jsp 自定义分页标签

1,标签的实现类NumenTag.java

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;

/** *//**
 * 自定义的分页标签
 *
 * @author 马万林
 *
 */
public class NumenTag extends TagSupport {

    private String url = null;

    private Result result;

    private String page = null;

    private String[] p;

    private Map kv = new HashMap();

    private List key = null;

    /** *//**
     * 分离参数
     * @param params
     */
    public void setParams(String params) {
        key = new ArrayList();
        p = params.split(";");
        for (int i = 0; p.length>1&&i < p.length; i++) {
            kv.put(p[i].split(":")[0], p[i].split(":")[1]);
            key.add(p[i].split(":")[0]);
        }
    }

    /** *//**
     * 分页的结果
     * @param result
     */
    public void setResult(String result) {
        this.result = (Result) pageContext.getRequest().getAttribute("result");
        this.page = (String) pageContext.getRequest().getAttribute("page");
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public int doStartTag() throws JspException {
        StringBuffer sb = null;
        if (result != null && result.getContent() != null
                && result.getContent().size() > 0) {
            sb = new StringBuffer("分页: ");
            if (result.getPage().getHasPrePage()){
                sb.append("<a href='").append(url);
                if (url.indexOf("?") == -1)
                    sb.append("?page=1");
                else