javascript - 从 JSON 对象/字符串或 Java 脚本变量中删除开始和结束处的双引号？

Question

我从 servlet 获取对象的 JSON 数组，并尝试在 java 脚本中填充表控件。

这是我的代码，出于某种原因，它在开头和结尾处放置了双引号，表格控件不接受用于填充值的双引号。如何删除开头和结尾的双引号。

 aData = [{"A":"one","B":"Two","C":"Three","D":"8","E":"No","F":"Business","G":"0",
 "L1H":"Analytics"},{"A":"ones","B":"Twos","C":"Threes","D":"85","E":"Nos",
 "F":"BusinessD","G":"0","L1H":"AnalyticsM"}]

 var oModel = new sap.ui.model.json.JSONModel();
 oModel.setData({modelData: aData});
 var oTable=sap.ui.getCore().byId("id1");
 oTable.setModel(oModel);
 oTable.bindRows("/modelData"); // This static code of aData is working fine in
                                // my Table   control of HTMl page.

 //Here, i Wanted to get values dynamically from servlet and populate it in Table.
  var global;
  $.get('someServlet', function(data) { 
 var abc, xyz;
for(var i=0;i<(data.length);i++){
 abc='{'+'\"A\":'+'\"'+data[i].A+'\"'+','+'\"B":'+'\"'+data[i].B+'\"'+',
 '+'\"C\":'+'\"'+data[i].C+'\"'+','+'\"D\":'+'\"'+data[i].D+'\"'+',
 '+'\"E\":'+'\"'+data[i].E+'\"'+','+'\"F\":'+'\"'+data[i].F+'\"'+',
 '+'\"G\":'+'\"'+data[i].G+'\"'+','+'\"H\":'+'\"'+data[i].H+'\"}';   
        if (xyz===undefined)
            xyz=abc;
        else                
        xyz=abc+','+xyz;
            global = xyz;
        }
        global="["+global+"]";
        var oModel = new sap.ui.model.json.JSONModel();
        oModel.setData({modelData: global});
        var oTable=sap.ui.getCore().byId("id1");
        oTable.setModel(oModel);
        oTable.bindRows("/modelData");

    });
     //global="[{"A":"one","B":"Two","C":"Three"}...]"
     //alert(global);  Displaying without double quotes as expected.
     //when I see the value in Chrome debugger double quotes are appearing at begin&End

所以最后我在全局变量 is 中有值，用双引号引起来。

//global="[{"A":"one","B":"Two","C":"Three","D":"8","E":"No","F":"Business","G":"0","L1H":"Analytics"},

{"A":"ones","B":"Twos","C":"Threes","D":"85","E":"Nos","F":"BusinessD ","G":"0","L1H":"AnalyticsM"}]"

如何去掉这个 resultSet JSONArray 对象开头和结尾的双引号？如果我放置警报，它会在没有双引号的情况下显示。当我在 Chrome 调试器中看到这个全局变量时，它显示为双引号并且无法在表控件中填充值。我在将值填充到表控件时遇到了一些困难，这些值来自 JSON 格式/字符串/数组的 Servlet。请帮忙。

感谢任何输入和帮助。

Answer 1

您可以调用 JSON.parse在最后将您的字符串解析为一个对象，即:

global=JSON.parse("["+global+"]");

但是与其动态地构建一个 JSON 字符串然后解析它，不如设置 var global = []; 并在您的 for 循环中执行以下操作可能更简单:

global.push({ 
    Deals: data[i].Deals, 
    L1H: data[i].L1H, 
    L2H: data[i].L2H 
});

您尝试过以下方法吗？

$.get('someServlet', function(data) { 
    var oModel = new sap.ui.model.json.JSONModel();
    oModel.setData({modelData: data});
    var oTable=sap.ui.getCore().byId("id1");
    oTable.setModel(oModel);
    oTable.bindRows("/modelData");
});