Java项目:简单留言板同学(java+SSM+mysql+jsp)
主要功能有：同学录管理、班级留言管理、个人信息管理、班级相册管理。
运行环境：mysql5.7 tomcat7.0/8.5 eclipse navicat jdk1.8
用户控制层：
@Controller
@RequestMapping("UsersServlet")
public class UsersController {
private UsersDao usersDao = new UsersDao();
@Autowired
private HttpServletRequest request;
@RequestMapping("/loginadmin")
public String loginadmin() {
String username = request.getParameter("username");
String password = request.getParameter("password");
Users users = usersDao.login(username, password);
if (users != null) {
request.getSession().setAttribute("loginUsers", users);
return "admin_index";
} else {
request.setAttribute("msg", "登录失败，账号密码不匹配");
return "admin_login";
}
}
@RequestMapping("/userlogin")
public String userlogin() {
String userName = request.getParameter("username");
String password = request.getParameter("password");
String clientCheckcode = request.getParameter("validateCode");
String serverCheckcode = (String) request.getSession().getAttribute("checkcode");
if (clientCheckcode.equals(serverCheckcode)) {
// 2. 去访问dao ， 看看是否满足登录。
Users Users = usersDao.userlogin(userName, password);
// 3. 针对dao的返回结果，做出响应
if (Users != null) {
request.getSession().setAttribute("usersLogin", Users);
CategoryDao categoryDao = new CategoryDao();
List<Category> categoryList = categoryDao.queryAll();
request.setAttribute("categoryList", categoryList.stream().filter(x -> x.getState().equals("1")).collect(Collectors.toList()));
return "index";
} else {
request.setAttribute("error", "用户名或密码错误！");
return "login";
}
} else {
request.setAttribute("error", "登录失败，验证码不正确！");
return "login";
}
}
@RequestMapping("/userreg")
public String userreg() {
String username = request.getParameter("username");
String password = request.getParameter("password");
String account = request.getParameter("account");
String email = request.getParameter("email");
String password2 = request.getParameter("password2");
if (!password.equals(password2)) {
request.setAttribute("error", "注册失败，密码与确认密码不一致！");
return "reg";
} else {
boolean isSuccess = usersDao.isReg(account);
if (!isSuccess) {
request.setAttribute("error", "注册失败，该用户名已存在！");
return "reg";
} else {
usersDao.reg(username, account, password, email);
request.setAttribute("error", "注册成功！");
return "reg";
}
}
}
@RequestMapping("/listforadmin")
public String listforadmin() {
List<Users> list = usersDao.getUsers();
request.setAttribute("list", list);
return "listusers";
}
@RequestMapping("/del")
public String del(Integer id) {
usersDao.del(id);
List<Users> list = usersDao.getUsers();
request.setAttribute("list", list);
return "listusers";
}
}
数据库连接工具：
public class DbUtil {
private static final String URL = "jdbc:mysql://localhost:3306/dbnews?useUnicode=true&characterEncoding=utf8";
private static final String USERNAME = "";
private static final String PASSWORD = "";
public static Connection getConnection() {
Connection conn = null;
try {
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection(URL, USERNAME, PASSWORD);
return conn;
} catch (ClassNotFoundException e) {
e.printStackTrace();
return null;
} catch (SQLException e) {
e.printStackTrace();
return null;
}
}
/**
* ��ɾ��ͨ��
*
* @param sql
* @param params
* @return
*/
public static boolean update(String sql, Object... params) {
// TODO Auto-generated method stub
// ������
boolean flag = false;
// ��ȡ���Ӷ���
Connection conn = DbUtil.getConnection();
try {
conn.setAutoCommit(false);
} catch (SQLException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// ��ȡ��������
PreparedStatement pstm = null;
try {
pstm = conn.prepareStatement(sql);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// ��SQL�������ֵ
try {
if (params != null) {
for (int i = 0; i < params.length; i++) {
pstm.setObject(i + 1, params[i]);
}
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// ִ��SQL���
int state = 0;
try {
state = pstm.executeUpdate();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (state > 0) {
// �ɹ� �ύ����
flag = true;
// �ύ����
try {
conn.commit();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
// ʧ�� �ع�����
flag = false;
try {
conn.rollback();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return flag;
}
public List<Category> listCategory(String sql, Object... params) {
Connection conn = getConnection();
PreparedStatement stat = null;
List<Category> list = new ArrayList<Category>();
try {
stat = conn.prepareStatement(sql);
if (params != null) {
for (int i = 0; i < params.length; i++) {
// stat.setString(i, params[i]);
stat.setObject(i + 1, params[i]);
}
}
ResultSet rs = stat.executeQuery();
while (rs.next()) {
Category category = new Category();
category.setId(rs.getInt("id"));
category.setName(rs.getString("name"));
category.setState(rs.getString("state"));
list.add(category);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if (stat != null)
stat.close();
if (conn != null)
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return list;
}
public List<News> listNews(String sql, Object... params) {
Connection conn = getConnection();
PreparedStatement stat = null;
List<News> list = new ArrayList<News>();
try {
stat = conn.prepareStatement(sql);
if (params != null) {
for (int i = 0; i < params.length; i++) {
// stat.setString(i, params[i]);
stat.setObject(i + 1, params[i]);
}
}
ResultSet rs = stat.executeQuery();
while (rs.next()) {
/**
* CREATE TABLE `news` ( `id` int(11) NOT NULL AUTO_INCREMENT,
* `title` varchar(100) NOT NULL, `categoryid` int(11) DEFAULT
* NULL, `publisher` int(11) DEFAULT NULL, `pbdeptid` int(11)
* DEFAULT NULL, `pbdate` datetime DEFAULT NULL, `reviewer`
* int(11) DEFAULT NULL, `redate` datetime DEFAULT NULL,
* `clicks` int(11) NOT NULL DEFAULT '0', `content` text,
* PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8
*/
News news = new News();
news.setCategoryid(rs.getInt("categoryid"));
news.setClicks(rs.getInt("clicks"));
news.setContent(rs.getString("content"));
news.setId(rs.getInt("id"));
news.setPbdate(rs.getDate("pbdate"));
news.setPbdeptid(rs.getInt("pbdeptid"));
news.setPublisher(rs.getInt("publisher"));
news.setRedate(rs.getDate("redate"));
news.setReviewer(rs.getInt("reviewer"));
news.setTitle(rs.getString("title"));
list.add(news);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if (stat != null)
stat.close();
if (conn != null)
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return list;
}
public List<Users> listUsers(String sql, Object... params) {
Connection conn = getConnection();
PreparedStatement stat = null;
List<Users> list = new ArrayList<Users>();
try {
stat = conn.prepareStatement(sql);
if (params != null) {
for (int i = 0; i < params.length; i++) {
// stat.setString(i, params[i]);
stat.setObject(i + 1, params[i]);
}
}
ResultSet rs = stat.executeQuery();
while (rs.next()) {
Users users = new Users();
/**
* CREATE TABLE `users` ( `id` int(11) NOT NULL AUTO_INCREMENT,
* `username` varchar(20) NOT NULL, `account` varchar(20) NOT
* NULL, `password` varchar(10) NOT NULL, `email` varchar(50)
* DEFAULT NULL, `level` varchar(10) DEFAULT NULL, `deptid`
* int(11) NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT
* CHARSET=utf8
*/
users.setAccount(rs.getString("account"));
users.setDeptid(rs.getInt("deptid"));
users.setEmail(rs.getString("email"));
users.setId(rs.getInt("id"));
users.setLevel(rs.getString("level"));
users.setPassword(rs.getString("password"));
users.setUsername(rs.getString("username"));
list.add(users);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if (stat != null)
stat.close();
if (conn != null)
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return list;
}
public List<Dept> listDept(String sql, Object... params) {
Connection conn = getConnection();
PreparedStatement stat = null;
List<Dept> list = new ArrayList<Dept>();
try {
stat = conn.prepareStatement(sql);
if (params != null) {
for (int i = 0; i < params.length; i++) {
// stat.setString(i, params[i]);
stat.setObject(i + 1, params[i]);
}
}
ResultSet rs = stat.executeQuery();
while (rs.next()) {
Dept dept = new Dept();
/**
* CREATE TABLE `dept` ( `id` int(11) NOT NULL AUTO_INCREMENT,
* `name` varchar(50) NOT NULL, `superdept` int(11) DEFAULT
* NULL, `level` varchar(20) DEFAULT NULL, `state` char(1)
* DEFAULT '1', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT
* CHARSET=utf8
*/
dept.setId(rs.getInt("id"));
dept.setName(rs.getString("name"));
dept.setLevel(rs.getString("level"));
dept.setState(rs.getString("state"));
dept.setSuperdept(rs.getInt("superdept"));
list.add(dept);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if (stat != null)
stat.close();
if (conn != null)
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return list;
}
public List<Comments> listComments(String sql, Object... params) {
Connection conn = getConnection();
PreparedStatement stat = null;
List<Comments> list = new ArrayList<Comments>();
try {
stat = conn.prepareStatement(sql);
if (params != null) {
for (int i = 0; i < params.length; i++) {
// stat.setString(i, params[i]);
stat.setObject(i + 1, params[i]);
}
}
ResultSet rs = stat.executeQuery();
while (rs.next()) {
Comments comments = new Comments();
/**
* CREATE TABLE `comments` ( `id` int(11) NOT NULL
* AUTO_INCREMENT, `commentator` varchar(20) NOT NULL, `newsid`
* int(11) DEFAULT NULL, `commdate` datetime NOT NULL, `cotent`
* text NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT
* CHARSET=utf8
*/
comments.setCommdate(rs.getDate("commdate"));
comments.setCommentator(rs.getString("commentator"));
comments.setCotent(rs.getString("cotent"));
comments.setId(rs.getInt("id"));
comments.setNewsid(rs.getInt("newsid"));
list.add(comments);
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
try {
if (stat != null)
stat.close();
if (conn != null)
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return list;
}
}
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