js通过正则表达式解析xml 获取指定的内容

存在这样的xml:

<?xml version="1.0" encoding="UTF-8"?>
<interface xmlns="" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" schemaLocation="http://www.chinatax.gov.cn/tirip/dataspec/interfaces.xsd" version="DZFP1.0">
<globalInfo>
<appId>ZZSDZFP</appId>
<interfaceCode>EI.DYCOMCS.U.EC.INTRA</interfaceCode>
<userName>410102999999251</userName>
<passWord>123456</passWord>
<requestCode></requestCode>
<requestTime>2019-11-08 10:30:36</requestTime>
<responseCode></responseCode>
<dataExchangeId>111ADBHB20191010100003651</dataExchangeId>
<fjh>0-2</fjh>
<jqbh></jqbh>
</globalInfo>
<returnStateInfo>
<returnCode>0011</returnCode><returnMessage>6Kej5p6Q6L6T5YWl5oql5paH5pWw5o2u5Y+R55Sf5byC5bi477yM6K+35pu05q2j5ZCO6YeN5paw5Lyg5YWl</returnMessage>
</returnStateInfo>
<Data>
<dataDescription>
<zipCode>0</zipCode>
<encryptCode>0</encryptCode>
<codeType>0</codeType>
</dataDescription><content>PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz48UkVTUE9OU0VfQ09NTU9OX0RZQ09NQ1MgY2xhc3M9IlJFU1BPTlNFX0NPTU1PTl8gRFlDT01DUyI+PERZWFhTIC8+PC9SRVNQT05TRV9DT01NT05fRFlDT01D<</content>

现在我要获取里面的returnCode 和returnMessage里面的内容

var xmlstr=<?xml version="1.0" encoding="UTF-8"?><interface xmlns="" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" schemaLocation="http://www.chinatax.gov.cn/tirip/dataspec/interfaces.xsd" version="DZFP1.0"><globalInfo><appId>ZZSDZFP</appId><interfaceCode>EI.DYCOMCS.U.EC.INTRA</interfaceCode><userName>410102999999251</userName><passWord>123456</passWord><requestCode></requestCode><requestTime>2019-11-08 10:30:36</requestTime><responseCode></responseCode><dataExchangeId>111ADBHB20191010100003651</dataExchangeId><fjh>0-2</fjh><jqbh></jqbh></globalInfo><returnStateInfo><returnCode>0011</returnCode><returnMessage>6Kej5p6Q6L6T5YWl5oql5paH5pWw5o2u5Y+R55Sf5byC5bi477yM6K+35pu05q2j5ZCO6YeN5paw5Lyg5YWl</returnMessage></returnStateInfo><Data><dataDescription><zipCode>0</zipCode><encryptCode>0</encryptCode><codeType>0</codeType></dataDescription><content>PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz48UkVTUE9OU0VfQ09NTU9OX0RZQ09NQ1MgY2xhc3M9IlJFU1BPTlNFX0NPTU1PTl8gRFlDT01DUyI+PERZWFhTIC8+PC9SRVNQT05TRV9DT01NT05fRFlDT01D";


    var pattern=/<returnCode>(.*)</returnCode>/i


    var code=pattern.exec(xmlstr);

    console.log(code[1]);


    var pattern1=/<returnMessage>(.*)</returnMessage>/i

    var msg=pattern1.exec(xmlstr);

     console.log(msg[1]);

最后打印出来的结果如下：

希望对你有所帮助