完成json的解析

iazrael · Mar 31, 2013 · 978672c · 978672c
1 parent 31bc747
commit 978672c
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Showing 2 changed files with 104 additions and 1 deletion.
diff --git a/jsonparser.js b/jsonparser.js
@@ -9,7 +9,79 @@
     }
 
     JSONParser.prototype.parse = function(jsonText) {
-        // body...
+        // throw new Error('not complete');
+        var preter = this._interpreter;
+        preter.prepare(jsonText);
+        var result = {};
+        var token = preter.eatUntil('{');//找到第一个 ｛ ，作为json的开始
+        if(token === null){
+            throw new Error('not json');
+        }
+        preter.eat();
+        handleProperties(result, preter);
+        return result;
     };
 
+    function handleProperties(obj, preter){
+        var token, str, prop, value, tmpObj;
+        while((token = preter.eatUntil(['}', '"'])) !== null){
+            str = preter.eat();
+            if(str === '"'){//property start
+                prop = preter.eatUntil(str);
+                preter.eatUntil(':');
+                preter.eat();//吞掉：
+                token = preter.eatUntil([',', '{', '}', '[']);
+                str = preter.eat();//吞掉，或｝｛
+                if(str === ','){
+                    value = getValue(token);
+                    obj[prop] = value;
+                }else if(str === '}'){
+                    value = getValue(token);
+                    obj[prop] = value;
+                    return;//这个obj已经结束了
+                }else if(str === '{'){//嵌套的obj
+                    value = {};
+                    obj[prop] = value;
+                    handleProperties(value, preter);
+                }else if(str === '['){
+                    value = [];
+                    obj[prop] = value;
+                    while((token = preter.eatUntil(['{', ']'])) !== null){
+                        str = preter.eat();
+                        if(str === ']'){
+                            //数组结束了
+                            break;
+                        }else if(str === '{'){
+                            tmpObj = {};
+                            value.push(tmpObj);
+                            handleProperties(tmpObj, preter);
+                        }
+                    }
+                }
+            }else if(str === '}'){
+                //obj结束了
+                return;
+            }
+        }
+    }
+
+    function getValue(str){
+        //目前不支持Date类型
+        str = str.trim();
+        if(str === 'null'){
+            return null;
+        }else if(str.indexOf('"') === 0){
+            //string
+            return str.substring(1, str.length - 1);
+        }else if(str === 'true'){
+            return true;
+        }else if(str === 'false'){
+            return false;
+        }else {
+            return parseFloat(str);
+        }
+    }
+
+    this.JSONParser = JSONParser;
+
 });
diff --git a/test-json.html b/test-json.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <meta http-equiv="content-type" content="text/html; charset=utf-8" />
+    <title>Test</title>
+</head>
+<body>
+<textarea id="xmlText" style="width: 520px; height: 60px;">
+{"nodeType":9,"nodeName":"document","attributes":{},"childNodes":[{"nodeName":"xml","nodeType":10,"nodeValue":"version=\"1.0\""},{"nodeName":"DOCTYPE","nodeType":10,"nodeValue":"html"},{"nodeType":1,"nodeName":"head","attributes":{},"childNodes":[{"nodeType":1,"nodeName":"meta","attributes":{"http-equiv":"content-type","content":"text/html; charset=utf-8"},"childNodes":[],"tagName":"meta"},{"nodeType":1,"nodeName":"title","attributes":{},"childNodes":[{"nodeType":3,"nodeValue":"Test"}],"tagName":"title"}],"tagName":"head"},{"nodeType":8,"nodeValue":"  <meta http-equiv=\"content-type\" content=\"text/html; charset=utf-8\" />\n    <title>Test</title>"}]}
+</textarea> 
+
+<button id="action">do parse</button>
+<div id="result"></div>
+<script src="ztool.mini.js"></script>
+<script src="interpreter.js"></script>
+<script src="jsonparser.js"></script>
+<script>
+Z.$package(function(z){
+    var txt = document.getElementById('xmlText');
+    var btn = document.getElementById('action');
+    var parser = new z.parser.JSONParser();
+
+    btn.onclick = function(){
+        ret = parser.parse(txt.value);
+        console.log(ret);
+     }
+
+});
+</script>
+</body>
+</html>