ajax的理解

    function fun_page(){
        var url="${root}/book/page";  获取一个地址
        var data={"index":index,"size":size,"step":step}; 以键值对封装分页的参数：第几页，显示的行数，起始页
        $.getJSON(url,data,function(result){ 到该地址（路由）去
            
            $(result.items).each(function(){
                var row=$(‘ <tr></tr>‘);
                row.append(‘<td>‘+this.bid+‘</td>‘);
                row.append(‘<td>‘+this.btitle+‘</td>‘);
                row.append(‘<td>‘+this.bauthor+‘</td>‘);
                row.append(‘<td>‘+this.bpublic+‘</td>‘);
                row.append(‘<td><button class="btn text-primary btnupd" lang="‘+this.bid+‘" data-toggle="modal" data-target="#myModal">修改</button>‘+
                        ‘<button class="btn text-primary btndel" lang="‘+this.bid+‘">删除</button></td>‘);
                row.appendTo($("#tblbook tbody"));
                
            });

@ResponseBody
    @RequestMapping(value="/book/page",method=RequestMethod.GET,
    produces={"application/json;charset=utf-8"})
    public String method1(@RequestParam(name="index",defaultValue="1")int index,  从封装的data里面获取
            @RequestParam(name="size",defaultValue="1")int size,
            @RequestParam(name="step",defaultValue="1")int step){
        String json=JSONObject.toJSONString(bookService.getBookList(index, size, step, "")); 去数据库里面查询，以json的形式返回
        return json;
    }

$(result.items).each(function(){                  //这个items是分页实体类里的一个当前页数据List 
                var row=$(‘ <tr></tr>‘);            //然后一个个的赋值到html桌面
                row.append(‘<td>‘+this.bid+‘</td>‘);
                row.append(‘<td>‘+this.btitle+‘</td>‘);
                row.append(‘<td>‘+this.bauthor+‘</td>‘);
                row.append(‘<td>‘+this.bpublic+‘</td>‘);
                row.append(‘<td><button class="btn text-primary btnupd" lang="‘+this.bid+‘" data-toggle="modal" data-target="#myModal">修改</button>‘+
                        ‘<button class="btn text-primary btndel" lang="‘+this.bid+‘">删除</button></td>‘);
                row.appendTo($("#tblbook tbody"));
                
            });