/**
         *  创建简单的xml
         */
        def createXml() {
            def sw = new StringWriter()
            MarkupBuilder mk = new MarkupBuilder(sw)
            mk.users {
                user {
                    name("张三")
                    age(20)
                    sex("男")
                    addr("山东")
                }
                user {
                    name("小丽")
                    age(18)
                    sex("女")
                    addr("北京")
                }
                user {
                    name("小王")
                    age(22)
                    sex("男")
                    addr("贵州")
                }
            }
            println sw
            render "简单的xml"

        }

    <users>
      <user>
        <name>张三</name>
        <age>20</age>
        <sex>男</sex>
        <addr>山东</addr>
      </user>
      <user>
        <name>小丽</name>
        <age>18</age>
        <sex>女</sex>
        <addr>北京</addr>
      </user>
      <user>
        <name>小王</name>
        <age>22</age>
        <sex>男</sex>
        <addr>贵州</addr>
      </user>
    </users> 

   /**
     * 创建复杂的xml
     * @return
     */
    def complexXml() {
        def builder=new groovy.xml.StreamingMarkupBuilder()
        builder.encoding='utf-8' //设置编码
        def person = {
            mkp.xmlDeclaration() //<?xml version='1.0'?>
            mkp.declareNamespace("info":"userInfo") //添加命名空间
            mkp.declareNamespace("location":"http://www.baidu.com")
            persons {
                comment << "用户信息"  //添加注释
                info.person(id:3){
                    name("张三")
                    age(22)
                    sex("男")
                    location.addr('重庆')
                }
                info.person(id:1){
                    name("李四")
                    age(20)
                    sex("男")
                    location.addr('北京')
                }
                info.person(id:2){
                    name("小丽")
                    age(19)
                    sex("女")
                    location.addr('天津')
                }
            }

        }
        def writer = new StringWriter()
        writer << builder.bind(person)
        def file = new File("d:\\user.xml")
        def pw = new PrintWriter(file)
        pw.print(writer)
        pw.flush()
        pw.close()
        println writer
        render "复杂"
    }

def readXml() {
        params.remove("controller")
        params.remove("format")
        params.remove("action")
        def xml = new XmlSlurper()
        def result = xml.parse(new File("d:\\usr.xml"))
        result.user.each {k->
            params.name = k.name.toString()
            params.age  = k.age
            params.sex  = k.sex.toString()
            params.addr = k.addr.toString()
            User user = new User(params)
            user.save(flush:true)
            //打印错误
            //println user.errors
        }
        render "解析成功"
    }

码云地址：http://git.oschina.net/lj18883588608/grails_xml