Question

在我的代码中，我正在阅读一个名为$('table[id^="grid-"]').on("click", "td > input", function (e) { var grid = "#" + $(e.target).closest("table").attr("id"); var caption = $(grid).jqGrid("getGridParam", "caption"); var checked = $(e.target).is(":checked") var rowId = $(e.target).closest("tr").attr("id") rowData = $(grid).getRowData(rowId); });的文本文件（我下载的这个文件，它放在我正在处理的项目的文件夹中），其中包含每天要读取的25个温度值。我的程序读取这些值并将它们保存到数组中。完成计算max，min和avg后，它会将这些值以及每小时温度表写入我将调用input-temps.txt的输出文件。

我的代码问题在于，当它运行时无法找到该文件。我已尝试过其他循环，但结果相同。我出了什么问题？

谢谢。

output-temps.txt

Answer 1

要检查文件是否存在，您必须使用“access（）”功能。首先包括如下：

        String before = "2";
        String after = "11";

        final StateManager stateManager = new StateManager(problem);
        stateManager.addStateUpdater(new JobsInRouteMemorizer(stateManager));



        ConstraintManager constraintManager = new ConstraintManager(problem, stateManager);
        constraintManager.addConstraint(new OneJobBeforeAnother(stateManager, before, after));

        final RewardAndPenaltiesThroughSoftConstraints contrib = new RewardAndPenaltiesThroughSoftConstraints(problem, before, after);
        SolutionCostCalculator costCalculator = new SolutionCostCalculator() {

            @Override
            public double getCosts(VehicleRoutingProblemSolution solution) {
                double costs = 0.;
                List<VehicleRoute> routes = (List<VehicleRoute>) solution.getRoutes();
                for(VehicleRoute route : routes){
                    costs+=route.getVehicle().getType().getVehicleCostParams().fix;
                    costs+=stateManager.getRouteState(route, InternalStates.COSTS, Double.class);
                    costs+=contrib.getCosts(route);
                }
                return costs;
            }

        };
        VehicleRoutingAlgorithmBuilder vraBuilder = new VehicleRoutingAlgorithmBuilder(problem,
                "algorithmConfig.xml");
        vraBuilder.addCoreConstraints();
        vraBuilder.setStateAndConstraintManager(stateManager, constraintManager);
        vraBuilder.addDefaultCostCalculators();
        vraBuilder.setObjectiveFunction(costCalculator);
        algorithm = vraBuilder.build();



public class JobsInRouteMemorizer implements StateUpdater, ActivityVisitor {
private StateManager stateManager;
private VehicleRoute route;



public JobsInRouteMemorizer(StateManager stateManager) {
    super();
    this.stateManager = stateManager;
}

@Override
public void begin(VehicleRoute route) {
    this.route=route;
}

@Override
public void visit(TourActivity activity) {
    if(activity instanceof JobActivity){
        String jobId = ((JobActivity) activity).getJob().getId();
        StateId stateId = stateManager.createStateId(jobId);
        System.out.println(stateId.getIndex());
        System.out.println(stateId.toString());
        stateManager.putProblemState(stateId, VehicleRoute.class, this.route);
    }

}

@Override
public void finish() {}

}

写入文件错误

1 个答案: