@responsebody 注解
返回json格式
需要添加 三个包
1.jackson-core
2.jackson-databind
3.jackson-annotations
缺少jackson-annotations 则会报错
java.lang.NoClassDefFoundError: com/fasterxml/jackson/core/JsonProcessingException
maven依赖
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.1.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.1.0</version>
</dependency> 