Java 分页问题：点击下一页，还是显示第一页的内容，而且分页导航不再显示

page类：

public class Page {

private int showCount; //每页显示记录数
private int totalPage; //总页数
private int totalResult; //总记录数
private int currentPage; //当前页
private int currentResult; //当前记录起始索引
private boolean entityOrField; //true:需要分页的地方，传入的参数就是Page实体；false:需要分页的地方，传入的参数所代表的实体拥有Page属性
private String pageStr; //最终页面显示的底部翻页导航，详细见：getPageStr();
private PageData pd = new PageData();



public Page(){
try {
this.showCount = Integer.parseInt(Tools.readTxtFile(Const.PAGE));
} catch (Exception e) {
this.showCount = 15;
}
}

public int getTotalPage() {
if(totalResult%showCount==0)
totalPage = totalResult/showCount;
else
totalPage = totalResult/showCount+1;
return totalPage;
}

public void setTotalPage(int totalPage) {
this.totalPage = totalPage;
}

public int getTotalResult() {
return totalResult;
}

public void setTotalResult(int totalResult) {
this.totalResult = totalResult;
}

public int getCurrentPage() {
if(currentPage<=0)
currentPage = 1;
if(currentPage>getTotalPage())
currentPage = getTotalPage();
return currentPage;
}

public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}

//拼接分页 页面及JS函数
public String getPageStr() {
StringBuffer sb = new StringBuffer();
if(totalResult>0){
sb.append(" <ul class=\"pagination pull-right no-margin\">\n");
if(currentPage==1){
sb.append(" <li><a>共<font color=red>"+totalResult+"</font>条</a></li>\n");
sb.append(" <li><input type=\"number\" value=\"\" id=\"toGoPage\" style=\"width:50px;text-align:center;float:left\" placeholder=\"页码\"/></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"toTZ();\" class=\"btn btn-mini btn-success\">跳转</a></li>\n");
sb.append(" <li><a>首页</a></li>\n");
sb.append(" <li><a>上页</a></li>\n");
}else{
sb.append(" <li><a>共<font color=red>"+totalResult+"</font>条</a></li>\n");
sb.append(" <li><input type=\"number\" value=\"\" id=\"toGoPage\" style=\"width:50px;text-align:center;float:left\" placeholder=\"页码\"/></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"toTZ();\" class=\"btn btn-mini btn-success\">跳转</a></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage(1)\">首页</a></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage("+(currentPage-1)+")\">上页</a></li>\n");
}
int showTag = 5;//分页标签显示数量
int startTag = 1;
if(currentPage>showTag){
startTag = currentPage-1;
}
int endTag = startTag+showTag-1;
for(int i=startTag; i<=totalPage && i<=endTag; i++){
if(currentPage==i)
sb.append("<li class=\"active\"><a><font color='white'>"+i+"</font></a></li>\n");
else
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage("+i+")\">"+i+"</a></li>\n");
}
if(currentPage==totalPage){
sb.append(" <li><a>下页</a></li>\n");
sb.append(" <li><a>尾页</a></li>\n");
}else{
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage("+(currentPage+1)+")\">下页</a></li>\n");
sb.append(" <li style=\"cursor:pointer;\"><a onclick=\"nextPage("+totalPage+")\">尾页</a></li>\n");
}
sb.append(" <li><a>共"+totalPage+"页</a></li>\n");
sb.append(" <li><select title='显示条数' style=\"width:55px;float:left;margin-top:1px;\" onchange=\"changeCount(this.value)\">\n");
sb.append(" <option value='"+showCount+"'>"+showCount+"</option>\n");
sb.append(" <option value='10'>10</option>\n");
sb.append(" <option value='20'>20</option>\n");
sb.append(" <option value='30'>30</option>\n");
sb.append(" <option value='40'>40</option>\n");
sb.append(" <option value='50'>50</option>\n");
sb.append(" <option value='60'>60</option>\n");
sb.append(" <option value='70'>70</option>\n");
sb.append(" <option value='80'>80</option>\n");
sb.append(" <option value='90'>90</option>\n");
sb.append(" <option value='99'>99</option>\n");
sb.append(" </select>\n");
sb.append(" </li>\n");

sb.append("</ul>\n");
sb.append("<script type=\"text/javascript\">\n");

//换页函数
sb.append("function nextPage(page){");
sb.append(" top.jzts();");
sb.append(" if(true && document.forms[0]){\n");
sb.append(" var url = document.forms[0].getAttribute(\"action\");\n");
sb.append(" if(url.indexOf('?')>-1){url += \"&"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" else{url += \"?"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" url = url + page + \"&" +(entityOrField?"showCount":"page.showCount")+"="+showCount+"\";\n");
sb.append(" document.forms[0].action = url;\n");
sb.append(" document.forms[0].submit();\n");
sb.append(" }else{\n");
sb.append(" var url = document.location+'';\n");
sb.append(" if(url.indexOf('?')>-1){\n");
sb.append(" if(url.indexOf('currentPage')>-1){\n");
sb.append(" var reg = /currentPage=\\d*/g;\n");
sb.append(" url = url.replace(reg,'currentPage=');\n");
sb.append(" }else{\n");
sb.append(" url += \"&"+(entityOrField?"currentPage":"page.currentPage")+"=\";\n");
sb.append(" }\n");
sb.append(" }else{url += \"?"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" url = url + page + \"&" +(entityOrField?"showCount":"page.showCount")+"="+showCount+"\";\n");
sb.append(" document.location = url;\n");
sb.append(" }\n");
sb.append("}\n");

//调整每页显示条数
sb.append("function changeCount(value){");
sb.append(" top.jzts();");
sb.append(" if(true && document.forms[0]){\n");
sb.append(" var url = document.forms[0].getAttribute(\"action\");\n");
sb.append(" if(url.indexOf('?')>-1){url += \"&"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" else{url += \"?"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" url = url + \"1&" +(entityOrField?"showCount":"page.showCount")+"=\"+value;\n");
sb.append(" document.forms[0].action = url;\n");
sb.append(" document.forms[0].submit();\n");
sb.append(" }else{\n");
sb.append(" var url = document.location+'';\n");
sb.append(" if(url.indexOf('?')>-1){\n");
sb.append(" if(url.indexOf('currentPage')>-1){\n");
sb.append(" var reg = /currentPage=\\d*/g;\n");
sb.append(" url = url.replace(reg,'currentPage=');\n");
sb.append(" }else{\n");
sb.append(" url += \"1&"+(entityOrField?"currentPage":"page.currentPage")+"=\";\n");
sb.append(" }\n");
sb.append(" }else{url += \"?"+(entityOrField?"currentPage":"page.currentPage")+"=\";}\n");
sb.append(" url = url + \"&" +(entityOrField?"showCount":"page.showCount")+"=\"+value;\n");
sb.append(" document.location = url;\n");
sb.append(" }\n");
sb.append("}\n");

//跳转函数
sb.append("function toTZ(){");
sb.append("var toPaggeVlue = document.getElementById(\"toGoPage\").value;");
sb.append("if(toPaggeVlue == ''){document.getElementById(\"toGoPage\").value=1;return;}");
sb.append("if(isNaN(Number(toPaggeVlue))){document.getElementById(\"toGoPage\").value=1;return;}");
sb.append("nextPage(toPaggeVlue);");
sb.append("}\n");
sb.append("</script>\n");
}
pageStr = sb.toString();
return pageStr;
}

public void setPageStr(String pageStr) {
this.pageStr = pageStr;
}

public int getShowCount() {
return showCount;
}

public void setShowCount(int showCount) {

this.showCount = showCount;
}

public int getCurrentResult() {
currentResult = (getCurrentPage()-1)*getShowCount();
if(currentResult<0)
currentResult = 0;
return currentResult;
}

public void setCurrentResult(int currentResult) {
this.currentResult = currentResult;
}

public boolean isEntityOrField() {
return entityOrField;
}

public void setEntityOrField(boolean entityOrField) {
this.entityOrField = entityOrField;
}

public PageData getPd() {
return pd;
}

public void setPd(PageData pd) {
this.pd = pd;
}

@Override
public String toString() {
return "Page [showCount=" + showCount + ", totalPage=" + totalPage + ", totalResult=" + totalResult
+ ", currentPage=" + currentPage + ", currentResult=" + currentResult + ", entityOrField="
+ entityOrField + ", pageStr=" + pageStr + ", pd=" + pd + "]";
}

}



页面：
<td style="vertical-align:top;"><div class="pagination" style="float: right;padding-top: 0px;margin-top: 0px;">${page.pageStr}</div></td>