JsonParseException：意外的字符

Question

我试图将一个实体和两个字符串值一起从 html 页面传递到服务器，但出现此错误。

controller.js:

'use strict';

myApp.controller('fooController',
function($scope,fooCollection) {
    $scope.fooEntity = {

    };
    $scope.createfooGroup = function() {
        fooCollection.createfooGroup($scope.fooEntity ,
            $scope.string1, $scope.string2
        )
    };
});

service.js:

myApp.factory('fooCollection', function($resource) {
return $resource('../api/group', {}, {
    createfooGroup : {method: 'POST'}
})
});

而整个错误信息是：

Failed executing POST /group
org.jboss.resteasy.spi.ReaderException: org.codehaus.jackson.JsonParseException: Unexpected character ('a' (code 97)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: HttpInputOverHTTP@4845afdc; line: 1, column: 2]
at org.jboss.resteasy.core.MessageBodyParameterInjector.inject(MessageBodyParameterInjector.java:183)
at org.jboss.resteasy.core.MethodInjectorImpl.injectArguments(MethodInjectorImpl.java:89)
at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:112)
at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:296)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:250)
at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:237)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356)
at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179)
at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:499)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
at org.eclipse.jetty.io.AbstractConnection.run(AbstractConnection.java:540)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
at org.eclipse.jetty.util.thread.QueuedThreadPool.run(QueuedThreadPool.java:555)
at java.lang.Thread.run(Thread.java:745)

我在网页上添加了 ng-model 属性。有人可以帮我解决这个问题吗？？非常感谢！

Answer 1

当您调用 $resource 实例的方法时，即使是自定义实例，它也接受严格的参数列表。这是引自 docs:

The action methods on the class object or instance object can be invoked with the following parameters:

HTTP GET "class" actions: Resource.action([parameters], [success], [error])

non-GET "class" actions: Resource.action([parameters], postData, [success], [error])

non-GET instance actions: instance.$action([parameters], [success], [error])

您的自定义方法 createfooGroup 明确定义为 POST 方法，因此应用第二个选项（非 GET "class" 操作). Action 期望第一个参数 [parameters] 是可选的查询字符串参数列表，第二个 postData - POST 方法所必需的，第三个 [success] - 回调成功，这也是可选的。

所以，当你打电话时

fooCollection.createfooGroup($scope.fooEntity, $scope.string1, $scope.string2);

你把$scope.fooEntity作为[parameters]，$scope.string1作为postData，$scope.string2作为[success]，这显然会导致一些意想不到的结果行为。在这种情况下，您的服务器将 $scope.string2 的值作为 POST 数据接收，我假设它只是一些字符串而不是有效的 JSON，因此服务器无法解析它。如果您想将所有值传递给服务器，请将它们放入数组中，这样操作会将其解释为 postData:

fooCollection.createfooGroup([$scope.fooEntity, $scope.string1, $scope.string2]);

JsonParseException：意外的字符

JsonParseException: Unexpected character

javascript

controllers

angularjs