SpringBoot制定返回格式

JSON是：
用produces制定返回格式：

@RequestMapping(value = "v1/open/BaseData",produces = MediaType.APPLICATION_JSON_VALUE)

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.6.0</version>
</dependency>

XML是：

<dependency>
    <groupId>com.fasterxml.jackson.dataformat</groupId>
    <artifactId>jackson-dataformat-xml</artifactId>
    <version>2.6.0</version>
</dependency>