JS中 怎么将json对象转化成字符串

Posted 2023-05-01

我现在有个 json =[id:1 ,id:2] 怎么转成字符串 “[id:1 ,id:2] ”

Obj2str: function(o)
if (o == undefined)
return "";

var r = [];
if (typeof o == "string") return "\"" + o.replace(/([\"\\])/g, "\\$1").replace(/(\n)/g, "\\n").replace(/(\r)/g, "\\r").replace(/(\t)/g, "\\t") + "\"";
if (typeof o == "object")
if (!o.sort)
for (var i in o)
r.push("\"" + i + "\":" + fn.Obj2str(o[i]));
if (!!document.all && !/^\n?function\s*toString\(\)\s*\\n?\s*\[native code\]\n?\s*\\n?\s*$/.test(o.toString))
r.push("toString:" + o.toString.toString());

r = "" + r.join() + ""
else
for (var i = 0; i < o.length; i++)
r.push(fn.Obj2str(o[i]))
r = "[" + r.join() + "]";

return r;

return o.toString().replace(/\"\:/g, '":""');
参考技术A ie8以前的浏览器要自己写代码手工转。
text="["+
"id:“+json[0]+""
"id:“+json[1]+""+
"]";
类似以上写成循环即可。
或者用json-js这样的库

ie>8以后和ff>3.5以都可以用浏览器预置对象
JSON.stringify方法直接转换 参考技术B 去网上找找Json2.js,比较好用。 参考技术C json.toString();追问

错，打错特错

怎么把对象数组转换为集合

Student s1=new Student("张三","20");
Student s2=new Student("李四","21");
Student s3=new Student("王五","22");
Student s4=new Student("赵六","23");
Student s5=new Student("马奇","24");

Student [] demo=s1,s2,s3,s4,s5;
List al=new ArrayList();
al=(ArrayList) Arrays.asList(demo);
request.setAttribute("al", al);

这样转报错了 java.lang.ClassCastException: java.util.Arrays$ArrayList cannot be cast to java.util.ArrayList

参考技术A Student s1=new Student("张三","20");
Student s2=new Student("李四","21");
Student s3=new Student("王五","22");
Student s4=new Student("赵六","23");
Student s5=new Student("马奇","24");

Student [] demo=s1,s2,s3,s4,s5;
List<Student> al=new ArrayList<Demo>();
for(int i=0;i<demo.length;i++)
list.add(demo[i]);

本回答被提问者和网友采纳 参考技术B 我估计
al=(ArrayList) Arrays.asList(demo);

（ArrayList)改成（list）试试