注意：jsp页面需要 bootstrap与layer前端框架 package cn.ajax.entity;
2
3 public class Student {
4 private int stuId;// int(5) NOT NULL学生id，主键
5 private String stuName;// varchar(30) NOT NULL学生姓名
6 private String pwd;// varchar(255) NULL密码
7
8 public Student() {
9 }
10
11 public Student(int stuId, String stuName, String pwd) {
12 this .stuId = stuId;
13 this .stuName = stuName;
14 this .pwd = pwd;
15 }
16
17 @Override
18 public String toString() {
19 return "Student{" +
20 "stuId=" + stuId +
21 ", stuName='" + stuName + '\'' +
22 ", pwd='" + pwd + '\'' +
23 '}';
24 }
25
26 public int getStuId() {
27 return stuId;
28 }
29
30 public void setStuId(int stuId) {
31 this .stuId = stuId;
32 }
33
34 public String getStuName() {
35 return stuName;
36 }
37
38 public void setStuName(String stuName) {
39 this .stuName = stuName;
40 }
41
42 public String getPwd() {
43 return pwd;
44 }
45
46 public void setPwd(String pwd) {
47 this .pwd = pwd;
48 }
49 }
1 package cn.ajax.dao;
2
3 import cn.ajax.entity.Student;
4 import cn.ajax.util.DataUtil;
5 import org.apache.commons.dbutils.QueryRunner;
6 import org.apache.commons.dbutils.handlers.BeanHandler;
7 import org.apache.commons.dbutils.handlers.BeanListHandler;
8 import org.apache.commons.dbutils.handlers.ScalarHandler;
9
10 import java.sql.SQLException;
11 import java.util.HashSet;
12 import java.util.Iterator;
13 import java.util.List;
14 import java.util.Set;
15
16 public class StudentDao {
17 private QueryRunner runner = new QueryRunner(DataUtil.dataSource);
18
19 public static void main(String[] args) {
20 List s = new StudentDao().listStudentByName("",0,10);
21 for (Student student : s) {
22 System.out.println(student);
23 }
24 }
25
26
27 /**
28 * 查询
29 * @param name
30 * @return
31 */
32 public List listStudentByName(String name,int startIndex,int pageSize){
33 String sql = "select * from tblstudent where stuName like concat('%',?,'%') and stuId>22 order by stuId desc limit ?,?";
34 System.out.println("分页数据sql显示："+sql);
35 try {
36 return runner.query(sql,new BeanListHandler<>(Student.class ),name,startIndex,pageSize);
37 } catch (SQLException e) {
38 e.printStackTrace();
39 throw new RuntimeException("listStudentByNamesql异常");
40 }
41 }
42
43 /**
44 * 统计学生总数量
45 * @param name
46 * @return
47 */
48 public int countStudentByName(String name){
49 String sql = "select count(1) from tblstudent where stuName like concat('%',?,'%') and stuId > 22 order by stuId desc";
50 try {
51 return ((Long) runner.query(sql, new ScalarHandler(),name)).intValue();
52 } catch (SQLException e) {
53 e.printStackTrace();
54 throw new RuntimeException("countStudentByNamesql异常");
55 }
56 }
57
58 /**
59 * 根据id查找对象
60 * @param id
61 * @return
62 */
63 public Student findStudentById(int id){
64 try {
65 return runner.query("select * from tblstudent where stuId = ?",new BeanHandler<>(Student.class ),id);
66 } catch (SQLException e) {
67 e.printStackTrace();
68 throw new RuntimeException("findStudentByIdsql异常");
69 }
70 }
71
72 /**
73 * 新增
74 * @param student
75 * @return
76 */
77 public int doAddStudent(Student student){
78 try {
79 return runner.update("insert into tblstudent(stuName,pwd)values(?,?)",student.getStuName(),student.getPwd());
80 } catch (SQLException e) {
81 e.printStackTrace();
82 throw new RuntimeException("doAddStudentsql异常");
83 }
84 }
85
86 /**
87 * 根据id删除
88 * @param ids
89 * @return
90 */
91 public int doRemvoeStudentById(Set ids){
92 if (ids!=null && ids.size()!=0){
93 StringBuffer sql = new StringBuffer();
94 sql.append("delete from tblstudent where stuId in(");
95 Iterator iteid = ids.iterator();
96 while (iteid.hasNext()){
97 sql.append(iteid.next()).append(",");
98 }
99 sql.delete(sql.length()-1,sql.length());
100 sql.append(")");
101 System.out.println("sql语句"+sql);
102 try {
103 return runner.update(sql.toString());
104 } catch (SQLException e) {
105 e.printStackTrace();
106 throw new RuntimeException("doRemvoeStudentByIdsql异常");
107 }
108 }
109 throw new RuntimeException("doRemvoeStudentByIdsql参数为空异常");
110 }
111
112 /**
113 * 根据id修改全部数据
114 * @param student
115 * @return
116 */
117 public int doUpdateStudent(Student student) {
118 try {
119 return runner.update("update tblstudent set stuName=?,pwd=? where stuId = ?",student.getStuName(),student.getPwd(), student.getStuId());
120 } catch (SQLException e) {
121 e.printStackTrace();
122 throw new RuntimeException("doUpdateStudentsql异常");
123 }
124 }
125 }
1 package cn.ajax.servlet;
2
3 import cn.ajax.dao.StudentDao;
4 import cn.ajax.entity.Student;
5 import cn.ajax.util.PageUtil;
6 import com.alibaba.fastjson.JSONObject;
7
8 import javax.servlet.ServletException;
9 import javax.servlet.annotation.WebServlet;
10 import javax.servlet.http.HttpServlet;
11 import javax.servlet.http.HttpServletRequest;
12 import javax.servlet.http.HttpServletResponse;
13 import java.io.IOException;
14 import java.io.PrintWriter;
15 import java.lang.reflect.Array;
16 import java.util.Arrays;
17 import java.util.HashSet;
18 import java.util.List;
19 import java.util.Set;
20
21 @WebServlet("/student")
22 public class StudentServlet extends HttpServlet {
23
24 private StudentDao sd = new StudentDao();
25
26 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
27 doGet(request,response);
28 }
29
30 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
31 String stu = request.getParameter("stu");
32 if ("list".equals(stu)){
33 stulist(request,response);
34 }else if ("change".equals(stu)){
35 stuaddORupdate(request,response);
36 }else if ("remove".equals(stu)){
37 sturemove(request,response);
38 }else if ("findbyidd".equals(stu)){
39 findbyid(request,response);
40 }
41 }
42
43 /**
44 * 根据id查询对象
45 * @param request
46 * @param response
47 */
48 private void findbyid(HttpServletRequest request, HttpServletResponse response) throws IOException {
49 int id = Integer.parseInt(request.getParameter("updatebyid"));
50 Student studentById = sd.findStudentById(id);
51 String s = JSONObject.toJSONString(studentById);
52 PrintWriter writer = response.getWriter();
53 writer.write(s);
54 writer.close();
55 }
56
57 /**
58 * 根据id删除对象
59 * @param request
60 * @param response
61 * @throws IOException
62 */
63 private void sturemove(HttpServletRequest request, HttpServletResponse response) throws IOException {
64 String removeid = request.getParameter("removeid");// 接收ajax传过来的数据
65 PrintWriter writer = response.getWriter();// 输出对象
66 String msg = "0";// 返回的参数
67 if (!(removeid==null && "".equals(removeid))){
68 // 分割去重
69 String[] split = removeid.split(",");
70 System.out.println("拿到的字符串："+ Arrays.toString(split));
71 Set set = new HashSet<>();// 去重
72 for (String s : split) {
73 set.add(Integer.parseInt(s));
74 }
75 // 调用dao层方法作删除
76 int i = sd.doRemvoeStudentById(set);
77 msg = i+"";
78 }
79 writer.write(msg);// 输出数据到页面的ajax函数中
80 writer.close();// 关闭流
81 }
82
83 /**
84 * 新增或者修改change
85 * @param request
86 * @param response
87 */
88 private void stuaddORupdate(HttpServletRequest request, HttpServletResponse response) throws IOException {
89 String insertid = request.getParameter("insertid");
90 String uname = request.getParameter("uname");
91 String upwd = request.getParameter("upwd");
92 PrintWriter writer = response.getWriter();
93 Student student = new Student();
94 String msg = "0";
95 // 开始新增
96 System.out.println(insertid+"参数id");
97 if (insertid==null || "".equals(insertid)) {
98 student.setStuName(uname);
99 student.setPwd(upwd);
100 int i = sd.doAddStudent(student);
101 msg = i + "";
102 }else {
103 // 开始修改
104 student.setStuId(Integer.parseInt(insertid));
105 student.setPwd(upwd);
106 student.setStuName(uname);
107 int i = sd.doUpdateStudent(student);
108 msg = i + "";
109 }
110 writer.write(msg);
111 writer.close();
112 }
113
114 /**
115 * 模糊查询
116 * @param request
117 * @param response
118 */
119 private void stulist(HttpServletRequest request, HttpServletResponse response) throws IOException {
120 PageUtil util = new PageUtil<>();
121 String kyword = request.getParameter("keyword");
122 String pageIndexs = request.getParameter("pageIndexs");
123 util.setPageSize(5);// 每页多少条数据
124 if (pageIndexs==null || "".equals(pageIndexs) || "undefined".equals(pageIndexs)){
125 pageIndexs = "1";
126 }
127 util.setStartPage(Integer.parseInt(pageIndexs));// 第一页开始
128 int startIndex = (util.getStartPage()-1)*util.getPageSize();// 0 5；5 5；10 5，
129 List students = sd.listStudentByName(kyword,startIndex,util.getPageSize());
130 util.setList(students);// 页面数据集合
131 util.setTotalData(sd.countStudentByName(kyword));// 数据总量
132
133 // 将数据转换为json格式的字符串
134 String jsonString = JSONObject.toJSONString(util);
135 System.out.println(jsonString);
136 // String jsonString = JSONObject.toJSONString(students);
137 PrintWriter writer = response.getWriter();
138 writer.write(jsonString);
139 writer.close();// 输出到页面
140 }
141 }
1 package cn.ajax.filter;
2
3 import javax.servlet.*;
4 import javax.servlet.annotation.WebFilter;
5 import java.io.IOException;
6
7 @WebFilter("/*")
8 public class StudentFilter implements Filter {
9 public void destroy() {
10 }
11
12 public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
13 req.setCharacterEncoding("utf-8");
14 resp.setCharacterEncoding("utf-8");
15 chain.doFilter(req, resp);
16 }
17
18 public void init(FilterConfig config) throws ServletException {
19
20 }
21
22 }
1 package cn.ajax.util;
2
3 import com.mchange.v2.c3p0.ComboPooledDataSource;
4
5 public class DataUtil {
6 public static ComboPooledDataSource dataSource = new ComboPooledDataSource("mysql");
7 }
8
9
10 // pageBean
11 package cn.ajax.util;
12
13 import java.util.List;
14
15 /**
16 * 分页类
17 */
18 public class PageUtil {
19 private int startPage=1;// 第一页
20 private int pageSize=5;// 分页每页容量
21 private List list;// 每页容量中的数据
22 private int totalPage;// 总页数量
23 private int totalData;// 数据总数量
24
25 public PageUtil() {
26 }
27
28 public int getStartPage() {
29 return startPage;
30 }
31
32 public void setStartPage(int startPage) {
33 if (startPage < 1){
34 this .startPage = 1;
35 }
36 this .startPage = startPage;
37 }
38
39 public int getPageSize() {
40 return pageSize;
41 }
42
43 public void setPageSize(int pageSize) {
44 if (pageSize < 1){
45 this .pageSize = 5;
46 }
47 this .pageSize = pageSize;
48 }
49
50 public List getList() {
51 return list;
52 }
53
54 public void setList(List list) {
55 this .list = list;
56 }
57
58 /**
59 * 共有多少页
60 * @return
61 */
62 public int getTotalPage() {
63 int sumPage = (this .totalData-1)/this .pageSize + 1;
64 return sumPage;
65 }
66
67 public void setTotalPage(int totalPage) {
68 this .totalPage = totalPage;
69 }
70
71 public int getTotalData() {
72 return totalData;
73 }
74
75 public void setTotalData(int totalData) {
76 this .totalData = totalData;
77 }
78 }
1 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
2 <%--
3 Created by IntelliJ IDEA.
4 User: 冰与火之歌
5 Date: 2019/8/30
6 Time: 22:44
7 To change this template use File | Settings | File Templates.
8 --%>
9 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
10
11
12 列表
13 14
15
16 17
18
19
20
21
22
23
24
25
26 class="container">
27 class="panel panel-primary">
28 class="panel-heading">
29 <%--c3p0+mysql+bootstrap+javascript+jquery+ajax--%>
30
使用ajax异步加载用户数据
31
32 class="panel-body">
33
40
54
55 <%--分页条--%>
56
57 class="pagination" id="splitPage">
58
59
60 61 class="panel-footer text-right">
62 李某人为您服务
63
64 65 66
67
68 class="modal fade" id="myModal" role="dialog" aria-labelledby="myModalLabel" aria-hidden="true">
69 class="modal-dialog">
70 class="modal-content">
71 class="modal-header">
72 class="close" data-dismiss="modal" aria-hidden="true">
73 ×
74
75
class="modal-title" id="myModalLabel">
76 添加(修改)一个用户
77
78
79 class="modal-body">
80
81
104
105 106 107 108 109
110
111
112
303
304
