Java org.springframework.web.HttpMediaTypeNotSupportedException:内容类型'；application/json'；不支持（Ajax、Spring）

我正在尝试发送PUT请求。我有Serializable类和控制器以及必要的设置，我的请求有contentType:“application/json”

飞行目的地：

 public class FlightDto implements Serializable {
    private int id;
    private String navigation;

    public FlightDto() {
        super();
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getNavigation() {
        return navigation;
    }

    public void setNavigation(String navigation) {
        this.navigation = navigation;
    }

}

  function editNavigation() {
    var flight={
        id:idAction.replace('edit',''),
        navigation:newNavigation
    };
    console.log(flight);
    var prefix = '/airline/';
    $.ajax({
        type: 'PUT',
        url: prefix +'flights/' + idAction.replace('edit',''),
        data: JSON.stringify(flight),
        contentType: "application/json",
        success: function(receive) {
            $("#adminTable").empty();
            $("#informationP").replaceWith(receive);
            $("#hiddenLi").removeAttr('style');
        },
        error: function() {
            alert('Error edited flight');
        }
    });
}

   @RequestMapping(value = prefix + "/flights/{id}", method = RequestMethod.PUT, consumes = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public String updateFlight(@PathVariable("id") String id, @RequestBody FlightDto flightDto) {
        String returnText = "Flight edited successful";
        String str1 = flightDto.getNavigation();
        String str2 = id;
        return returnText;
    }

org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json' not supported

放置请求：

 public class FlightDto implements Serializable {
    private int id;
    private String navigation;

    public FlightDto() {
        super();
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getNavigation() {
        return navigation;
    }

    public void setNavigation(String navigation) {
        this.navigation = navigation;
    }

}

  function editNavigation() {
    var flight={
        id:idAction.replace('edit',''),
        navigation:newNavigation
    };
    console.log(flight);
    var prefix = '/airline/';
    $.ajax({
        type: 'PUT',
        url: prefix +'flights/' + idAction.replace('edit',''),
        data: JSON.stringify(flight),
        contentType: "application/json",
        success: function(receive) {
            $("#adminTable").empty();
            $("#informationP").replaceWith(receive);
            $("#hiddenLi").removeAttr('style');
        },
        error: function() {
            alert('Error edited flight');
        }
    });
}

   @RequestMapping(value = prefix + "/flights/{id}", method = RequestMethod.PUT, consumes = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public String updateFlight(@PathVariable("id") String id, @RequestBody FlightDto flightDto) {
        String returnText = "Flight edited successful";
        String str1 = flightDto.getNavigation();
        String str2 = id;
        return returnText;
    }

org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json' not supported

控制台日志（航班）；-对象{id:“7”，导航：“sdfdsfsd”}

飞行控制器：

 public class FlightDto implements Serializable {
    private int id;
    private String navigation;

    public FlightDto() {
        super();
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getNavigation() {
        return navigation;
    }

    public void setNavigation(String navigation) {
        this.navigation = navigation;
    }

}

  function editNavigation() {
    var flight={
        id:idAction.replace('edit',''),
        navigation:newNavigation
    };
    console.log(flight);
    var prefix = '/airline/';
    $.ajax({
        type: 'PUT',
        url: prefix +'flights/' + idAction.replace('edit',''),
        data: JSON.stringify(flight),
        contentType: "application/json",
        success: function(receive) {
            $("#adminTable").empty();
            $("#informationP").replaceWith(receive);
            $("#hiddenLi").removeAttr('style');
        },
        error: function() {
            alert('Error edited flight');
        }
    });
}

   @RequestMapping(value = prefix + "/flights/{id}", method = RequestMethod.PUT, consumes = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public String updateFlight(@PathVariable("id") String id, @RequestBody FlightDto flightDto) {
        String returnText = "Flight edited successful";
        String str1 = flightDto.getNavigation();
        String str2 = id;
        return returnText;
    }

org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json' not supported

错误：

 public class FlightDto implements Serializable {
    private int id;
    private String navigation;

    public FlightDto() {
        super();
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getNavigation() {
        return navigation;
    }

    public void setNavigation(String navigation) {
        this.navigation = navigation;
    }

}

  function editNavigation() {
    var flight={
        id:idAction.replace('edit',''),
        navigation:newNavigation
    };
    console.log(flight);
    var prefix = '/airline/';
    $.ajax({
        type: 'PUT',
        url: prefix +'flights/' + idAction.replace('edit',''),
        data: JSON.stringify(flight),
        contentType: "application/json",
        success: function(receive) {
            $("#adminTable").empty();
            $("#informationP").replaceWith(receive);
            $("#hiddenLi").removeAttr('style');
        },
        error: function() {
            alert('Error edited flight');
        }
    });
}

   @RequestMapping(value = prefix + "/flights/{id}", method = RequestMethod.PUT, consumes = MediaType.APPLICATION_JSON_VALUE)
    @ResponseBody
    public String updateFlight(@PathVariable("id") String id, @RequestBody FlightDto flightDto) {
        String returnText = "Flight edited successful";
        String str1 = flightDto.getNavigation();
        String str2 = id;
        return returnText;
    }

org.springframework.web.HttpMediaTypeNotSupportedException: Content type 'application/json' not supported

---

如何修复此错误？

您需要在标题中定义内容类型，而不是使用headers属性在负载中定义内容类型

   data: JSON.stringify(flight),
   headers:{contentType: "application/json"}

---

您需要在头中定义内容类型，而不是使用headers属性在负载中定义内容类型

   data: JSON.stringify(flight),
   headers:{contentType: "application/json"}

---

您应该在ajax中添加

数据类型：“json”

。或者添加头，如

头：{'Accept'：'application/json'，'Content Type'：'application/json'}

您应该在ajax中添加

数据类型：“json”

。或者添加标题，如

headers:{'Accept'：'application/json'，'Content Type'：'application/json'}

changed:headers:{contentType:'application/json'}。为什么我只有警报（“错误编辑航班”）；现在？更改：标题：{contentType:“application/json”}。为什么我只有警报（“错误编辑航班”）；现在？