将js对象与json对象的转换

 /*
  /*功能：返回表tabView的所有数据，以xml的格式返回
  */ 
        function returnTableJson() {
            var sTable = document.getElementById("tabView");
            var arr = [];
            var obj = {};
            for (var i = 1; i < sTable.rows.length; i++) {

                obj.index = sTable.rows[i].cells[0].innerHTML;
                obj.name = sTable.rows[i].cells[1].innerHTML;
                obj.email = sTable.rows[i].cells[2].innerHTML;
                obj.info = sTable.rows[i].cells[3].innerHTML;
                arr.push(obj);
                obj = {};
                        
            }

           //这里将js对象转为json对象
            var strJson = JSON.stringify(arr);
            var obj2 = eval(strJson);
            var xml = "";
            for (var j = 0; j < obj2.length; j++) {
                xml += "<user>" + "<name>" + obj2[j].name + "</name>" + "<email>" + obj2[j].email + "</email>" + "<info>" + obj2[j].info + "</info></user>"
            }
            return encodeURIComponent(xml);      
        }

 

注：对json对象的遍历使用的循环是：

                 var json = eval(data);
                   var tab = document.getElementById('tabView');                  
                    for( i in json ){
                        var insertRow = tab.insertRow();
                        insertRow.className = "idInsertRow";
                        index = insertRow.rowIndex;
                       insertRow.onclick = onSelectRow;
                       var nCellNo = insertRow.insertCell(0);
                        var sCellName = insertRow.insertCell(1);
                        var sCellEmail = insertRow.insertCell(2);
                        var sCellInfo = insertRow.insertCell(3);
                        nCellNo.innerHTML = insertRow.rowIndex;
                        sCellName.innerHTML = json[i].name;
                        sCellEmail.innerHTML = json[i].email;
                        sCellInfo.innerHTML = json[i].info;
                    }

 //将json对象转换为js对象

var jsontext = 
'{"firstname":"Jesper","surname":"Aaberg","phone":["555-0100","555-0120"]}';
var contact = JSON.parse(jsontext);