1. SpringBoot JSON工具包默认是Jackson，只需要引入spring-boot-starter-web依赖包，自动引入相应依赖包：
<dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> -->数据绑定依赖于下面两个包 <version>2.8.7</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> -->注解包 <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两种配置方式
A. application.properties文件
# 日期格式化
spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
# 日期时区
spring.jackson.time-zone=GMT+8
# 返回值null不显示
spring.jackson.default-property-inclusion=non_null
B. bean配置
package com.ruhuanxingyun.config;
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();
// 返回值过滤null或""值
objectMapper.setSerializationInclusion(JsonInclude.Include.NON_EMPTY).setSerializationInclusion(JsonInclude.Include.NON_NULL);
return objectMapper;
}
}