[org.springframework.web.HttpMediaTypeNotSupportedException:....

前端：data要注意值是json字符串，然后注意一下contentType的属性，如果你改送的是json

// 发送ajax请求
$.ajax({
    type: "post",
    url: "/demo/handle10",
    data: JSON.stringify({"id":"1923","name":"zhuangjie"}),
    dataType: "json",
    contentType:'application/json;charset=utf-8',
    success: function(result){
        console.log("ok",result);
    }

})

后端：不然也会报415

要加入依赖

    <!--json数据交互所需jar，start-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.0</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.9.0</version>