【新手提问】关于InputStreamReader控制台输入出现?号的有关问题

import java.sql.*;import java.io.*;public class JDBC {    Connection con;    Statement st;    InputStreamReader isr = new InputStreamReader(System.in);    BufferedReader br = new BufferedReader(isr);    public JDBC(){        try{            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");            System.out.println ("正在连接数据库.....");            con = DriverManager.getConnection("jdbc:odbc:MyODBC","sa","");            st = con.createStatement();            System.out.println ("数据库连接成功.");        }catch(ClassNotFoundException cnfe){            cnfe.printStackTrace();        }catch(SQLException sql){            sql.printStackTrace();        }    }    public void addbase() throws Exception{        System.out.println ("请输入ID:");        int id = Integer.parseInt(br.readLine());        System.out.println ("请输入姓名:");        String name = br.readLine();        System.out.println ("请输入年龄:");        int age = Integer.parseInt(br.readLine());        System.out.println ("请输入性别:");        String sex = br.readLine();        System.out.println (id+" "+name+" "+age+" "+sex);//输入英文或数字的话String可以正确显示,但是中文就 成了问号,比如:我输入"张三",输出的是"张",输入一个中文,就是问号      PreparedStatement ps = con.prepareStatement("insert into job values(?,?,?,?)");        ps.setInt(1,id);        ps.setString(2,name);        ps.setInt(3,age);        ps.setString(4,sex);        ps.executeUpdate();    }        public void deletebase() throws Exception{        System.out.println ("请输入要删除的ID:");        int id = Integer.parseInt(br.readLine());        PreparedStatement ps = con.prepareStatement("delete from job where id = ?");        ps.setInt(1,id);        ps.executeUpdate();    }        public void selectbase() throws Exception{        ResultSet rs = st.executeQuery("select * from job");        while(rs.next()){            System.out.println ("学号:"+rs.getInt("id"));            System.out.println ("姓名:"+rs.getString("name"));            System.out.println ("年龄:"+rs.getInt("age"));            System.out.println ("性别:"+rs.getString("sex"));            System.out.println ("*****************************");        }    }    public void closes() throws Exception{        br.close();        isr.close();        con.close();    }    public static void main(String[] args) {        JDBC tmp = new JDBC();        try{            //tmp.addbase();            //tmp.deletebase();            tmp.selectbase();            tmp.closes();        }catch(ClassNotFoundException cnfe){            cnfe.printStackTrace();        }catch(SQLException sql){            sql.printStackTrace();        }catch(Exception ep){            ep.printStackTrace();        }    }}

package test.input;import java.io.BufferedReader;import java.io.InputStreamReader;public class TestSystemIn {  InputStreamReader isr = new InputStreamReader(System.in);  BufferedReader br = new BufferedReader(isr);  public void addbase() throws Exception {    System.out.println("请输入ID:");    int id = Integer.parseInt(br.readLine());    System.out.println("请输入姓名:");    String name = br.readLine();    System.out.println("请输入年龄:");    int age = Integer.parseInt(br.readLine());    System.out.println("请输入性别:");    String sex = br.readLine();    System.out.println(id + " " + name + " " + age + " " + sex);// 我这里输出正常  }  public static void main(String[] args) throws Exception {    TestSystemIn o = new TestSystemIn();    o.addbase();  }}