var wlCompany = $("#wlCompany").val();//這里含有中文

    var wlId = $("#wlId").val();

    var proposer = $("#proposer").val();

    if(confirm("確認要換貨嗎")){

$.ajax({

type:'POST',

url:'${pageContext.request.contextPath}/returnGoods/confrimExchangeGoods.do',

data:'wlCompany='+wlCompany+'&wlId='+wlId+'&proposer='+proposer, //直接傳值

dataType:'text',

error:function(){

    alert("JQuery AJAX Error!");     

},

success:function(msg){

    alert(msg);

    return;

    if(msg=='換貨成功'){

 document.location="${pageContext.request.contextPath}/orderItem/queryProduceItem.do?orderBusType="+${orderBusType};

    }

}

});

     }

 }

ActionForm form, HttpServletRequest request,

HttpServletResponse response) throws Exception {

log.info("確認換貨 confrimExchangeGoods start...............");

response.setCharacterEncoding("UTF-8"); //這里要設置一下

String wlCompany = request.getParameter("wlCompany");

String wlId = request.getParameter("wlId");

String proposer = request.getParameter("proposer");
     .....
}