java工资模块代码 java工资管理程序设计

求java大神帮我详细注释下下面这段代码，是model层工资模块里复制出来的

该函数作用是,保留两位小数,我觉得肯定是你们搞得好耍的.

public String getJbx() {

String str=""+jb;//jb 工资比如4321.2元

System.out.println("-----------  "+str);

int i = str.lastIndexOf(".");//找出小数点在字符串中的下标

System.out.println("!!!!!!!!!!!!!!!!  "+i);

String newstr = str.substring(i+1);//剪切出小数点之后的数字 newstr=2

System.out.println("@@@@@@@@@@@@@@@@@@@  "+newstr);

if(newstr.length()==1){//判断小数点后有几位小数,如果只有一位小数,则补零

str+="0";

}

return str;//最后这里返回 4321.20

}

求一段简单的JAVA代码 要求员工工资管理系统的一个增删改查代码，谢谢了

对数据库进行增删改查？

以下是 sql server 2013+java.实现java工资模块代码的是对MSC对象java工资模块代码的增删改查.

需要下载连接驱动程序java工资模块代码：com.microsoft.sqlserver.jdbc.SQLServerDriver

网上搜一下就行

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.PreparedStatement;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

class MSC

{

public String MscID;

public String MscName;

public String MscCompany;

public float MscLongitude;

public float MscLatitude;

public float MscAltitude;

public MSC(String MscID, String MscName, String MscCompany,

float MscLongitude, float MscLatitude,float MscAltitude){

this.MscID = MscID;

this.MscName = MscName;

this.MscCompany = MscCompany;

this.MscLongitude =MscLongitude;

this.MscLatitude = MscLatitude;

this.MscAltitude = MscAltitude;

}

}

public class sqlserverjdbc {

public Connection getConnection(){

String driverName = "com.microsoft.sqlserver.jdbc.SQLServerDriver"; //加载JDBC驱动

String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=gsm"; //连接服务器和数据库sample

String userName = "sa"; //默认用户名

String userPwd = "123"; //密码

Connection dbConn = null;

try {

Class.forName(driverName);

dbConn =DriverManager.getConnection(dbURL, userName, userPwd);

} catch (Exception e) {

e.printStackTrace();

}

return dbConn;

}

public void printUserInfo(){

Connection con = getConnection();

Statement sta = null;

ResultSet rs = null;

System.out.println("打印表格MSC信息");

try {

sta = con.createStatement();

rs = sta.executeQuery("select * from MSC信息");

System.out.println("MscID\tMscName\tMscCompany\tMscLongitude\tMscLatitude\tMscAltitude");

while(rs.next()){

System.out.println(rs.getString("MscID")+"\t"+

rs.getString("MscName")+"\t"+

rs.getString("MscCompany")+"\t"+

rs.getFloat("MscLongitude")+"\t"+

rs.getFloat("MscLatitude")+"\t"+

rs.getFloat("MscAltitude"));

}

con.close();

sta.close();

rs.close();

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

System.out.println("打印完成\n");

}

public void delete(String MscID){

Connection con = getConnection();

String sql = "delete from MSC信息 where MscID = " + MscID;

PreparedStatement pst;

System.out.println("删除表格MSC信息中 ID = "+MscID+"的记录");

try {

pst = con.prepareStatement(sql);

pst.execute();

pst.close();

con.close();

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

System.out.println("记录删除失败java工资模块代码！！！");

}

System.out.println("记录删除成功！！！\n");

}

public void insert(MSC msc){

Connection con = getConnection();

String sql = "insert into MSC信息 values(?,?,?,?,?,?)";

PreparedStatement pst;

System.out.println("插入一条记录");

try {

pst = con.prepareStatement(sql);

pst.setString(1, msc.MscID);

pst.setString(2, msc.MscName);

pst.setString(3, msc.MscCompany);

pst.setFloat(4, msc.MscLongitude);

pst.setFloat(5, msc.MscLatitude);

pst.setFloat(6, msc.MscAltitude);

pst.execute();

pst.close();

con.close();

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

System.out.println("插入失败！！！");

}

System.out.println("插入成功！！！\n");

}

//更新MscID的MscName

public void updateMscName(String MscID, String MscName){

Connection con = getConnection();

String sql = "update MSC信息 set MscName = ? where MscID = ?";

PreparedStatement pst;

System.out.println("修改一条记录");

try {

pst = con.prepareStatement(sql);

pst.setString(1, MscName);

pst.setString(2, MscID);

pst.execute();

pst.close();

con.close();

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

System.out.println("修改失败！！！");

}

System.out.println("修改成功！！！\n");

}

public static void main(String args[]){

sqlserverjdbc sql = new sqlserverjdbc();

sql.printUserInfo();

sql.delete("1111");

sql.printUserInfo();

sql.updateMscName("5215", "联想");

sql.printUserInfo();

sql.insert(new MSC("1111", "中兴" ," 中兴", (float)12.2, (float)3.4,(float)45.5));

sql.printUserInfo();

}

}

java计算工资

person类：

public abstract class Person {

public double pay; // 总工资

public int hour; // 课时

public double countPay(int hour) {

return pay;

}

}

助教类：

public class Assistant extends Person {

public final double BASE_PAY = 800; // 基本工资

public final double HOUR_PAY = 25; // 每课时的费用

public double countPay(int hour) {

pay = BASE_PAY + hour * HOUR_PAY;

return pay;

}

}

讲师类：

public class Instructor extends Person {

public final double BASE_PAY = 1000; // 基本工资

public final double HOUR_PAY = 35; // 每课时的费用

public double countPay(int hour) {

pay = BASE_PAY + hour * HOUR_PAY;

return pay;

}

}

副教授类：

public class AssistantProfesson extends Person {

public final double BASE_PAY = 1200; // 基本工资

public final double HOUR_PAY = 40; // 每课时的费用

public double countPay(int hour) {

pay = BASE_PAY + hour * HOUR_PAY;

return pay;

}

}

教授类：

public class Professor extends Person {

public final double BASE_PAY = 1400; // 基本工资

public final double HOUR_PAY = 50; // 每课时的费用

public double countPay(int hour) {

pay = BASE_PAY + hour * HOUR_PAY;

return pay;

}

}

测试类：

import java.io.BufferedReader;

import java.io.InputStreamReader;

public class Test {

public static void main(String[] args) {

System.out.println("人员类型如下：");

System.out.println("1 = 助教\r\n2 = 讲师\r\n3 = 副教授\r\n4 = 教授");

System.out.print("请选择：");

BufferedReader personType = new BufferedReader(new InputStreamReader(

System.in));

String type = null;

int hour = 0;

try {

type = personType.readLine();

} catch (Exception e) {

e.printStackTrace();

}

if (type.matches("[1-4]{1}")) {

switch (Integer.valueOf(type)) {

case 1:

hour = getHour();

if(hour == 0){return;}

Person p1 = new Assistant();

double pay1 = p1.countPay(hour);

System.out.println("助教工作" + hour + "课时的工资为：" + pay1);

break;

case 2:

hour = getHour();

if(hour == 0){return;}

Person p2 = new Instructor();

double pay2 = p2.countPay(hour);

System.out.println("讲师工作" + hour + "课时的工资为：" + pay2);

break;

case 3:

hour = getHour();

if(hour == 0){return;}

Person p3 = new AssistantProfesson();

double pay3 = p3.countPay(hour);

System.out.println("副教授工作" + hour + "课时的工资为：" + pay3);

break;

case 4:

hour = getHour();

if(hour == 0){return;}

Person p4 = new Professor();

double pay4 = p4.countPay(hour);

System.out.println("教授工作" + hour + "课时的工资为：" + pay4);

break;

}

} else {

System.out.println("输入数据错误！程序提前推出！");

return;

}

}

public static int getHour() {

System.out.print("请输入工作时间：");

BufferedReader hours = new BufferedReader(new InputStreamReader(

System.in));

String strHour = null;

int hour = 0;

try {

strHour = hours.readLine();

} catch (Exception e) {

e.printStackTrace();

}

if (strHour.matches("^[0-9]+?")) {

hour = Integer.parseInt(strHour);

} else {

System.out.println("输入参数不正确！程序提前推出！");

}

return hour;

}

}

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