JDBC连接MySQL数据库

public class DBJavaBean{
private String driverName="com.mysql.jdbc.Driver";
private String url="jabc:mysql://localhost:3306/student?useUnicode=true&characterEncoding=gbk";
private String user="root";
private Stirng password="root";
private Connection con=null;
private Statement st=null;
private ResultSet rs=null;
public String getDriverName(){
return driverName;
}
public void setDriverName(String driverName){
this.driverName=driverName;
}
public String getUrl(){
return url;
}
public void setUrl(String url){
this.url=url;
}
public String getUser(){
return user;
}
public void setUser(String user) {
this.user = user;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Connection getCon() {
return con;
}
public void setCon(Connection con) {
this.con = con;
}
public Statement getStmt() {
return stmt;
}
public void setStmt(Statement stmt) {
this.stmt = stmt;
}
public ResultSet getRs() {
return rs;
}
public void setRs(ResultSet rs) {
this.rs = rs;
}

//完成数据库连接
public Statement getStatement() {
try {
Class.forName(getDriverName());
con = DriverManager.getConnection(getUrl(), getUser(), getPassword());
return con.createStatement();
} catch (Exception e) {
e.printStackTrace();
message("无法完成数据库的连接或无法返回容器，请检查getStatement()方法！！！");
return null;
}
}

//添加学生信息方法，注意sql语句写法
public boolean addStu(String sID,String sName,String sSex,String sAge) {
try {
String sql = "insert into stuinfo"+"(SID,SName,SSex,SAge)"+"values("+"'"+sID+"'"+","+"'"+sName+"'"+","+"'"+sSex+"'"+","+"'"+sAge+"'"+")";
stmt = getStatement();
int row = stmt.executeUpdate(sql);
if (row==1) {
stmt.close();
con.close();
return true;
}else{
stmt.close();
con.close();
return false;
}
} catch (Exception e) {
e.printStackTrace();
message("无法添加学生信息，请检查addStu()方法！！！");
return false;
}
}

//查询所有学生信息，并返回rs
public ResultSet selectStu() {

try {
String sql="select * from stuinfo";
stmt=getStatement();
return stmt.executeQuery(sql);
} catch (Exception e) {
e.printStackTrace();
message("无法查询学生信息，请检查selectStu()方法！！！");
return null;
}
}

//查询要修改的学生信息
public ResultSet selectUpdateStu(String sID){
try {
String sql="select * from stuinfo where SID='"+sID+"'";
stmt=getStatement();
return stmt.executeQuery(sql);
} catch (Exception e) {
e.printStackTrace();
message("无法查询到要修改学生的信息，请检查输入的学号！！！");
return null;
}
}

//修改学生信息
public boolean updateStu(String sID,String sName,String sSex,String sAge) {
try {
String sql = "update stuinfo set SName='"+sName+"',SSex='"+sSex+"',SAge='"+sAge+"' where SID='"+sID+"'";
stmt=getStatement();
stmt.executeUpdate(sql);
return true;
} catch (Exception e) {
e.printStackTrace();
message("无法修改学生的信息请检查updateStu()方法！！！");
return false;
}
}

//查询要删除的学生信息
public ResultSet lookDelStu() {
try {
String sql = "select * from stuinfo";
stmt = getStatement();
return stmt.executeQuery(sql);
} catch (Exception e) {
e.printStackTrace();
message("无法查询到要删除学生的信息，请检查lookDelStu()方法！！！");
return null;
}
}

//删除学生信息
public boolean delStu(String sID) {
try {
String sql = "delete from stuinfo where SID='"+sID+"'";
stmt = getStatement();
stmt.executeUpdate(sql);
return true;
} catch (SQLException e) {
e.printStackTrace();
message("无法删除学生的信息，请检查delStu()方法！！！");
return false;
}
}

//一个带参数的提示框，用于排除错误
private void message(String msg) {

int type = JOptionPane.YES_NO_OPTION;
String title="信息提示";
JOptionPane.showMessageDialog(null, msg, title, type);

}