方法一

function print_r(theObj) {

var retStr = '';

if (typeof theObj == 'object') {

retStr += '

}

return retStr;

}

方法二

$(document).ready(function(){

$('#btn').click(function(){

var jsonStr = $('#jsonData').val();

var json = eval('('+jsonStr+')');

(function(){

var print_r = function(o, depth) {

var result = '';

depth || (depth=1);

var indent = new Array(4*depth+1).join(' ');

var indentNext = new Array(4*(depth+1)+1).join(' ');

var indentNextTwo = new Array(4*(depth+2)+1).join(' ');

var tmp = '';

var type = typeof o;

switch(type) {

case 'string':

case 'number':

case 'boolean':

case 'undefined':

case 'function':

tmp += indent + indentNext + o + "\n";

break;

case 'object':

default:

for(var key in o) {

tmp += indentNextTwo + '[' + key + '] = ';

tmp += print_r(o[key], (depth+1));

}

}

result += type + "\n";

result += indentNext + '(' + "\n";

result += tmp;

result += indentNext + ')' + "\n";

return result;

};

alert(print_r(json));

}(json));

});

});

方法三

print_r:function(theObj) {

var retStr = '';

if (typeof theObj == 'object'||typeof theObj == 'array') {

retStr += '

}

$("body").append(retStr);

}