如何从控制器读取作为排序列表返回的JavaScript对象的值

Question

I get a sorted list from my controller to jsp page. I want to process this in javascript.

var foo = '${entityTypes}';

When I tried to loop this using a for in and read the values. but, it reads each and every character of the strings available. I tried json parse and stringify too, but still I get the same result.

var foo = '${entityTypes}';
alert(foo);

var str = JSON.stringify(foo);
var obj1 = JSON.parse(str); 
alert(obj1);    

for (var k in obj1) {
    if (obj1.hasOwnProperty(k)) {
        alert("Key is " + k + ", value is " + obj1[k]);
    }
}

Answer 1

As the Java-List is not automatically converted into JSON-format, the value of foo is entityList.toString() . What you have to do is, to convert the Java-List by yourself into JSON-format.
But it is much cheaper to convert the entityList in the controller. gson or jackson for example are some nice Java libraries which do Entity-to-JSON-conversion.

Answer 2

I managed to get this done. I found it is a string by the comment of VeXii. Thanks Vexxi. As it's a string I used substr to remove unwanted characters.

    str = foo.substr(0, foo.length-1);
obj = str.substr(1);

this removed first and the last character. That means the square bracket open and close.

Then I used split method to get the string I wanted. Still I had an issue as my string came with a colon as the last character. Again I removed the colon using spring methods available.

var arr = obj.split(',');

Thanks for your comments. That helped me to solve this.