springmvc@RequestBody给出了415个错误

Question

无论我尝试什么，发送给dispatcher servlet的请求都会返回HTTP 415错误。请求中将内容类型设置为application/json。

消息转换器似乎没有将请求映射到对象。

我的POM中有所有Jackson依赖项：

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>${jackson-databind-version}</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.module</groupId>
        <artifactId>jackson-module-jaxb-annotations</artifactId>
        <version>2.4.1</version>
    </dependency>
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>1.9.13</version>
    </dependency>
    <dependency>
        <groupId>com.sun.xml.bind</groupId>
        <artifactId>jaxb-impl</artifactId>
        <version>2.2.7</version>
    </dependency>
    <dependency>
        <groupId>org.apache.xbean</groupId>
        <artifactId>xbean-spring</artifactId>
        <version>3.7</version>
    </dependency>

控制器类：

@RequestMapping(value = "/login", method = RequestMethod.POST, headers = {"Accept=application/json"}, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseBody
public DriverLoginResponseDTO login(@RequestBody MyDTO dto)
{
    System.out.println("login method hit!");
    LoginResponseDTO resp = null;

    try {
        resp = loginService.processLogin(dto);
    }
    catch (Exception cde) {
        resp = new LoginResponseDTO();
        resp.setMessage("ERROR");
    }

    // Return response object
    return resp;
} // login

我试图在@刚需映射中添加接受、消费、生产，但没有成功。

我可以使用HttpServletRequest作为方法参数获得正确的JSON响应：

@RequestMapping(value = "/login3", method = RequestMethod.POST)
@ResponseBody
public DriverLoginResponseDTO login3(HttpServletRequest request)
{
    String line;
    StringBuilder sb = new StringBuilder();

    InputStream is;
    try {
        is = request.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
        while ((line = reader.readLine()) != null) {
            sb.append(line).append("\n");
        }
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    System.out.println("login3 method hit!");
    System.out.println("JSON string received: " + sb.toString());

    LoginResponseDTO resp = null;

    try {
        resp = loginService.processLogin(new MyDTO());
    }
    catch (Exception cde) {
        resp = new LoginResponseDTO();
        resp.setMessage("ERROR");
    }

    // Return response object
    return resp;
} // login

这一个在写入系统时显示正确的JSON字符串。出来在上面的第一个“login”方法中，有些东西没有将JSON请求映射到RequestBody对象，但我看不出缺少什么。

我不知道这是否相关，但Websphere也抛出了以下错误：

SRVE8094W:警告：无法设置标题。答复已经提交。

Answer 1

在@RequestMapping