SpringMvc中使用json报错415：源服务器拒绝服务请求，因为有效负载的格式在目标资源上此方法不支持。

已经导入了jackson依赖

<dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.9</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.9.9</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>2.9.9</version>
    </dependency>

简单java类

public class item implements Serializable {
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public item(String name) {
        this.name = name;
    }
}

控制器类

@RequestMapping(path = "/testAjax",method = RequestMethod.POST)
    @ResponseBody
    public void testAjax(@RequestBody item test){
        System.out.println("testAjax方法执行了.....");
                System.out.println(test);
    }

ajax请求

 $.ajax({
                    url:"/test/testAjax",
                    contentType:"application/json;charset=UTF-8",
                    data:JSON.stringify({"name":"shadow"}),
                    dataType:"json",
                    type:"POST",
                    success:function (data) {
                        alert("username"+ data.name);
                    },
                });

https://blog.csdn.net/huang_xin2016/article/details/80403085