Java 有一個員工類,一個項目組類,用ArrayList怎么弄,要求完成添加查詢刪除.控制臺輸出就行.

Employee employee1 = new

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Employee();

List employees = new ArrayList();

// add employee

employees.add(employee1);

// delete employee

employees.remove(employee1);

// search employee

for each ( emp : employee){

if (emp.name.equals("Ken")){

print("cool");

}

}

JAVA員工管理小程序

Employee類:

public class Employee {

private int id;

private String name;

private int age;

private String email;

public int getId() {

return id;

}

public void setId(int id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public String getEmail() {

return email;

}

public void setEmail(String email) {

this.email = email;

}

}

Manager類:

import java.util.ArrayList;

import java.util.List;

public class Manager {

public static ListEmployee employees = new ArrayListEmployee();

public static void addEmployee(Employee employee){

employees.add(employee);

}

public static void deleteEmployee(Employee employee){

employees.remove(employee);

}

public static void updateEmployee(Employee employee){

int len = employees.size();

for(int i=0;ilen;i++){

Employee e = employees.get(i);

if(e.getId() == employee.getId()){

deleteEmployee(e);

addEmployee(employee);

}

}

}

public static Employee selectEmployeeById(int id){

int len = employees.size();

if(len!=0){

Employee emp = new Employee();

for(int i=0;ilen;i++){

Employee e = employees.get(i);

if(e.getId() == id){

emp = e;

}

}

return emp;

}else{

return null;

}

}

public static Employee selectEmployeeByName(String name){

int len = employees.size();

if(len!=0){

Employee emp = new Employee();

for(int i=0;ilen;i++){

Employee e = employees.get(i);

if(e.getName().equals(name)){

emp = e;

}

}

return emp;

}else{

return null;

}

}

public static void printEmployees(){

int len = employees.size();

if(len != 0){

for(int i=0;ilen;i++){

System.out.println(employees.get(i).getId()+":\t"+

employees.get(i).getName()+"\t"+

employees.get(i).getAge()+"\t"+

employees.get(i).getEmail());

}

}else{

System.out.println("無員工");

}

}

}

測試EmpManaTest類：

public class EmpManaTest {

public static void main(String[] args) {

Employee e = new Employee();

e.setId(1);

e.setName("zz");

e.setAge(20);

e.setEmail("zz@163.com");

Manager.addEmployee(e);

Employee e2 = new Employee();

e2.setId(2);

e2.setName("scof");

e2.setAge(18);

e2.setEmail("scofield@mail.com");

Manager.addEmployee(e2);

System.out.println("添加員工后：");

Manager.printEmployees();

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

Employee emp = new Employee();

emp.setId(1);

emp.setName("virus");

emp.setAge(30);

emp.setEmail("virus@163.com");

Manager.updateEmployee(emp);

System.out.println("修改員工后：");

Manager.printEmployees();

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

System.out.println("查詢員工ByID：");

Employee empSelectId = Manager.selectEmployeeById(1);

System.out.println(empSelectId.getName());

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

System.out.println("查詢員工ByName：");

Employee empSelectName = Manager.selectEmployeeByName("virus");

System.out.println(empSelectName.getEmail());

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

System.out.println("刪除一個員工后：");

Manager.deleteEmployee(emp);

Manager.printEmployees();

}

}

這個是不是你想要的...........

利用java代碼,編寫JDBC連接數(shù)據(jù)庫新增員工信息的步驟. 員工信息表:t_emp(id int？

第一步：新建數(shù)據(jù)庫

連接的是本地localhost，新建一個新的數(shù)據(jù)庫名是jdbctest

然后建表t_emp

不會的話可通過執(zhí)行下方的sql語句建表

CREATE TABLE `t_emp` (

`id` int(11) NOT NULL AUTO_INCREMENT,

`name` varchar(255) DEFAULT NULL,

`salary` double DEFAULT NULL,

PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

第二步：新建java項目

新建完以后添加mysql驅(qū)動的jar包，jar包自己下載

在項目上右鍵鼠標(biāo)屬性，然后

添加jar包，我這里已經(jīng)加載過了

第三步：編寫代碼

package com.gf;

import java.sql.DriverManager;

import java.sql.SQLException;

import com.mysql.jdbc.Connection;

import com.mysql.jdbc.Statement;

public class Test {

public static void main(String[] args) throws Exception {

int flag=0;

//1.加載驅(qū)動

Class.forName("com.mysql.jdbc.Driver");

//2.獲取連接

Connection conn=(Connection) DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/jdbctest?user=rootpassword=123456useUnicode=truecharacterEncoding=UTF-8");

//3.創(chuàng)建statement

Statement sm=(Statement) conn.createStatement();

//4.執(zhí)行sql語句

flag=sm.executeUpdate("insert into t_emp(name,salary) values('菲菲',34.9)");

if(flag!=0) {

System.out.println("員工信息增加成功");

}else {

System.out.println("添加失敗");

}

}

}

注意點：

---------------------------------------------------------------------------------

DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/jdbctest?user=rootpassword=123456useUnicode=truecharacterEncoding=UTF-8");

這里需要修改自己本機(jī)的連接信息，不然會出現(xiàn)連接失敗

最后的執(zhí)行結(jié)果

java eclipse3.2

從無到有這么編寫比較好。我老師給了我一堆東西。叫我往里面添加。我現(xiàn)在都弄不明白里面哪里有錯。eclipse太高級了太難學(xué)了。

求一段簡單的JAVA代碼 要求員工工資管理系統(tǒng)的一個增刪改查代碼，謝謝了

對數(shù)據(jù)庫進(jìn)行增刪改查？

以下是 sql server 2013+java.實現(xiàn)的是對MSC對象的增刪改查.

需要下載連接驅(qū)動程序：com.microsoft.sqlserver.jdbc.SQLServerDriver

網(wǎng)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"; //加載JDBC驅(qū)動

String dbURL = "jdbc:sqlserver://localhost:1433; DatabaseName=gsm"; //連接服務(wù)器和數(shù)據(jù)庫sample

String userName = "sa"; //默認(rèn)用戶名

String userPwd = "123"; //密碼

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("刪除表格MSC信息中 ID = "+MscID+"的記錄");

try {

pst = con.prepareStatement(sql);

pst.execute();

pst.close();

con.close();

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

System.out.println("記錄刪除失?。。?！");

}

System.out.println("記錄刪除成功?。?！\n");

}

public void insert(MSC msc){

Connection con = getConnection();

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

PreparedStatement pst;

System.out.println("插入一條記錄");

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?。。?！");

}

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("修改一條記錄");

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?。。?！");

}

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", "聯(lián)想");

sql.printUserInfo();

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

sql.printUserInfo();

}

}

使用Java的框架類實現(xiàn)員工信息的增刪改！

傳不上去。文字太多。

我把代碼寫到博客上了，你到博客看吧。

jsp+servlet

當(dāng)前名稱：增加刪除員工java代碼,增加刪除員工java代碼的方法
文章來源：http://chinadenli.net/article12/heiddc.html

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