js eval 解析字符串

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//带变量的字符串<br>var str  = 'var a=1; var b=2;'; eval(str); alert(a+b);//结果 3；<br><br><br>//数组字符串<br>var arrStr = "[1,2,3,4]";eval(arrStr);<br><br>arrStr = [1,2,3,4];//转化结果<br><br>//json对象字符串<br>var jsonStr = "{name:'xiao',sex:'man'}";eval(jsonStr);<br><br>arrStr ={name:'xiao',sex:'man'};//转化结果<br><br>//json 对象转化为json 字符串<br><br>

  var student = new Object();

  student.name = "Lanny";

  student.age = "25";

  student.location = "China";

  var json = JSON.stringify(student);

  alert(student);