Spring Boot 配置使用 gson 替代jackson
第一步，修改pom.xml配置文件
在添加SpringBoot web依赖的地方将jackson的包去掉：
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<artifactId>jackson-databind</artifactId>
<groupId>com.fasterxml.jackson.core</groupId>
</exclusion>
</exclusions>
</dependency>
第二步，添加一个自定义的HttpMessageConverter
@Configuration
@ConditionalOnClass(Gson.class)
@ConditionalOnMissingClass("com.fasterxml.jackson.core.JsonGenerator")
@ConditionalOnBean(Gson.class)
public class GsonHttpMessageConverterConfiguration {
@Bean
@ConditionalOnMissingBean
public GsonHttpMessageConverter gsonHttpMessageConverter(Gson gson) {
GsonHttpMessageConverter converter = new GsonHttpMessageConverter();
converter.setGson(gson);
return converter;
}
}
第三步，修改启动方法
@SpringBootApplication
@EnableAutoConfiguration(exclude = { JacksonAutoConfiguration.class })
public class Langrenshaplusbackground2Application {
public static void main(String[] args) {
SpringApplication.run(Langrenshaplusbackground2Application.class, args);
}
}
第四步，修改application.properties
# Preferred JSON mapper to use for HTTP message conversion.
spring.http.converters.preferred-json-mapper=gson
其他配置项
# GSON (GsonProperties)
# Format to use when serializing Date objects.
spring.gson.date-format=
# Whether to disable the escaping of HTML characters such as '<', '>', etc.
spring.gson.disable-html-escaping=
# Whether to exclude inner classes during serialization.
spring.gson.disable-inner-class-serialization=
# Whether to enable serialization of complex map keys (i.e. non-primitives).
spring.gson.enable-complex-map-key-serialization=
# Whether to exclude all fields from consideration for serialization or deserialization that do not have the "Expose" annotation.
spring.gson.exclude-fields-without-expose-annotation=
# Naming policy that should be applied to an object's field during serialization and deserialization.
spring.gson.field-naming-policy=
# Whether to generate non executable JSON by prefixing the output with some special text.
spring.gson.generate-non-executable-json=
# Whether to be lenient about parsing JSON that doesn't conform to RFC 4627.
spring.gson.lenient=
# Serialization policy for Long and long types.
spring.gson.long-serialization-policy=
# Whether to output serialized JSON that fits in a page for pretty printing.
spring.gson.pretty-printing=
# Whether to serialize null fields.
spring.gson.serialize-nulls=
备注
If you want to get rid of Jackson completely then you can exclude it from spring-boot-starter-web dependency in the pom.xml file like so -
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<!-- Exclude the default Jackson dependency -->
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-json</artifactId>
</exclusion>
</exclusions>
</dependency>
