jsp自定义标签实现分页
1. maven导入标签架包
javax.servlet.jsp
jsp-api
2.2
javax.servlet
javax.servlet-api
3.1.0
2. 新建分页标签wld.tld文件
1.0
1.1
wld
http://www.xxx.tld
page
welab.finance.web.common.tags.GosPage
JSP
page
true
true
action
true
true
param
welab.finance.web.common.tags.GosParam
JSP
name
true
true
value
true
true
3. web.xml中配置
http://www.xxx.tld
/WEB-INF/tld/wld.tld
4. 分页bean
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.lang.StringUtils;
/**
* 分页对象类
*
* @author rhj
*/
public class Page {
/** 当前页数* */
private int pageNum;
/** 每页显示的记录数* */
private int numPerPage;
/** 记录行数* */
private int rowsCount;
/** 总页数* */
private int pageCount;
/** 分页列表数据*/
private E list;
/**分页开始**/
private int startIndex;
/**分页结束**/
private int endIndex;
/*** action中可以自己定义每页大小，然后获取页面的下一页的页数 **/
public static Page getPage(HttpServletRequest request, int numPerPage) {
Page page = new Page();
page.setNumPerPage(numPerPage);
toPage(page, request);
return page;
}
/** 获取页面的下一页的页数 **/
public static Page getPage(HttpServletRequest request) {
Page page = new Page();
toPage(page, request);
return page;
}
/*** 获取页面的下一页的页数,并赋值当前页面页数 **/
private static void toPage(Page page, HttpServletRequest request) {
String pageNumber = request.getParameter("pageNum");
if (!StringUtils.isEmpty(pageNumber)) {
page.setPageNum(Integer.parseInt(pageNumber));
int endIndex = page.getPageNum()*page.getNumPerPage();
page.setEndIndex(endIndex);
page.setStartIndex(endIndex-page.getNumPerPage());
}
}
/*** 新建page时默认页面值 ****/
private Page() {
this.numPerPage = 10;
this.pageNum = 1;
this.startIndex = 0;
this.endIndex =10;
}
public int getNumPerPage() {
return numPerPage;
}
public void setNumPerPage(int numPerPage) {
this.numPerPage = numPerPage;
}
public int getRowsCount() {
return rowsCount;
}
public void setRowsCount(int rowsCount) {
int pageSize = (int) Math.ceil((double) rowsCount / numPerPage);
if(this.pageNum>pageSize && pageSize>=1){
this.pageNum = pageSize;
}
this.rowsCount = rowsCount;
}
public int getPageCount() {
return this.pageCount = (int) Math.ceil((double) rowsCount / numPerPage);
}
public E getList() {
return list;
}
public void setList(E list) {
this.list = list;
}
public int getStartIndex() {
return (this.pageNum - 1) * this.numPerPage;
}
public int getPageNum() {
return pageNum;
}
public void setPageNum(int pageNum) {
this.pageNum = pageNum;
}
public int getEndIndex() {
return endIndex;
}
public void setEndIndex(int endIndex) {
this.endIndex = endIndex;
}
public void setPageCount(int pageCount) {
this.pageCount = pageCount;
}
public void setStartIndex(int startIndex) {
this.startIndex = startIndex;
}
}
5. 创建分页标签处理类GosPage
package welab.finance.web.common.tags;
import java.io.IOException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.BodyTagSupport;
import org.apache.log4j.Logger;
import welab.finance.web.common.Page;
/**
* 分页标签
* @author rhj
*
*/
public class GosPage extends BodyTagSupport {
private String action;
private Page page;
private Logger logger = Logger.getLogger(getClass());
@Override
public int doStartTag() throws JspException {
return EVAL_BODY_BUFFERED;
}
@Override
public int doEndTag() throws JspException {
//标签体之间的内容
String bodyContentVal = null;
if (bodyContent != null) {
bodyContentVal = bodyContent.getString();
}
//如果页数小于0
if (page.getPageCount() <= 0) {
page.setPageNum(0);
}
StringBuilder builder = new StringBuilder();
builder.append("");
//构造js函数
builder.append("");
try {
pageContext.getOut().print(builder.toString());
} catch (IOException e) {
e.printStackTrace();
logger.error("分页标签错误",e);
}
return EVAL_PAGE;
}
public String getAction() {
return action;
}
public void setAction(String action) {
this.action = action;
}
public Page getPage() {
return page;
}
public void setPage(Page page) {
this.page = page;
}
}6. 创建标签分页参数类GosParam
import java.io.IOException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import org.apache.log4j.Logger;
/**
* 分页标签
* @author rhj
*
* 2015年4月8日
*/
public class GosParam extends TagSupport{
private Logger log=Logger.getLogger(getClass());
private String name;
private String value;
@Override
public int doStartTag() throws JspException {
return SKIP_BODY;
}
/**
* form表单的隐形框
*/
@Override
public int doEndTag() throws JspException {
StringBuilder builder = new StringBuilder();
builder.append("");
try {
pageContext.getOut().print(builder.toString());
} catch (IOException e) {
e.printStackTrace();
log.error("分页标签error",e);
}
return EVAL_PAGE;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
}7. 分页样式类page.css
.pageDiv .pageClassDisable{text-decoration: none;cursor: pointer; margin-left: 10px;color: #B0B0B0}
.pageDiv .pageClass{text-decoration: none;cursor: pointer; margin-left: 10px;}
.pageDiv .pageGO{text-decoration: none;cursor: pointer; margin-left: 10px;}
.pagespan input{width: 35px;height: 20px;border: 1px solid #B0B0B0}
.pageDiv .pageSpan{margin-left:10px;}8. jsp中引用分页
1). 引入自定义标签 <%@ taglib uri="http://www.wolaidai.tld" prefix="wld"%>
2). 引入css文件
3). 显示分页
9. java调用方法
/**
* @param model
* @return
*/
@RequestMapping(value = "/toApprovalWriteoff")
public String checkWriteoff(HttpServletRequest request,Model model,WriteoffTransactionVo writeoff,HttpSession session) {
Integer userId = (Integer) session.getAttribute(FrsConstant.LOGIN_USER_ID);
writeoff.setApprovalId(userId);
Page> page = Page.getPage(request);
int rowsCount = writeoffTransferRetriever.getWriteoffTransactionsVosForApprovalCount(writeoff);
page.setRowsCount(rowsCount);
List writeoffList =
writeoffTransferRetriever.getWriteoffTransactionsVosForApproval(writeoff,page.getStartIndex(),page.getEndIndex());
model.addAttribute("writeoffList", writeoffList);
model.addAttribute("page", page);
return "/writeoff/approval_writeoff";
} 10. 分页效果展现
下班喽~~~~