分页 java_java实现分页显示效果

本文实例为大家分享了java实现页显示效果的具体代码，供大家参考，具体内容如下

效果图如下：

实现步骤：

1.创建实体User.class,参考代码如下：

public class User {

private String name;

private int age;

private String gender;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public String getGender() {

return gender;

}

public void setGender(String gender) {

this.gender = gender;

}

public User(String name, int age, String gender) {

super();

this.name = name;

this.age = age;

this.gender = gender;

}

public User() {

}

}

2.创建分页模型PageBean.class,参考代码如下：

public class PageBean {

private int pageNum;

private int pageSize;

private int totalRecord;

private int totalPage;

private List list;

private int start;

private int end;

private int fromIndex;

private int toIndex;

public PageBean(int pageNum, int pageSize, int totalRecord) {

this.pageNum = pageNum;

this.pageSize = pageSize;

this.totalRecord = totalRecord;

fromIndex=(pageNum-1)*pageSize;

toIndex=pageNum*pageSize>totalRecord?totalRecord:pageNum*pageSize;

if (totalRecord % pageSize == 0) {

this.totalPage = totalRecord / pageSize;

} else {

this.totalPage = totalRecord / pageSize + 1;

}

start = 1;

end = 5;

if (totalPage <= 5) {

end = this.totalPage;

} else {

start = pageNum - 2;

end = pageNum + 2;

if (start < 1) {

start = 1;

end = 5;

}

if (end > this.totalPage) {

end = totalPage;

start = end - 5;

}

}

}

public int getPageNum() {

return pageNum;

}

public void setPageNum(int pageNum) {

this.pageNum = pageNum;

}

public int getPageSize() {

return pageSize;

}

public void setPageSize(int pageSize) {

this.pageSize = pageSize;

}

public int getTotalRecord() {

return totalRecord;

}

public int getFromIndex() {

return fromIndex;

}

public void setFromIndex(int fromIndex) {

this.fromIndex = fromIndex;

}

public int getToIndex() {

return toIndex;

}

public void setToIndex(int toIndex) {

this.toIndex = toIndex;

}

public void setTotalRecord(int totalRecord) {

this.totalRecord = totalRecord;

}

public int getTotalPage() {

return totalPage;

}

public void setTotalPage(int totalPage) {

this.totalPage = totalPage;

}

public List getList() {

return list;

}

public void setList(List list) {

this.list = list.subList(fromIndex, toIndex);

}

public int getStart() {

return start;

}

public void setStart(int start) {

this.start = start;

}

public int getEnd() {

return end;

}

public void setEnd(int end) {

this.end = end;

}

}

3.创建jsp页面，参考代码如下：

/**

*index.jsp

*/

分页显示

/**

*main.jsp

*/

pageEncoding="UTF-8"%>

function gos() {

var pageNum = $.trim($("#pageNum").val());

if(isNaN(pageNum)){

alert("输入的不是数字 ，请输入数字！");

return ;

}

if(pageNum==""){

alert("输入为空，请重新输入！");

return ;

}

if(pageNum<1||pageNum>${requestScope.pageBean.totalPage}){

alert("超出范围，请重新输入！");

return ;

}

location.href="${pageContext.request.contextPath}/main?pageNum=" rel="external nofollow" +pageNum;

}

4.创建Servlets.class，参考代码如下：

@WebServlet("/main")

public class Servlets extends HttpServlet {

@Override

protected void service(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

String page = request.getParameter("pageNum");

int pageNum = Integer.parseInt((page == null ? "1" : page));

int pageSize = 5;

Service s = new Service();

PageBean pb = s.findAll(pageNum, pageSize);

request.setAttribute("pageBean", pb);

request.getRequestDispatcher("/main.jsp").forward(request, response);

}

}

5.创建Service.class，参考代码如下：

public class Service {

public PageBean findAll(int pageNum, int pageSize) {

UserDao userDao = new UserDao();

List users = userDao.findAll();

int totalRecord = users.size();

PageBean pb = new PageBean<>(pageNum, pageSize, totalRecord);

pb.setList(users);

return pb;

}

}

6.创建UserDao.class，参考代码如下：

public class UserDao {

List users=new ArrayList<>();

User user;

public List findAll(){

for(int i=1;i<99;i++){

user=new User("name-"+i, (int)(100*Math.random()), (int)(10*Math.random())%2==1?"男":"女");

users.add(user);

}

return users;

}

}

需注意的问题：

1.需在WebContent下创建文件夹jquery，在他里面放入jquery.min.js这个文件。否则跳转功能异常。

2.index.jsp与main.jsp都在WebContent文件夹下。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。