Springboot JackSon

1. SpringBoot JSON工具包默認是Jackson，只須要引入spring-boot-starter-web依賴包，自動引入相應依賴包：web

<dependency>

        <groupId>com.fasterxml.jackson.core</groupId>

        <artifactId>jackson-databind</artifactId> -->數據綁定依賴於下面兩個包 <version>2.8.7</version>

</dependency>

<dependency>

        <groupId>com.fasterxml.jackson.core</groupId>

        <artifactId>jackson-annotations</artifactId> -->註解包 <version>2.8.0</version>

</dependency>

<dependency>

        <groupId>com.fasterxml.jackson.core</groupId>

        <artifactId>jackson-core</artifactId> -->核心包 <version>2.8.7</version>

</dependency>

2. Jackson兩種配置方式spring

　　A. application.properties文件json

# 日期格式化 spring.jackson.date-format=yyyy-MM-dd HH:mm:ss # 日期時區 spring.jackson.time-zone=GMT+8 # 返回值null不顯示 spring.jackson.default-property-inclusion=non_null

　　B. bean配置app

import com.fasterxml.jackson.annotation.JsonInclude; import com.fasterxml.jackson.databind.ObjectMapper; import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder; @Configuration public class JacksonConfig { @Bean @Primary @ConditionalOnMissingBean(ObjectMapper.class) public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) { ObjectMapper objectMapper = builder.createXmlMapper(false).build(); // 返回值過濾null或""值
 objectMapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY).setSerializationInclusion(JsonInclude.Include.NON_NULL); return objectMapper; } }