Spring REST将布尔实体返回到AngularJS...以字符数组的形式出现

Question

@RequestMapping(value = RESTConstants.SLASH + "{id}" + RESTConstants.SLASH + RESTConstants.DEPENDENCIES, method = RequestMethod.GET)
@ResponseBody
public ResponseEntity<Boolean> hasDependencies(@PathVariable Long id, UriComponentsBuilder builder) {
    HttpHeaders responseHeaders = new HttpHeaders();
    Technology technology = technologyService.findById(id);
    if (technology == null) {
        return new ResponseEntity<Boolean>(responseHeaders, HttpStatus.NOT_FOUND);
    } else {
        Boolean hasDependencies = technologyService.hasDependencies(id);
        responseHeaders.setLocation(builder.path(RESTConstants.SLASH + RESTConstants.TECHNOLOGIES + RESTConstants.SLASH + "{id}" + RESTConstants.DEPENDENCIES).buildAndExpand(technology.getId()).toUri());
        return new ResponseEntity<Boolean>(hasDependencies, responseHeaders, HttpStatus.OK);
    }
}

@RequestMapping(value = RESTConstants.SLASH + "{id}" + RESTConstants.SLASH + RESTConstants.DEPENDENCIES, method = RequestMethod.GET)
@ResponseBody
public boolean hasDependencies(@PathVariable Long id, UriComponentsBuilder builder) {
    Technology technology = technologyService.findById(id);
    if (technology == null) {
        return false;
    } else {
        return technologyService.hasDependencies(id);
    }
}

下面是AngularJS代码：

'use strict';
utilsModule.factory('RESTService',
  ['$resource', 'ENV', 'FileUploader', 'AuthService',
  function($resource, ENV, FileUploader, AuthService) {
    return {
      Technology: $resource(ENV.NITRO_PROJECT_REST_URL + '/technologies/:technologyId', {}, {
        hasDependencies: {
          url: ENV.NITRO_PROJECT_REST_URL + '/technologies/:technologyId/dependencies',
          method: 'GET',
          params: { technologyId: 'technologyId' }
        }
      })
    }
  }
]);

'use strict';
technologyModule.factory('TechnologyService',
  ['RESTService',
  function(RESTService) {
    var factory = {};
    factory.hasDependencies = function(technologyId, callback) {
      return RESTService.Technology.hasDependencies({technologyId: technologyId}).$promise.then(callback);
    }
    return factory;
  }
]);

'use strict';
technologyModule.controller('technology.deleteCtrl',
  ['$scope', '$state', '$stateParams', 'TechnologyService',
  function($scope, $state, $stateParams, TechnologyService) {
    $scope.hasDependencies = true;
    TechnologyService.hasDependencies($stateParams.technologyId, function(hasDependencies) {
      console.log("hasDependencies", hasDependencies);
      $scope.hasDependencies = hasDependencies;
    });
  }
]);

在Chromium浏览器调试窗格中，network Headers选项卡显示：远程地址:127.0.0.1:8443请求URL:xxxx:8443/Project-REST/Technologies/4/Dependencies请求方法：GET状态代码：200 OK响应Headersview source Access-Control-Allow-Headers：Accept-Language,Content-Type,X-Requested-With,accept、Origin、Access-Control-Request-Methods,Accept-Origine、Access-Control-Request-Methods,JSON；Charset=UTF-8日期：Sun,2014年10月19日07:47:59 GMT过期：0 pragma：no-cache server：apache-coyote/1.1 strict-transport-security:max-age=31536000；includeSubDomains传输-编码：分块x-content-type-options：nosniff x-frame-options：deny x-xss-protection：1；mode=块

网络响应选项卡显示：false

Answer 1

我求助于一个包装类：

public class ValueResource {

    private Object value;

    public ValueResource(Object value) {
        this.value = value;
    }

    public Object getValue() {
        return value;
    }

    public void setValue(Object value) {
        this.value = value;
    }

}

现在我可以返回一个响应实体：

return new ResponseEntity<ValueResource>(new ValueResource(hasDependencies), responseHeaders, HttpStatus.OK);

它给出了一个布尔值：

TechnologyService.hasDependencies($stateParams.technologyId, function(data) {
  console.log("hasDependencies", data.value);
});