//将界面数据与数据库书库数据进行比对
@Override
public int Compair(String username,String PassWord) {
Connection conn;
PreparedStatement ps = null;
String[] name = null;
String[] PWD = null;
PWD = new String[11];
name = new String[11];
name[0] = "1";PWD[0] = "1";
name[1] = "2";PWD[1] = "2";
name[2] = "3";PWD[2] = "3";
name[3] = "4";PWD[3] = "4";
name[4] = "5";PWD[4] = "5";
name[5] = "6";PWD[5] = "6";
name[6] = "7";PWD[6] = "7";
name[7] = "8";PWD[7] = "8";
name[8] = "9";PWD[8] = "9";
name[9] = "10";PWD[9] = "10";
try{
conn = DBUtil.getConnection();
String strSQl = "select UserName,PassWord from Adminmseager";
ps = conn.prepareStatement(strSQl);
ps.execute();//执行语句
ResultSet rs = ps.getResultSet();// 获得结果
while(rs.next()){
for (int i = 0; i < name.length; i++) {
//System.out.println("========="+rs.getString(1));
//System.out.println("========="+rs.getString(2));
if(rs.getString(1).equals(name[i])||rs.getString(2).equals(PWD[i])){
System.out.println("输入正确!");
return i + 1;
}if(!rs.getString(1).equals(name[i])){
System.out.println("请输入正确的管理员帐号!");
}if(!rs.getString(2).equals(PWD[i])){
System.out.println("请输入正确的登录密码!");
}
}
return -1;
}
}catch(Exception e){
e.printStackTrace();
}
return 0;
}
@Override
public int Compair(String username,String PassWord) {
Connection conn;
PreparedStatement ps = null;
String[] name = null;
String[] PWD = null;
PWD = new String[11];
name = new String[11];
name[0] = "1";PWD[0] = "1";
name[1] = "2";PWD[1] = "2";
name[2] = "3";PWD[2] = "3";
name[3] = "4";PWD[3] = "4";
name[4] = "5";PWD[4] = "5";
name[5] = "6";PWD[5] = "6";
name[6] = "7";PWD[6] = "7";
name[7] = "8";PWD[7] = "8";
name[8] = "9";PWD[8] = "9";
name[9] = "10";PWD[9] = "10";
try{
conn = DBUtil.getConnection();
String strSQl = "select UserName,PassWord from Adminmseager";
ps = conn.prepareStatement(strSQl);
ps.execute();//执行语句
ResultSet rs = ps.getResultSet();// 获得结果
while(rs.next()){
for (int i = 0; i < name.length; i++) {
//System.out.println("========="+rs.getString(1));
//System.out.println("========="+rs.getString(2));
if(rs.getString(1).equals(name[i])||rs.getString(2).equals(PWD[i])){
System.out.println("输入正确!");
return i + 1;
}if(!rs.getString(1).equals(name[i])){
System.out.println("请输入正确的管理员帐号!");
}if(!rs.getString(2).equals(PWD[i])){
System.out.println("请输入正确的登录密码!");
}
}
return -1;
}
}catch(Exception e){
e.printStackTrace();
}
return 0;
}
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import java.io.*;class database_manage { public Connection conn = null; public ResultSet rs = null; private String DatabaseDriver = "com.mysql.jdbc.Driver";
// DataSource 数据源名称DSN
private String DatabaseConnStr = "jdbc:mysql://localhost:3306/people_manage?useUnicode=true&characterEncoding=utf8"
+ ",root,root"; public void setDatabaseDriver(String Driver) {
this.DatabaseDriver = Driver;
} public String getDatabaseDriver() {
return (this.DatabaseDriver);
} public void setDatabaseConnStr(String ConnStr) {
this.DatabaseConnStr = ConnStr;
} public String getDatabaseConnStr() {
return (this.DatabaseConnStr);
} public database_manage() {// 构造函数连接数据库
try {
Class.forName(DatabaseDriver);
} catch (java.lang.ClassNotFoundException e) {
System.err.println("加载驱动器有错误:" + e.getMessage());
System.out.print("执行插入有错误:" + e.getMessage());// 输出到客户端
}
}
public ResultSet query(String sql) {// 查询数据库
rs = null;
try {
conn = DriverManager
.getConnection(
"jdbc:mysql://localhost:3306/people_manage?useUnicode=true&characterEncoding=utf8",
"root", "root");
Statement stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
} catch (SQLException ex) {
System.err.println("执行查询有错误:" + ex.getMessage());
System.out.print("执行查询有错误:" + ex.getMessage()); // 输出到客户端
} return rs; } public int update_database(String sql) {// 更新或插入数据库
int num = 0;
try {
conn = DriverManager
.getConnection(
"jdbc:mysql://localhost:3306/people_manage?useUnicode=true&characterEncoding=utf8",
"root", "root");
Statement stmt = conn.createStatement();
num = stmt.executeUpdate(sql);
} catch (SQLException ex) {
System.err.println("执行插入有错误:" + ex.getMessage());
System.out.print("执行插入有错误:" + ex.getMessage());// 输出到客户端
} CloseDataBase();
return num; } public void CloseDataBase() {// 关闭数据库
try {
conn.close();
} catch (Exception end) {
System.err.println("执行关闭Connection对象有错误:" + end.getMessage());
System.out.print("执行执行关闭Connection对象有错误:有错误:" + end.getMessage()); // 输出到客户端
}
}}class people {
private String uid;
private String name;
private String banji;
private int score; public people() {
} public people(String uid, String name, String banji) {
this.uid = uid;
this.name = name;
this.banji = banji;
} public people(String uid, String name, String banji, int score) {
this.uid = uid;
this.name = name;
this.banji = banji;
this.score = score;
} public String getUid() {
return uid;
} public void setUid(String uid) {
this.uid = uid;
} public String getName() {
return name;
} public void setName(String name) {
this.name = name;
} public String getBanji() {
return banji;
} public void setBanji(String banji) {
this.banji = banji;
} public int getScore() {
return score;
} public void setScore(int score) {
this.score = score;
}}public class manage { private people[] people_array1;// 对象数组 public void add_people(String uid, String name) { String sql = "insert people (uid,name) values ('" + uid + "','" + name
+ "')";// sql插入语句
// String sql2 = "insert people (uid,name) values ('uid001','tom')"; database_manage db_obj = new database_manage();
db_obj.update_database(sql);
} public void update_people(String uid, String name) { String sql = "update people set name='" + name + "' where uid='" + uid
+ "'";
database_manage db_obj = new database_manage();
db_obj.update_database(sql); } public void delete_people(String uid) { String sql = "delete from people where uid='" + uid + "'"; database_manage db_obj = new database_manage(); db_obj.update_database(sql); } public people query_people(String uid) {
database_manage db_obj = new database_manage();
// String adminid=null;
String uid_new, name, banji;
uid_new = null;
name = null;
banji = null;
String sql_query = "select * from people where uid='" + uid + "'"; try {
ResultSet rs = db_obj.query(sql_query);
if (rs.next()) {
uid_new = rs.getString("uid");
name = rs.getString("name");
banji = rs.getString("banji");
}
} catch (Exception e) {
e.getMessage();
}
people new_people = new people(uid_new, name, banji);
return new_people;
} public people[] query_people_byscore(int score) {
database_manage db_obj = new database_manage();
String uid_new, name, banji;
uid_new = null;
name = null;
banji = null;
int score_new = 0; String sql_query = "select * from people where score=" + score;// sql查询语句 try {
ResultSet rs = db_obj.query(sql_query);// 查询后,返回结果集
int num = 0;
ResultSet rs_new = rs;
while (rs_new.next()) {// 统计结果集中学生个数
num++;
}
// System.out.println(num); people_array1 = new people[num];
int i = 0;
rs.beforeFirst();// 返回结果集的开始
while (rs.next()) { uid_new = rs.getString("uid");
name = rs.getString("name");
banji = rs.getString("banji");
score_new = rs.getInt("score"); people_array1[i] = new people(uid_new, name, banji, score_new);
i++;
}
} catch (Exception e) {
e.getMessage();
}
return people_array1;
} public static void main(String args[]) { /*
* people new_people=new people();
*
* manage mr=new manage(); //mr.add_people("000","小明");插入一个学生的信息
*
* new_people=mr.query_people("001");//查询uid=001的学生信息,返回对象 System.out.
* println(""+new_people.getName()+" "+new_people.getBanji());
* mr.update_people("004", "小王");更新一个学生的信息
*
* new_people=mr.query_people("004");//更新后查询
*
* System.out.println(""+new_people.getName()+" "+new_people.getBanji(
* ));
*/ manage mr = new manage(); // mr.delete_people("001");删除uid=001的学生信息 people[] people_array;// 声明对象数组
people_array = mr.query_people_byscore(100);// 返回成绩为一百的学生类数组,后输出
int num = 0;
num = people_array.length;
for (int i = 0; i < num; i++) {
System.out.println(people_array[i].getUid() + " "
+ people_array[i].getName() + " "
+ people_array[i].getBanji() + " "
+ people_array[i].getScore()); }
}}这是我之前写的数据库程序 你可以参考下