用javascript从表单中生成xml
本文以一个简单的登录界面演示，有三个文件，login.html, XMLWriter.js, login.js。login.html
<html><head><scriptsrc = "XMLWriter.js" ></script><scriptsrc = "login.js" ></script></head><body><form>用户名：<input id = "uname" type = "text"></input><br/>密 码：<input id = "pword" type = "password"></input><br/><button id = "aa">submit</button></form><br/></body></html>
XMLWriter.js
function XMLWriter(){ this.XML=['<?xml version="1.0" encoding="UTF-8"?>']; this.Nodes=[]; this.State=""; this.FormatXML = function(Str) { if (Str) return Str.replace(/&/g, "&amp;").replace(/\"/g, "&quot;").replace(/</g, "&lt;").replace(/>/g, "&gt;"); return "" } this.BeginNode = function(Name) { if (!Name) return; if (this.State=="beg") this.XML.push(">"); this.State="beg"; this.Nodes.push(Name); this.XML.push("<"+Name); } this.EndNode = function() { if (this.State=="beg") { this.XML.push("/>"); this.Nodes.pop(); } else if (this.Nodes.length>0) this.XML.push("</"+this.Nodes.pop()+">"); this.State=""; } this.Attrib = function(Name, Value) { if (this.State!="beg" || !Name) return; this.XML.push(" "+Name+"=\""+this.FormatXML(Value)+"\""); } this.WriteString = function(Value) { if (this.State=="beg") this.XML.push(">"); this.XML.push(this.FormatXML(Value)); this.State=""; } this.Node = function(Name, Value) { if (!Name) return; if (this.State=="beg") this.XML.push(">"); this.XML.push((Value=="" || !Value)?"<"+Name+"/>":"<"+Name+">"+this.FormatXML(Value)+"</"+Name+">"); this.State=""; } this.Close = function() { while (this.Nodes.length>0) this.EndNode(); this.State="closed"; } this.ToString = function(){return this.XML.join("");}}
login.js
function createXML(){try{XML=new XMLWriter();XML.BeginNode("Login");XML.Node("Name", document.getElementById("uname").value);XML.BeginNode("password"); XML.WriteString(document.getElementById("pword").value);XML.EndNode();XML.Close(); // Takes care of unended tags.// The replace in the following line are only for making the XML look prettier in the textarea. alert(XML.ToString().replace(/</g,"\n<"););}catch(Err){alert("Error: " + Err.description);}}window.onload=function(){document.getElementById("aa").onclick=createXML;}
XMLWriter 有以下几个方法:
[*]BeginNode (Name)
[*]EndNode ()
[*]Attrib (Name, Value)
[*]WriteString (Value)
[*]Node (Name, Value)
[*]Close ()
[*]ToString ()
BeginNode 输出一个标签：
XML.BeginNode(“Foo”);
XML.BeginNode(“Foo”);
XML.Attrib(“Bar”, “Some Value”);
WriteString 方法：
XML.Node(“MyNode”, “My Value”);
//Produces: <MyNode>My Value</MyNode>
XML.BeginNode(“Foo”);
XML.WriteString(“Hello World”);
XML.EndNode();
//Produces <Foo>Hello World</Foo>
Node 方法：
XML.EndNode();
//Produces: <Foo Bar=”Some Value” />
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