ssm实现分页和拦截未登录访问（接上篇

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

import com.zhongruan.bean.PageInfo;
import com.zhongruan.bean.User;
import com.zhongruan.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpSession;
import java.util.List;

@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";
}
}

UserDao

import com.zhongruan.bean.User;

import java.util.List;

public interface UserDao {
User findUserByUserName(String username);

List<User> findAll(int start);

void deleteById(int id);

void add(User user);

User selectById(int id);

void update(User user);

int getTotalCount();
}

LoginFilter

import User;
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

public class loginFilter implements Filter{
@Override
public void init(FilterConfig filterConfig) throws ServletException {

}

@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) 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 {
chain.doFilter(request,response);
}
}

@Override
public void destroy() {

}
}

UserService

import com.zhongruan.bean.PageInfo;
import com.zhongruan.bean.User;
import com.zhongruan.dao.UserDao;
import com.zhongruan.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@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 totalCount=userDao.getTotalCount();
pageInfo.setTotalCount(totalCount);
int totalPage=(int)Math.ceil(totalCount/5.0);
pageInfo.setTotalPage(totalPage);
if (currentPage<1){
pageInfo.setCurrentPage(1);
} else if (currentPage>totalPage){
pageInfo.setCurrentPage(totalPage);
}else {
pageInfo.setCurrentPage(currentPage);
}
int start=(pageInfo.getCurrentPage()-1)*5;
List<User> userList = userDao.findAll(start);
pageInfo.setList(userList);
pageInfo.setCurrentPage(currentPage);
return pageInfo;
}

//    @Override
//    public List<User> findAll() {
//        return userDao.findAll();
//    }

@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);
}

}

IUserService

import com.zhongruan.bean.PageInfo;
import com.zhongruan.bean.User;

import java.util.List;

public interface IUserService {
boolean login(String username,String password);

PageInfo<User> findAll(int currentPage);

void deleteById(int id);

void add(User user);

User selectUserById(int id);

void update(User user);
}

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
version="3.1">

<!-- 配置加载类路径的配置文件 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:applicationContext.xml</param-value>
</context-param>

<!-- 配置监听器 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>

<!-- 解决中文乱码过滤器 -->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<!-- 前端控制器（加载classpath:spring-mvc.xml 服务器启动创建servlet） -->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置初始化参数，创建完DispatcherServlet对象，加载springmvc.xml配置文件 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<!-- 服务器启动的时候，让DispatcherServlet对象创建 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

<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>
</web-app>

分页jsp

<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>