SpringMvc使用Json（Java配置方式）

<dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.8.11</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.8.11</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.8.11</version>
    </dependency>

@RequestMapping(value = "/register",method = RequestMethod.POST)
    @ResponseBody
    public User register(@RequestBody User user){
        System.out.println(user);

        return user;
    }

{
    "username": "dale",
    "password" : "123456"
}

{
    "username": "dale",
    "password" : "123456"
}