目录
步骤pageinfouserControlleruserServiceuser-list.jspgetTotalCount拦截器web.xml配置LoginFiltercontroller
分页结果截图
步骤
1、建立pageinfo类 2、修改userController 3、修改userService 4、修改user-list.jsp 5、getTotalCount的实现 6、拦截器
pageinfo
import java
.util
.List
;
public class PageInfo<T> {
private List
<T> list
;
private int totalPage
;
private int size
;
private int totalCount
;
private int currentPage
;
public List
<T> getList() {
return list
;
}
public void setList(List
<T> list
) {
this.list
= list
;
}
public int
getTotalPage() {
return totalPage
;
}
public void setTotalPage(int totalPage
) {
this.totalPage
= totalPage
;
}
public int
getSize() {
return size
;
}
public void setSize(int size
) {
this.size
= size
;
}
public int
getTotalCount() {
return totalCount
;
}
public void setTotalCount(int totalCount
) {
this.totalCount
= totalCount
;
}
public int
getCurrentPage() {
return currentPage
;
}
public void setCurrentPage(int currentPage
) {
this.currentPage
= currentPage
;
}
@Override
public String
toString() {
return "PageInfo{" +
"list=" + list
+
", totalPage=" + totalPage
+
", size=" + size
+
", totalCount=" + totalCount
+
", currentPage=" + currentPage
+
'}';
}
}
userController
@Controller
@
RequestMapping("/user")
public class UserController {
@Autowired
private IUserService userService
;
@
RequestMapping("/login.do")
public ModelAndView
login(User user
, HttpSession session
) {
boolean flag
= userService
.login(user
.getUsername(), user
.getPassword());
ModelAndView modelAndView
= new ModelAndView();
if (flag
) {
session
.setAttribute("user",user
);
modelAndView
.setViewName("main");
} else {
modelAndView
.setViewName("../failer");
}
return modelAndView
;
}
@
RequestMapping("/findAll.do")
public ModelAndView
findAll(@
RequestParam(defaultValue
= "1") int currentPage
) {
PageInfo
<User
> pageInfo
= userService
.findAll(currentPage
);
ModelAndView modelAndView
= new ModelAndView();
modelAndView
.addObject("pageInfo", pageInfo
);
modelAndView
.setViewName("user-list");
return modelAndView
;
}
@
RequestMapping("/deleteById.do")
public String
delete(int id
) {
userService
.deleteById(id
);
return "redirect:findAll.do";
}
@
RequestMapping("/add.do")
public String
add(User user
) {
userService
.add(user
);
return "redirect:findAll.do";
}
@
RequestMapping("/toUpdate.do")
public ModelAndView
toUpdate(int id
) {
User user
= userService
.selectUserById(id
);
ModelAndView modelAndView
= new ModelAndView();
modelAndView
.setViewName("user-update");
modelAndView
.addObject("user", user
);
return modelAndView
;
}
@
RequestMapping("/update.do")
public String
update(User user
) {
userService
.update(user
);
return "redirect:findAll.do";
}
}
userService
@Service
public class UserService implements IUserService {
@Autowired
private UserDao userDao
;
@Override
public boolean
login(String username
, String password
) {
User user
=userDao
.findUserByUserName(username
);
if (user
!=null && user
.getPassword().equals(password
)){
return true;
}
return false;
}
@Override
public PageInfo
<User
> findAll(int currentPage
) {
PageInfo
<User
> pageInfo
=new PageInfo<>();
pageInfo
.setSize(5);
int tc
=userDao
.getTotalCount();
pageInfo
.setTotalCount(tc
);
int tp
=(int
)Math
.ceil(tc
/5.0);
pageInfo
.setTotalPage(tp
);
if (currentPage
<1){
pageInfo
.setCurrentPage(1);
}else if (currentPage
>tp
){
pageInfo
.setCurrentPage(tp
);
}else {
pageInfo
.setCurrentPage(currentPage
);
}
int start
=(pageInfo
.getCurrentPage()-1)*5;
List
<User
> userList
=userDao
.findAll(start
);
pageInfo
.setList(userList
);
return pageInfo
;
}
@Override
public void deleteById(int id
) {
userDao
.deleteById(id
);
}
@Override
public void add(User user
) {
userDao
.add(user
);
}
@Override
public User
selectUserById(int id
) {
return userDao
.selectById(id
);
}
@Override
public void update(User user
) {
userDao
.update(user
);
}
}
user-list.jsp
<tbody
>
<c
:forEach items
="${pageInfo.list}" var="user">
<tr
>
<td
><input name
="ids" type
="checkbox"></td
>
<td
>$
{user
.id
}</td
>
<td
>$
{user
.username
}</td
>
<td
>$
{user
.password
}</td
>
<td
class="text-center">
<a href
="${pageContext.request.contextPath}/user/toUpdate.do?id=${user.id}" class="btn bg-olive btn-xs">更新
</a
>
<a href
="${pageContext.request.contextPath}/user/deleteById.do?id=${user.id}" class="btn bg-olive btn-xs">删除
</a
>
<a href
="#" class="btn bg-olive btn-xs">添加角色
</a
>
</td
>
</tr
>
</c
:forEach
>
</tbody
>
<div
class="box-tools pull-right">
<ul
class="pagination">
<li
><a href
="${pageContext.request.contextPath}/user/findAll.do" aria
-label
="Previous">首页
</a
></li
>
<li
><a href
="${pageContext.request.contextPath}/user/findAll.do?currentPage=${pageInfo.currentPage-1}">上一页
</a
></li
>
<c
:forEach begin
="1" end
="${pageInfo.totalPage}" var="pageNum">
<li
><a href
="${pageContext.request.contextPath}/user/findAll.do?currentPage=${pageNum}">$
{pageNum
}</a
></li
>
</c
:forEach
>
<li
><a href
="${pageContext.request.contextPath}/user/findAll.do?currentPage=${pageInfo.currentPage+1}">下一页
</a
></li
>
<li
><a href
="${pageContext.request.contextPath}/user/findAll.do?currentPage=${pageInfo.totalPage}" aria
-label
="Next">尾页
</a
></li
>
</ul
>
</div
>
getTotalCount
int
getTotalCount();
拦截器
web.xml配置
<filter
>
<filter
-name
>loginFilter
</filter
-name
>
<filter
-class>com
.zhongruan
.filter
.LoginFilter
</filter
-class>
</filter
>
<filter
-mapping
>
<filter
-name
>loginFilter
</filter
-name
>
<url
-pattern
>*.do</url
-pattern
>
</filter
-mapping
>
LoginFilter
public class LoginFilter implements Filter {
@Override
public void init(FilterConfig filterConfig
) throws ServletException
{
}
@Override
public void doFilter(ServletRequest servletRequest
, ServletResponse servletResponse
, FilterChain filterChain
) throws IOException
, ServletException
{
HttpServletRequest request
=(HttpServletRequest
) servletRequest
;
HttpServletResponse response
= (HttpServletResponse
) servletResponse
;
HttpSession session
=request
.getSession();
User user
=(User
) session
.getAttribute("user");
String uri
=request
.getRequestURI();
if (user
==null && uri
.indexOf("login.do")==-1){
response
.sendRedirect(request
.getContextPath()+"../login.jsp");
}else {
filterChain
.doFilter(request
,response
);
}
}
@
Override()
public void destroy() {
}
}
controller
@
RequestMapping("/login.do")
public ModelAndView
login(User user
, HttpSession session
) {
boolean flag
= userService
.login(user
.getUsername(), user
.getPassword());
ModelAndView modelAndView
= new ModelAndView();
if (flag
) {
session
.setAttribute("user",user
);
modelAndView
.setViewName("main");
} else {
modelAndView
.setViewName("../failer");
}
return modelAndView
;
}
分页结果截图
分别是第一页 第二页 第三页 拦截器就不截图了···
