【前台 乱码】 前台单独乱码+后台往前台传输的数据乱码

$.ajax({url:"productAdd.htmls",
                        type:"post",
                        data:{
                            "productName" : productName,
                            "productCre" : productCre
                        },
                        success:function(data){
                            if(data != null){
                                var product = eval("("+data+")");
                                temp="<tr class='text-c'><td><input type='checkbox' value='"+product.productId+
                                "'></td><td>"+product.productName+"</td><td><a href='checkdisease.htmls'>【查看疾病信息】</a><a href='updateproduct.htmls'>【更新】</a></td></tr>";
                                $('.table-bordered tbody tr:first' , parent.document).before(temp);
                                $('.table-bordered tbody tr:last' , parent.document).remove();
                            }    
                            // var index = parent.layer.getFrameIndex(window.name); 可以用这个获取当前要关闭的layer ,也可以使用parent.indexProductAdd 获取在父层定义的那个layer。open()的弹窗
                            parent.layer.close(parent.indexProductAdd); //获取到layer的弹出窗 关闭它  
                }});

@RequestMapping(value= "/statistics" ,produces = "text/html;charset=UTF-8")
    @ResponseBody 
    public String statistics(HttpServletRequest request,String condition,String  questOptions) throws UnsupportedEncodingException{
        questOptions = questOptions.replaceAll("category=", "");
        String [] questArr = questOptions.split("&");
        
        condition = URLDecoder.decode(condition, "utf-8");
        System.out.println(condition);
        System.out.println(questOptions);
        return null;
    }