JAVA分页

public class Page {

    public static void main(String[] args) {
        Page pg=new Page();
        String str=pg.pagestr("http://www.abc.com?",195,11,10,8);
        System.out.print(str);
    }
//url连接，countdatas表数据总行数，currentpage第几页（0是第一页），everpage每页多少行,beforlaterln前后长度
    public String pagestr(String url,int countdatas,int currentpage,int everpage,int beforlaterln) {
        String page= "";
        int intpart = countdatas/everpage;//整数
        int remainderpart = countdatas%everpage;//余数
        int countpage = intpart;//取整数
        currentpage = currentpage<0 ? 0:currentpage;
        if(remainderpart==0){//余数判断
            currentpage=currentpage>countpage-1?countpage-1:currentpage;
            int pp=currentpage+1;
            String strbe="";
            int pagebefore=pp-beforlaterln-1;
            for(int i=pp; i > pagebefore; i--){
                if(i>0 && i<pp){
                    strbe="<a class='num' href='"+url+"&p="+(i-1)+"'>"+i+"</a>"+strbe;
                }
            }
            if(pp<=1){strbe="";}else{strbe="<a class='num' href='"+url+"&p=0'>首页</a>"+"<a class='num' href='"+url+"&p="+(pp-2)+"'>上一页</a>"+strbe;}
            String strmid="<span class='current'>"+pp+"</span>";
            String strlater="";
            int pagelater=pp+beforlaterln;
            for(int i=pp; i < pagelater; i++){
                if(i<countpage){
                    strlater+="<a class='num' href='"+url+"&p="+(i)+"'>"+(i+1)+"</a>";
                }
            }
            if(pp>=countpage){}else{strlater+="<a class='num' href='"+url+"&p="+pp+"'>下一页</a>"+"<a class='num' href='"+url+"&p="+(countpage-1)+"'>尾页</a>";}
            page=strbe+strmid+strlater;
        }else {
            countpage+=1;//总页数
            currentpage=currentpage>countpage-1?countpage-1:currentpage;
            int pp=currentpage+1;
            String strbe="";
            int pagebefore=pp-beforlaterln-1;
            for(int i=pp; i > pagebefore; i--){ 
                if(i>0 && i<pp){
                    strbe="<a class='num' href='"+url+"&p="+(i-1)+"'>"+i+"</a>"+strbe;
                }
            }
            if(pp<=1){strbe="";}else{strbe="<a class='num' href='"+url+"&p=0'>首页</a>"+"<a class='num' href='"+url+"&p="+(pp-2)+"'>上一页</a>"+strbe;}
            String strmid="<span class='current'>"+pp+"</span>";
            String strlater="";
            int pagelater=pp+beforlaterln;
            for(int i=pp; i < pagelater; i++){
                if(i<countpage){
                    strlater+="<a class='num' href='"+url+"&p="+(i)+"'>"+(i+1)+"</a>";
                }
            }
            if(pp>=countpage){}else{strlater+="<a class='num' href='"+url+"&p="+pp+"'>下一页</a>"+"<a class='num' href='"+url+"&p="+(countpage-1)+"'>尾页</a>";}
            page=strbe+strmid+strlater;
        }
        return "共"+countpage+"页"+page;
    }
    
}

共20页<a class='num' href='http://www.abc.com?&p=0'>首页</a>
<a class='num' href='http://www.abc.com?&p=10'>上一页</a>
<a class='num' href='http://www.abc.com?&p=3'>4</a>
<a class='num' href='http://www.abc.com?&p=4'>5</a>
<a class='num' href='http://www.abc.com?&p=5'>6</a>
<a class='num' href='http://www.abc.com?&p=6'>7</a>
<a class='num' href='http://www.abc.com?&p=7'>8</a>
<a class='num' href='http://www.abc.com?&p=8'>9</a>
<a class='num' href='http://www.abc.com?&p=9'>10</a>
<a class='num' href='http://www.abc.com?&p=10'>11</a>
<span class='current'>12</span>
<a class='num' href='http://www.abc.com?&p=12'>13</a>
<a class='num' href='http://www.abc.com?&p=13'>14</a>
<a class='num' href='http://www.abc.com?&p=14'>15</a>
<a class='num' href='http://www.abc.com?&p=15'>16</a>
<a class='num' href='http://www.abc.com?&p=16'>17</a>
<a class='num' href='http://www.abc.com?&p=17'>18</a>
<a class='num' href='http://www.abc.com?&p=18'>19</a>
<a class='num' href='http://www.abc.com?&p=19'>20</a>
<a class='num' href='http://www.abc.com?&p=12'>下一页</a>
<a class='num' href='http://www.abc.com?&p=19'>尾页</a>