小编Ale*_*lex的帖子

我有一个页面,使用LineChart与ChartRangeFilter控件显示数据.

<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
google.load('visualization', '1', {packages: ['controls', 'charteditor']});
google.setOnLoadCallback(drawChart);

function drawChart() {
    var data = new google.visualization.DataTable();
    data.addColumn('date', 'X');
    data.addColumn('number', 'Y1');
    data.addColumn('number', 'Y2');

    for (var i = 0; i < 12; i++) {
        data.addRow([new Date(2016, i,1), Math.floor(Math.random() * 200), Math.floor(Math.random() * 200)]);
    }

    var dash = new google.visualization.Dashboard(document.getElementById('dashboard'));

    var control = new google.visualization.ControlWrapper({
        controlType: 'ChartRangeFilter',
        containerId: 'control_div',
        options: {
            filterColumnIndex: 0,
            ui: {
                chartOptions: {
                    height: 50,
                    width: 600,
                    chartArea: {
                        width: '80%'
                    }
                }, …

在我的应用程序中,有多个线程试图插入到MySQL的 database.Is 的executeUpdate方法是线程安全的使用？我怎样才能使这项工作？

我对Hibernate很新.在这里我想比较两个选项.

第一种选择

我的hibernate pojo类如下.

Stock {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "stock_id")
  private Long stockId;

  @Column(name = "stock_name")
  private String stockName;

  @ManyToMany(fetch = FetchType.EAGER)
  @JoinTable(name = "stock_characteristics", joinColumns =  {@JoinColumn(name = "stock_id")}, inverseJoinColumns = {@JoinColumn(name = "ct_id")})
  private List<Characteristic> characteristics = new ArrayList<>();

  //constructor, getters and setters

}

Characteristics {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "ct_id", nullable = false)
  private Long id;

  @Column(name = "name", nullable = false, length = 32)
  private String name;

  //constructor, getters and setters …

我有一个JSP Web应用程序项目StudentApp,我在我的server.xml中配置如下

< Host name="test.com" appBase="D:/StudentApp" unpackWARs="true" autoDeploy="true" xmlValidation="false" xmlNamespaceAware="false"> Context path="" reloadable="true" crossContext="true" > /Context> /Host>

当我启动我的应用程序时它运行正常.我在D:/ StudentApp中保留了一些文件夹,如属性,ROOT,svn,我可以访问我网站上的所有文件夹.
例如,我可以像test.com/properties等一样访问..如果我正确地给出了这条路径.我想只限制ROOT文件夹..有没有人遇到过同样类型的问题？我该怎么做？