userDaoClass=com.ceit.dao.impl
#userDaoClass=cn.itcast.jdbc.dao.impl.UserDaoHibernateImpl
key=value
key1=value1
package com.ceit.dao;
import java.sql.SQLException;
import com.ceit.domain.student;
public interface UserDao {
public void addUser(student stu) throws SQLException;
public student findUser(String loginName,String password) throws DaoException;
public void update(student stu) throws DaoException;
public void delete(student stu) throws DaoException;
}
package com.ceit.dao.impl;
import java.sql.ResultSet;
import java.sql.SQLException;
import com.ceit.dao.DaoException;
import com.ceit.dao.JdbcUtils;
import com.ceit.dao.UserDao;
import com.ceit.domain.student;
import com.mysql.jdbc.*;
public class UserDaoImpl implements UserDao {
@Override
public void addUser(student stu) throws SQLException {
// TODO Auto-generated method stub
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
try{
conn = (Connection) JdbcUtils.getConnection();
String sql = "insert into student(name,school,phone) values(?,?,?)";
ps = (PreparedStatement) conn.prepareStatement(sql);
ps.setString(1,stu.getName());
ps.setString(2, stu.getSchool());
ps.setString(3, stu.getPhone());
ps.executeUpdate();
}
catch(SQLException e){
e.printStackTrace();
throw e;
}finally{
JdbcUtils.free(rs,ps,conn);
}
}
@Override
public student findUser(String loginName,String password) throws DaoException {
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs= null;
student stu = new student();
try{
conn = (Connection) JdbcUtils.getConnection();
String sql = "select id,name,school,phone,sex,project,courseid from student where name=?";
ps = (PreparedStatement) conn.prepareStatement(sql);
ps.setString(1,loginName);
rs = ps.executeQuery();
while(rs.next()){
mappingStu(rs, stu);
}
}
catch(SQLException e){
throw new DaoException(e.getMessage(),e);
}finally{
JdbcUtils.free(rs,ps,conn);
}
return stu;
}
public student getstudent(int stuId) throws DaoException{
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs= null;
student stu = new student();
try{
conn = (Connection) JdbcUtils.getConnection();
String sql = "select id,name,school,phone,sex,project,courseid from student where id=?";
ps = (PreparedStatement) conn.prepareStatement(sql);
ps.setLong(1,stuId);
rs = ps.executeQuery();
while(rs.next()){
mappingStu(rs, stu);
}
}
catch(SQLException e){
throw new DaoException(e.getMessage(),e);
}finally{
JdbcUtils.free(rs,ps,conn);
}
return stu;
}
private void mappingStu(ResultSet rs, student stu) throws SQLException {
stu.setId(rs.getInt("id"));
stu.setName(rs.getString("name"));
stu.setSchool(rs.getString("school"));
stu.setPhone(rs.getString("phone"));
}
@Override
public void update(student stu) throws DaoException {
// TODO Auto-generated method stub
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs= null;
try{
conn = (Connection) JdbcUtils.getConnection();
String sql = "update student set name=?,school=?,phone=?,sex=? where id=?";
ps = (PreparedStatement) conn.prepareStatement(sql);
ps.setString(1,stu.getName());
ps.setString(2,stu.getSchool());
ps.setString(3,stu.getPhone());
ps.setString(4,stu.getSex());
ps.executeUpdate();
}catch(SQLException e){
throw new DaoException(e.getMessage(),e);
}finally{
JdbcUtils.free(rs,ps,conn);
}
}
@Override
public void delete(student stu) throws DaoException {
// TODO Auto-generated method stub
Connection conn = null;
Statement st = null;
ResultSet rs = null;
try{
conn = (Connection) JdbcUtils.getConnection();
st = (Statement) conn.createStatement();
String sql = "delete from user where id=" + stu.getId();
st.executeUpdate(sql);
}
catch(SQLException e){
throw new DaoException(e.getMessage(),e);
}finally{
JdbcUtils.free(rs,st,conn);
}
}
}
package com.ceit.domain;
import java.util.ArrayList;
import com.ceit.project.Project;
public class student {
private String name;
private long id;
private String sex;
private String school;
private String phone;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getSchool() {
return school;
}
public void setSchool(String school) {
this.school = school;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public ArrayList<Project> getMyProject() {
return myProject;
}
public void setMyProject(ArrayList<Project> myProject) {
this.myProject = myProject;
}
public ArrayList<Course> getMyCourse() {
return myCourse;
}
public void setMyCourse(ArrayList<Course> myCourse) {
this.myCourse = myCourse;
}
private ArrayList<Project> myProject= new ArrayList<Project> ();
private ArrayList<Course> myCourse= new ArrayList<Course> ();
}
package com.ceit.dao;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Properties;
public class DaoFactory {
private static UserDao userDao = null;//置上 否则会为空
private static DaoFactory instance = new DaoFactory();
private DaoFactory() {
try {
Properties prop = new Properties();
InputStream inStream = DaoFactory.class.getClassLoader()
.getResourceAsStream("daoconfig.properties"); //类加载器
prop.load(inStream);
String userDaoClass = prop.getProperty("userDaoClass");
Class clazz = Class.forName(userDaoClass);
userDao = (UserDao) clazz.newInstance();
} catch (Throwable e) {
throw new ExceptionInInitializerError(e);
}
}
public static DaoFactory getInstance() {
return instance;
}
public UserDao getUserDao() {
return userDao;
}
}
package com.ceit.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class JdbcUtils {
private static String user = "root";
private static String password = "root";
//private static String password = "541065";
private static String url = "jdbc:mysql://localhost:3306/cooventure?useUnicode=true&characterEncoding=UTF-8";
//private static String url = "jdbc:mysql://210.30.208.152:3306/teacherinfo?useUnicode=true&characterEncoding=UTF-8";
static {
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException e) {
throw new ExceptionInInitializerError(e);
}
}
public static Connection getConnection() throws SQLException {
Connection conn=DriverManager.getConnection(url, user, password);
return conn;
}
public static void executeSql(String sql){
Statement stmt = null;
Connection conn = null;
try{
conn = getConnection();
stmt = conn.createStatement();
stmt.execute(sql);
}catch(SQLException e){
e.printStackTrace();
}finally{
try{
if(stmt != null)
stmt.close();
if(conn != null){
conn.close();
}
}catch(SQLException e){
e.printStackTrace();
}
}
}
public static void executeDeleteSql(String sql){
Statement stmt = null;
Connection conn = null;
try{
conn = getConnection();
stmt = conn.createStatement();
stmt.executeUpdate(sql);
}catch(SQLException e){
e.printStackTrace();
}finally{
try{
if(stmt != null)
stmt.close();
if(conn != null){
conn.close();
}
}catch(SQLException e){
e.printStackTrace();
}
}
}
public static List<Map<String,Object>> executeQuery(String sql,String[] params){
/*String []params = null;*/
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
try{
conn = getConnection();
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
/*ResultSetMetaData rsmd=rs.getMetaData();
int count=rsmd.getColumnCount();*/
/*while(rs.next()){
Map<String,Object> map = new HashMap<String,Object>();
for(int i=0;i<count;i++){
params[i] = rsmd.getColumnName(i);//把列名存入向量heads中
}
list.add(map);
}*/
while(rs.next()){
Map<String,Object> map = new HashMap<String,Object>();
for(int i=0;i<params.length;i++){
map.put(params[i]+"", rs.getString(params[i]));
}
list.add(map);
}
}catch(SQLException e){
e.printStackTrace();
}finally{
try{
if(rs != null)
rs.close();
if(stmt != null)
stmt.close();
if(conn != null)
conn.close();
}catch(SQLException e){
e.printStackTrace();
}
}
return list;
}
public static Connection beginSession(){
Connection conn = null;
try {
conn = getConnection();
conn.setAutoCommit(false);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
public static void executeSql(Connection conn,String sql){
Statement stmt = null;
try{
stmt = conn.createStatement();
stmt.execute(sql);
}catch(SQLException e){
e.printStackTrace();
}finally{
try{
if(stmt != null)
stmt.close();
}catch(SQLException e){
e.printStackTrace();
}
}
}
public static void free(ResultSet rs, Statement st, Connection conn) {
try {
if (rs != null)
rs.close();
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
if (st != null)
st.close();
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (conn != null)
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
}
