【Java开源代码栏目提醒】:网学会员为需要Java开源代码的朋友们搜集整理了determine.java相关资料,希望对各位网友有所帮助!
package com.course;
import java.sql.*;
public class determine{
//根据教师ID查询班级和课程信息
public ResultSet getClass(String tea_id){
String sql="select classes.id,course.name "+
"from classes,course "+
"where course.id=classes.cour_id "+
"and classes.tea_id='"+tea_id+"' ";
sqlBean sqlbean = new sqlBean();
ResultSet rs = sqlbean.executeQuery(sql);
return rs;
}
//根据班级ID查询学生的具体信息
public ResultSet getStudents(String class_id){
String sql="select student.id,name ,department,sex,mark,e_mail,tel "+
"from student,enrol,classes "+
"where student.id=enrol.stu_id "+
"and enrol.accept='0' "+
"and classes.id=enrol.class_id "+
"and classes.id='"+class_id+"' ";
sqlBean sqlbean = new sqlBean();
ResultSet rs = sqlbean.executeQuery(sql);
return rs;
}
public ResultSet getStudents2(String class_id){
String sql="select student.id,name ,department,sex,mark,e_mail,tel "+
"from student,enrol,classes "+
"where student.id=enrol.stu_id "+
"and enrol.accept='1' "+
"and enrol.score='0' "+
"and classes.id=enrol.class_id "+
"and classes.id='"+class_id+"' ";
sqlBean sqlbean = new sqlBean();
ResultSet rs = sqlbean.executeQuery(sql);
return rs;
}
//根据学生ID和班级ID,进行数据库更新操作,用来更改标识位,表示学生选课成功
public int enrol(String stu_id,String class_id){
int num=0;
String sql="update enrol set accept=1 "+
"where stu_id='"+stu_id+"' "+
"and class_id='"+class_id+"' ";
sqlBean db = new sqlBean();
num=db.executeInsert(sql);
return num;
}
//给选课的学生打分
public int marking(String stu_id,String class_id,String score){
int num=0;
String sql="update enrol "+
"set score='"+score+"' "+
"where stu_id='"+stu_id+"' "+
"and class_id='"+class_id+"' ";
sqlBean db = new sqlBean();
num=db.executeInsert(sql);
return num;
}
//修改学生成绩
public int addMark(String stu_id,String class_id){
int num=0;
String sql="update student "+
"set student.mark=student.mark+course.mark "+
"from student,course,classes "+
"where student.id='"+stu_id+"' "+
"and course.id=classes.cour_id "+
"and classes.id='"+class_id+"' ";
sqlBean db = new sqlBean();
num=db.executeInsert(sql);
return num;
}
}