学生信息管理系统JAVASE版--第0阶段之CMD版--0.1.3 版
时间：2014-04-27 22:11:22
收藏：0
阅读：469
这个程序是一个有进步也有失败的程序
比如没有做好多表查询，也没有做好主类中的逻辑处理。总之又要去复习了。
改进：
1、使用第三工具dbutils对数据库操作部分进行了封装
2、把URL等变量改为属性文件的形式
代码：
MYSQL：
student表：
CREATE TABLE student(
stuId INT PRIMARY KEY AUTO_INCREMENT, -- 学生编号
stuName VARCHAR(20) NOT NULL DEFAULT ‘‘, -- 学生姓名
stuAge INT NOT NULL DEFAULT 0, -- 学生年龄
stuSex VARCHAR(5) NOT NULL DEFAULT ‘‘ -- 学生性别
)engine myisam charset utf8;studentscore表：
CREATE TABLE studentScore(
stuId INT NOT NULL, -- 学生编号
stuChinese DOUBLE NOT NULL DEFAULT 0.0, -- 学生中文成绩
stuMath DOUBLE NOT NULL DEFAULT 0.0, -- 学生数学成绩
stuEnglish DOUBLE NOT NULL DEFAULT 0.0, -- 学生英文成绩
CONSTRAINT fk_student FOREIGN KEY(stuId) REFERENCES student(stuId) -- 设置外键
)engine myisam charset utf8;
JAVA：
对象类：
Student（学生基本信息,com.laolang.domain.student）：
package com.laolang.domain;
// TODO: Auto-generated Javadoc
/**
* The Class Student.
*/
public class Student {
/**
* Instantiates a new student.
*/
public Student() {
super();
}
/**
* Instantiates a new student.
*
* @param stuId
* the stu id
* @param stuName
* the stu name
* @param stuAge
* the stu age
* @param stuSex
* the stu sex
*/
public Student(int stuId, String stuName, int stuAge, String stuSex) {
super();
this.stuId = stuId;
this.stuName = stuName;
this.stuAge = stuAge;
this.stuSex = stuSex;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "Student [stuId=" + stuId + ", stuName=" + stuName + ", stuAge="
+ stuAge + ", stuSex=" + stuSex + "]";
}
/**
* Gets the stu id.
*
* @return the stu id
*/
public int getStuId() {
return stuId;
}
/**
* Sets the stu id.
*
* @param stuId
* the new stu id
*/
public void setStuId(int stuId) {
this.stuId = stuId;
}
/**
* Gets the stu name.
*
* @return the stu name
*/
public String getStuName() {
return stuName;
}
/**
* Sets the stu name.
*
* @param stuName
* the new stu name
*/
public void setStuName(String stuName) {
this.stuName = stuName;
}
/**
* Gets the stu age.
*
* @return the stu age
*/
public int getStuAge() {
return stuAge;
}
/**
* Sets the stu age.
*
* @param stuAge
* the new stu age
*/
public void setStuAge(int stuAge) {
this.stuAge = stuAge;
}
/**
* Gets the stu sex.
*
* @return the stu sex
*/
public String getStuSex() {
return stuSex;
}
/**
* Sets the stu sex.
*
* @param stuSex
* the new stu sex
*/
public void setStuSex(String stuSex) {
this.stuSex = stuSex;
}
/** The stu id. */
private int stuId;
/** The stu name. */
private String stuName;
/** The stu age. */
private int stuAge;
/** The stu sex. */
private String stuSex;
}
StudentScore（学生成绩，com.laolang.domain.StudentScore）：
package com.laolang.domain;
// TODO: Auto-generated Javadoc
/**
* The Class studentScore.
*/
public class StudentScore {
/**
* Instantiates a new student score.
*/
public StudentScore() {
super();
}
/**
* Instantiates a new student score.
*
* @param stuId
* the stu id
* @param stuChinese
* the stu chinese
* @param stuMath
* the stu math
* @param stuEnglish
* the stu english
*/
public StudentScore(int stuId, double stuChinese, double stuMath,
double stuEnglish) {
super();
this.stuId = stuId;
this.stuChinese = stuChinese;
this.stuMath = stuMath;
this.stuEnglish = stuEnglish;
}
/*
* (non-Javadoc)
*
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "studentScore [stuId=" + stuId + ", stuChinese=" + stuChinese
+ ", stuMath=" + stuMath + ", stuEnglish=" + stuEnglish + "]";
}
/**
* Gets the stu id.
*
* @return the stu id
*/
public int getStuId() {
return stuId;
}
/**
* Sets the stu id.
*
* @param stuId
* the new stu id
*/
public void setStuId(int stuId) {
this.stuId = stuId;
}
/**
* Gets the stu chinese.
*
* @return the stu chinese
*/
public double getStuChinese() {
return stuChinese;
}
/**
* Sets the stu chinese.
*
* @param stuChinese
* the new stu chinese
*/
public void setStuChinese(double stuChinese) {
this.stuChinese = stuChinese;
}
/**
* Gets the stu math.
*
* @return the stu math
*/
public double getStuMath() {
return stuMath;
}
/**
* Sets the stu math.
*
* @param stuMath
* the new stu math
*/
public void setStuMath(double stuMath) {
this.stuMath = stuMath;
}
/**
* Gets the stu english.
*
* @return the stu english
*/
public double getStuEnglish() {
return stuEnglish;
}
/**
* Sets the stu english.
*
* @param stuEnglish
* the new stu english
*/
public void setStuEnglish(double stuEnglish) {
this.stuEnglish = stuEnglish;
}
/** The stu id. */
private int stuId;
/** The stu chinese. */
private double stuChinese;
/** The stu math. */
private double stuMath;
/** The stu english. */
private double stuEnglish;
}
连接封装类
laolangDB（封装驱动连接和关闭,com.laolang.db.laolangDB）：
package com.laolang.db;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ResourceBundle;
// TODO: Auto-generated Javadoc
/**
* The Class laolangDB.
*/
public class laolangDB {
/** The url. */
private static String URL;
/** The username. */
private static String USERNAME;
/** The userpassword. */
private static String USERPASSWORD;
/** The driver. */
private static String DRIVER;
/** The rb. */
private static ResourceBundle rb = ResourceBundle
.getBundle("com.laolang.db.db-config");
/**
* 使用静态代码块加载驱动
*/
static {
URL = rb.getString("jdbc.url");
USERNAME = rb.getString("jdbc.username");
USERPASSWORD = rb.getString("jdbc.userpassword");
DRIVER = rb.getString("jdbc.driver");
try {
Class.forName(DRIVER);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 获得链接
*
* @return the connection
*/
public static Connection getConnection() {
Connection conn = null;
try {
conn = DriverManager.getConnection(URL, USERNAME, USERPASSWORD);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return conn;
}
/**
* 关闭链接
*
* @param rs
* the rs
* @param ps
* the ps
* @param conn
* the conn
*/
public static void closeConnection(ResultSet rs, Statement ps,
Connection conn) {
try {
if (null != rs)
rs.close();
if (null != ps)
ps.close();
if (null != conn)
conn.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
db-config.properties（连接属性文件，com.laolang.db.db-config.properties）：
jdbc.url=jdbc:mysql://localhost:3306/studentmanager_0.1.3
jdbc.username=root
jdbc.userpassword=123456
jdbc.driver=com.mysql.jdbc.Driver
DAO接口：
StudentDao（学生基本信息数据处理，com.laolang.dao.StudentDao）：
package com.laolang.dao;
import java.sql.SQLException;
import java.util.List;
import com.laolang.domain.Student;
// TODO: Auto-generated Javadoc
/**
* The Interface StudentDao.
*/
public interface StudentDao {
/**
* 插入学生基本信息
*
* @param stu
* the stu
* @throws SQLException
* the SQL exception
*/
public void insertStudent(Student stu) throws SQLException;
/**
* 删除学生基本信息
*
* @param stuId
* the stu id
* @throws SQLException
* the SQL exception
*/
public void deleteStudent(int stuId) throws SQLException;
/**
* 更新学生基本信息
*
* @param stu
* the stu
* @throws SQLException
* the SQL exception
*/
public void updateStudent(Student stu) throws SQLException;
/**
* S通过编号查询学生基本信息
*
* @param stuId
* the stu id
* @return the student
* @throws SQLException
* the SQL exception
*/
public Student selectStudentById(int stuId) throws SQLException;
/**
* 查询所有学生基本信息
*
* @return the list
* @throws SQLException
* the SQL exception
*/
public List<Student> selectStudentAll() throws SQLException;
}
StudentScoreDao（学生成绩处理接口，com.laolang.dao.StudentScoreDao）：
package com.laolang.dao;
import java.sql.SQLException;
public interface StudentScoreDao {
public String maxScore(StudentDao stuDao) throws SQLException;
public String stuScore( StudentDao stuDao, int stuId ) throws SQLException;
}
DAO实现：
StudentDaoImpl（学生基本信息处理实现，com.laolang.dao.impl.StudentDaoImpl）：
package com.laolang.dao.impl;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import com.laolang.dao.StudentDao;
import com.laolang.db.laolangDB;
import com.laolang.domain.Student;
// TODO: Auto-generated Javadoc
/**
* The Class StudentDaoImpl.
*/
public class StudentDaoImpl implements StudentDao {
/** The runner. */
private QueryRunner runner;
/**
* Instantiates a new student dao impl.
*/
public StudentDaoImpl() {
runner = new QueryRunner();
}
/*
* 插入学生基本信息
*
* @see com.laolang.dao.StudentDao#insertStudent(com.laolang.domain.Student)
*/
@Override
public void insertStudent(Student stu) throws SQLException {
String insertStudent = "insert into student( stuId, stuName, stuAge, stuSex ) values(?,?,?,?)";
runner.update(laolangDB.getConnection(), insertStudent, stu.getStuId(),
stu.getStuName(), stu.getStuAge(), stu.getStuSex());
}
/*
* 删除学生基本信息
*
* @see com.laolang.dao.StudentDao#deleteStudent(int)
*/
@Override
public void deleteStudent(int stuId) throws SQLException {
String deleteStudentById = "delete from student where stuId = ?";
runner.update(laolangDB.getConnection(), deleteStudentById, stuId);
}
/*
* 更新学生基本信息
*
* @see com.laolang.dao.StudentDao#updateStudent(com.laolang.domain.Student)
*/
@Override
public void updateStudent(Student stu) throws SQLException {
String updateStudent = "update student set stuName = ?, stuAge = ?, stuSex = ? where stuId = ?";
runner.update(laolangDB.getConnection(), updateStudent,
stu.getStuName(), stu.getStuAge(), stu.getStuSex(),
stu.getStuId());
}
/*
* 通过编号查询学生基本信息
*
* @see com.laolang.dao.StudentDao#selectStudentById(int)
*/
@Override
public Student selectStudentById(int stuId) throws SQLException {
Student stu = null;
String selectStudentById = "select stuName, stuAge, stuSex from student where stuId = ?";
stu = runner.query(laolangDB.getConnection(), selectStudentById,
new BeanHandler<Student>(Student.class), stuId);
stu.setStuId(stuId);
return stu;
}
/*
* 查询所有学生基本信息
*
* @see com.laolang.dao.StudentDao#selectStudentAll()
*/
@Override
public List<Student> selectStudentAll() throws SQLException {
String selectStudentAll = "select stuId, stuName, stuAge, stuSex from student";
List<Student> studentList = runner.query(laolangDB.getConnection(),
selectStudentAll, new BeanListHandler<Student>(Student.class));
return studentList;
}
}
StudentScoreDaoImpl（学生成绩处理实现【未写成】,com.laolang.dao.impl.StudentScoreDaoImpl）：
package com.laolang.dao.impl;
import java.sql.SQLException;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import com.laolang.dao.StudentDao;
import com.laolang.dao.StudentScoreDao;
import com.laolang.db.laolangDB;
import com.laolang.domain.Student;
import com.laolang.domain.StudentScore;
// TODO: Auto-generated Javadoc
/**
* The Class StudentScoreDaoImpl.
*/
public class StudentScoreDaoImpl implements StudentScoreDao {
/** The runner. */
private QueryRunner runner;
/**
* Instantiates a new student score dao impl.
*/
public StudentScoreDaoImpl(){
runner = new QueryRunner();
}
/* (non-Javadoc)
* @see com.laolang.dao.StudentScoreDao#maxScore(com.laolang.dao.StudentDao)
*/
@Override
public String maxScore(StudentDao stuDao) throws SQLException {
return null;
}
/* 根据学生编号查询学生的编号，姓名，和成绩
* @see com.laolang.dao.StudentScoreDao#stuScore(com.laolang.dao.StudentDao, int)
*/
@Override
public String stuScore(StudentDao stuDao, int stuId) throws SQLException {
Student stu = stuDao.selectStudentById(stuId);//根据编号查询学生基本信息
String selectStuSore = "select stuChinese, stuMath, stuEnglish from studentscore where stuId = ?";
StudentScore stuSc = runner.query(laolangDB.getConnection(), selectStuSore,
new BeanHandler<StudentScore>(StudentScore.class), stuId);
StringBuffer stuScore = new StringBuffer();
stuScore.append( stu.getStuId() );
stuScore.append( " ");
stuScore.append( stu.getStuName() );
stuScore.append( " ");
stuScore.append( stuSc.getStuChinese() );
stuScore.append( " ");
stuScore.append( stuSc.getStuMath() );
stuScore.append( " ");
stuScore.append( stuSc.getStuEnglish() );
return stuScore.toString();
}
}
启动类：
manager（只使用了一个输出所有学生基本信息，不过其它的，只要我写的，都是可以用的，com.laolang.test.manager）
package com.laolang.manager;
import java.sql.SQLException;
import java.util.List;
import java.util.Scanner;
import com.laolang.dao.StudentDao;
import com.laolang.dao.StudentScoreDao;
import com.laolang.dao.impl.StudentDaoImpl;
import com.laolang.dao.impl.StudentScoreDaoImpl;
import com.laolang.db.laolangDB;
import com.laolang.domain.Student;
public class manager {
public static void main(String[] args) {
StudentDao sDao = new StudentDaoImpl();
try {
List<Student> studentList= sDao.selectStudentAll();
for( Student stu : studentList ){
System.out.println(stu.toString());
}
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
测试效果：
评论（0）