.com\"<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\nYou can use the following code to read the JSON file:<\/p>\n
import<\/span> com.fasterxml.jackson.databind.ObjectMapper;\r\nimport<\/span> java.io.File;\r\nimport<\/span> java.io.IOException;\r\n\r\npublic<\/span> class<\/span> JsonReader<\/span> {\r\n\r\n public<\/span> static<\/span> void<\/span> main<\/span>(String[] args)<\/span> {\r\n ObjectMapper<\/span> objectMapper<\/span> =<\/span> new<\/span> ObjectMapper<\/span>();\r\n\r\n try<\/span> {\r\n \/\/ \u8bfb\u53d6JSON\u6587\u4ef6<\/span>\r\n File<\/span> file<\/span> =<\/span> new<\/span> File<\/span>(\"data.json\"<\/span>);\r\n\r\n \/\/ \u5c06JSON\u6587\u4ef6\u8f6c\u6362\u4e3aJava\u5bf9\u8c61<\/span>\r\n User<\/span> user<\/span> =<\/span> objectMapper.readValue(file, User.class);\r\n\r\n \/\/ \u6253\u5370Java\u5bf9\u8c61<\/span>\r\n System.out.println(user);\r\n\r\n } catch<\/span> (IOException e) {\r\n e.printStackTrace();\r\n }\r\n }\r\n}\r\n<\/code><\/pre>\nIn the code above, we used the readValue() method of the ObjectMapper to convert a JSON file into a Java object. In this example, we created a User class to represent the structure of the JSON file.<\/p>\n
public<\/span> class<\/span> User<\/span> {\r\n private<\/span> String name;\r\n private<\/span> int<\/span> age;\r\n private<\/span> String email;\r\n\r\n \/\/ getter\u548csetter\u65b9\u6cd5<\/span>\r\n\r\n