因为项目都是根据同一个项目进行修改，分开写略显冗杂 啊 开始吧
项目环境 mave3.5.4 TomCat8.5 Navicat 免安装版mysql
项目结构
实现模糊查询 显示模糊查询这个功能 主要是通过mybaits里的sql语句来实现的
select * from table_name where username like concat('%',#{username},'%')然后改写对应的controller，bean，dao，service 当然还有配置文件和页面
controller
@RequestMapping("/findUser.do") public ModelAndView findUser(@RequestParam(defaultValue = "1") int currentPage,String username){ PageInfo<User> pageInfo=userService.findUser(currentPage,username); ModelAndView modelAndView = new ModelAndView(); modelAndView.addObject("pageInfo", pageInfo); modelAndView.setViewName("user-list"); return modelAndView; }bean
package allone8.bean; import java.util.List; public class PageInfo<T> { private List<T> list; private int totalPage; private int size; private int totalCiunt; 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 getTotalCiunt() { return totalCiunt; } public void setTotalCiunt(int totalCiunt) { this.totalCiunt = totalCiunt; } public int getCurrentPage() { return currentPage; } public void setCurrentPage(int currentPage) { this.currentPage = currentPage; } }dao
List<User> findUser(@Param("start") int start,@Param("username") String username);service
@Override public PageInfo<User> findUser(int currentPage, String username) { PageInfo<User> pageInfo = new PageInfo<>(); pageInfo.setSize(5); int tc = userDao.getTotalCount(); pageInfo.setTotalPage(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.findUser(start,username); pageInfo.setList(userList); return pageInfo; }mapper里面也要改
<select id="findUser" resultType="user" > select * from tb_user where username like concat('%',#{username},'%') limit #{start},5 </select>还有相关的jsp页面
<form action="${pageContext.request.contextPath}/user/findUser.do" method="post"> <div class="col-md-4 data1"> <input type="text" class="form-control" name="username" placeholder="username" value=""> </div> <button type="submit" class="btn bg-maroon">搜索</button> </form>实现查询结果分页 要实现分页，就要在bean里面加上一个PageInfo（分页集合
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 + '}'; } }改写UserController里面的@RequestMapping("/findAll.do")
public ModelAndView findAll(@RequestParam(defaultValue = "1") int currentPage,String username,@RequestParam(defaultValue = "0")int type,HttpSession session){ PageInfo<User> pageInfo=userService.findAll(currentPage,username); ModelAndView modelAndView=new ModelAndView(); modelAndView.addObject("pageInfo",pageInfo); modelAndView.setViewName("user-list"); return modelAndView; }记得在UserService里面重写一下这个方法，因为方法不一样了
@Override public PageInfo<User> findAll(int currentPage,String username) { PageInfo<User> pageInfo=new PageInfo<>(); pageInfo.setSize(5); int tc=userDao.getTotalCount(username); 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); } //0,5,10 int start=(pageInfo.getCurrentPage()-1)*5; List<User> userList = userDao.findAll(start,username); pageInfo.setList(userList); return pageInfo; }在UserDao下新建方法
int getTotalCount(@Param("username")String username);然后在UserMapping里写sql语句获取TotalCount
<select id="getTotalCount" resultType="int"> select count(*) from tb_user <if test="username!=null and username!=''"> WHERE username LIKE concat("%",#{username},"%") </if> </select>然后要改写页面user-list的页码那一块
</div> <!-- /.box-body --> <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>重写doFilter方法
@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); } }批量删除
首先修改user-list页面，把刷新按钮改成删除，并且加入onclick事件
<button type="button" class="btn btn-default" title="删除" onclick="deleteAll()"> <i class="fa fa-refresh"></i> 删除 </button>改写body
<tbody> <c:forEach items="${pageInfo.list}" var="user"> <tr> <td><input id="ids" name="ids" type="checkbox" value="${user.id}"></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=${user.id}" class="btn bg-olive btn-xs">删除</a> <a href="#" class="btn bg-olive btn-xs">添加角色</a> </td> </tr> </c:forEach> </tbody>添加DeletedAll功能
function deleteAll() { var checkedNum=$("input[name='ids']:checked").length; alert(checkedNum); if(checkedNum==0){ alert("请至少选择一个进行删除！！！"); return; } if(confirm("确认要删除这些用户吗？")){ var userList=new Array(); $("input[name='ids']:checked").each( function () { userList.push($(this).val()) } ); alert(userList); $.ajax({ type:"post", url: "${pageContext.request.contextPath}/user/deleteAll.do", data:{userList:userList.toString()}, success:function () { alert("删除成功"); location.reload(); }, error:function () { alert("删除失败"); } }); } }在UserController里更新DeletAll方法
@RequestMapping("deleteAll.do") public String deleteAll(String userList){ String[] strs = userList.split(","); List<Integer> ids=new ArrayList<>(); for(String s:strs){ ids.add(Integer.parseInt(s)); } userService.deleteAll(ids); return "redirect:findAll.do"; }在UserMapper添加DeletAll方法
<delete id="deleteAll" parameterType="list"> delete from tb_user where id in <foreach collection="ids" item="id" open="(" close=")" separator=","> #{id} </foreach> </delete>源码：https://github.com/SBG2333/ssm2 如有不足还请dalao指点嗷
