时间：2021-07-01 10:21:17 帮助过：15人阅读
mysql创建 存储过程 并通过java程序调用该存储过程 create table users_ning(id primary key auto_increment,pwd int); insert into users_ning values(id,1234); insert into users_ning values(id,12345); insert into users_ning values(id,12); insert in
mysql创建 存储过程 并通过java程序调用该存储过程create table users_ning(id primary key auto_increment,pwd int);
insert into users_ning values(id,1234);
insert into users_ning values(id,12345);
insert into users_ning values(id,12);
insert into users_ning values(id,123);
CREATE PROCEDURE login_ning(IN p_id int,IN p_pwd int,OUT flag int)
BEGIN
DECLARE v_pwd int;
select pwd INTO v_pwd from users_ning
where id = p_id;
if v_pwd = p_pwd then
set flag:=1;
else
select v_pwd;
set flag := 0;
end if;
END
package demo20130528;
import java.sql.*;
import demo20130526.DBUtils;
/**
* 测试JDBC API调用过程
* @author tarena
*
*/
public class ProcedureDemo2 {
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
System.out.println(login(123, 1234));
}
/**
* 调用过程,实现登录功能
* @param id 考生id
* @param pwd 考试密码
* @return if成功:1; if密码错:0; if没有用户:-1
* @throws Exception
*/
public static int login(int id, int pwd) throws Exception{
int flag = -1;
String sql = "{call login_ning(?,?,?)}";//*****
Connection conn = DBUtils.getConnMySQL();
CallableStatement stmt = null;
try{
stmt = conn.prepareCall(sql);
//传递输入参数
stmt.setInt(1, id);
stmt.setInt(2, pwd);
//注册输出参数,第三个占位符的数据类型是整型
stmt.registerOutParameter(3, Types.INTEGER);//*****
//执行过程
stmt.execute();
//获得过程执行后的输出参数
flag = stmt.getInt(3);//*****
}catch(Exception e){
e.printStackTrace();
}finally{
stmt.close();
DBUtils.dbClose();
}
return flag;
}
}
package demo20130526;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
public class DBUtils {
static Connection conn = null;
static PreparedStatement stmt = null;
static ResultSet rs = null;
static Statement st = null;
static String username = null;
static String password = null;
static String url = null;
static String driverName = null;
public static Connection getConnMySQL() throws Exception {// 连接mysql 返回conn
getUrlUserNamePassWordClassNameMySQL();
conn = DriverManager.getConnection(url, username, password);
// conn.setAutoCommit(false);设置自动提交为false
return conn;
}
public static Connection getConnORCALE() throws Exception {// 连接orcale
// 返回conn
getUrlUserNamePassWordClassNameORCALE();
conn = DriverManager.getConnection(url, username, password);
// conn.setAutoCommit(false);
return conn;
}
private static void getUrlUserNamePassWordClassNameORCALE()
throws Exception {
// 从资源文件 获取 orcale的username password url等信息
Properties pro = new Properties();
File path = new File("src/all.properties");
pro.load(new FileInputStream(path));
String paths = pro.getProperty("filepath");
File file = new File(paths + "orcale.properties");
getFromProperties(file);
}
public static void getUrlUserNamePassWordClassNameMySQL() throws Exception {
// 从资源文件 获取mysql的username password url等信息
Properties pro = new Properties();
File path = new File("src/all.properties");
pro.load(new FileInputStream(path));
String paths = pro.getProperty("filepath");
File file = new File(paths + "mysql.properties");
getFromProperties(file);
}
public static void getFromProperties(File file) throws IOException,
FileNotFoundException, ClassNotFoundException {// 读资源文件的内容
Properties pro = new Properties();
pro.load(new FileInputStream(file));
username = pro.getProperty("username");
password = pro.getProperty("password");
url = pro.getProperty("url");
driverName = pro.getProperty("driverName");
Class.forName(driverName);
}
public static void dbClose() throws Exception {// 关闭所有
if (rs != null)
rs.close();
if (st != null)
st.close();
if (stmt != null)
stmt.close();
if (conn != null)
conn.close();
}
public static ResultSet getById(String tableName, int id) throws Exception {// 用id来查询结果
st = conn.createStatement();
rs = st.executeQuery("select * from " + tableName + " where id=" + id
+ " ");
return rs;
}
public static ResultSet getByAll(String sql, Object... obj)
throws Exception {// 用关键字 实现查询 关键字额可以任意
sql = sql.replaceAll(";", "");
sql = sql.trim();
stmt = conn.prepareStatement(sql);
String[] strs = sql.split("\\?");// 将sql 以? 非开
int num = strs.length;// 得到?的个数
int size = obj.length;
for (int i = 1; i <= size; i++) {
stmt.setObject(i, obj[i - 1]);// 数组下标从0开始
}
if (size < num) {
for (int k = size + 1; k <= num; k++) {
stmt.setObject(k, null);// 数组下标从0开始
}
}
rs = stmt.executeQuery();
return rs;
}
public static void doInsert(String sql) throws SQLException {// 传入 sql 语句
// 实现插入操作
st = conn.createStatement();
st.execute(sql);
}
public static void doInsert(String sql, Object... args) throws Exception {// 传入参数
// 利用
// PreparedStatement
// 实现插入
// 传入的参数是任意多个 因为有Object 。。。args
int size = args.length;// 获得 Object ...obj 传过来的参数的个数
stmt = conn.prepareStatement(sql);
for (int i = 1; i <= size; i++) {
stmt.setObject(i, args[i - 1]);// 数组下标从0开始
}
stmt.execute();
}
public static int doUpdate(String sql) throws Exception {// 传入 sql 实现更新操作
st = conn.createStatement();
int num = st.executeUpdate(sql);
return num;
}
public static void doUpdate(String sql, Object... obj) throws Exception {
// 传入参数 利用 PreparedStatement实现更新
// 传入的参数是任意多个 因为有Object 。。。args
int size = obj.length;// 获得 Object ...obj 传过来的参数的个数
stmt = conn.prepareStatement(sql);
for (int i = 1; i <= size; i++) {
stmt.setObject(i, obj[i - 1]);// 数组下标从0开始
}
stmt.executeUpdate(sql);
}
public static boolean doDeleteById(String tableName, int id)
throws SQLException {// 删除记录 by id
st = conn.createStatement();
boolean b = st.execute("delete from " + tableName + " where id=" + id
+ "");
return b;
}
public static boolean doDeleteByAll(String sql, Object... args)
throws SQLException {// 删除记录 可以按任何关键字
sql = sql.replaceAll(";", "");
sql = sql.trim();
stmt = conn.prepareStatement(sql);
String[] strs = sql.split("\\?");// 将sql 以? 非开
int num = strs.length;// 得到?的个数
int size = args.length;
for (int i = 1; i <= size; i++) {
stmt.setObject(i, args[i - 1]);// 数组下标从0开始
}
if (size < num) {
for (int k = size + 1; k <= num; k++) {
stmt.setObject(k, null);// 数组下标从0开始
}
}
boolean b = stmt.execute();
return b;
}
public static void getMetaDate() throws Exception {// 获取数据库元素数据
conn = DBUtils.getConnORCALE();
DatabaseMetaData dmd = conn.getMetaData();
System.out.println(dmd.getDatabaseMajorVersion());
System.out.println(dmd.getDatabaseProductName());
System.out.println(dmd.getDatabaseProductVersion());
System.out.println(dmd.getDatabaseMinorVersion());
}
public static String[] getColumnNamesFromMySQL(String sql) throws Exception {
conn = DBUtils.getConnMySQL();
return getColumnName(sql);
}
public static String[] getColumnNamesFromOrcale(String sql)
throws Exception {
conn = DBUtils.getConnORCALE();
return getColumnName(sql);
}
private static String[] getColumnName(String sql) throws Exception {// 返回表中所有的列名
conn = DBUtils.getConnORCALE();
st = conn.createStatement();
rs = st.executeQuery(sql);
ResultSetMetaData rsmd = rs.getMetaData();
int num = rsmd.getColumnCount();
System.out.println("ColumnCount=" + num);
String[] strs = new String[num];
// 显示列名
for (int i = 1; i <= rsmd.getColumnCount(); i++) {
String str = rsmd.getColumnName(i);
strs[i - 1] = str;
System.out.print(str + "\t");
}
return strs;
}
public static void getColumnDataFromMySQL(String sql) throws Exception {// 输出表中的数据
conn = DBUtils.getConnMySQL();
getColumnData(sql);
}
public static void getColumnDataFromORCALEL(String sql) throws Exception {// 输出表中的数据
conn = DBUtils.getConnORCALE();
getColumnData(sql);
}
public static void getColumnData(String sql) throws Exception {// 输出表中的数据
st = conn.createStatement();
rs = st.executeQuery(sql);
ResultSetMetaData rsmd = rs.getMetaData();
System.out
.println("\n------------------------------------------------------------------------------------------------------------------------");
while (rs.next()) {
for (int i = 1; i <= rsmd.getColumnCount(); i++) {
System.out.print(rs.getString(i) + "\t");
}
System.out.println();
}
System.out
.println("------------------------------------------------------------------------------------------------------------------------");
}
public static void getTableDataFromOrcale(String sql) throws Exception {// 输出表的列名
// 和表中的全部数据
conn = DBUtils.getConnORCALE();
getTableData(sql);
}
public static void getTableDataFromMysql(String sql) throws Exception {// 输出表的列名
// 和表中的全部数据
conn = DBUtils.getConnMySQL();
getTableData(sql);
}
private static void getTableData(String sql) throws SQLException {
// getTableDataFromMysql
// getTableDataFromOrcale
st = conn.createStatement();
rs = st.executeQuery(sql);
ResultSetMetaData rsmd = rs.getMetaData();
int num = rsmd.getColumnCount();
System.out.println("ColumnCount=" + num);
String[] strs = new String[num];
// 显示列名
for (int i = 1; i <= rsmd.getColumnCount(); i++) {
String str = rsmd.getColumnName(i);
strs[i - 1] = str;
System.out.print(str + "\t");
}
System.out
.println("\n------------------------------------------------------------------------------------------------------------------------");
while (rs.next()) {
for (int i = 1; i <= rsmd.getColumnCount(); i++) {
System.out.print(rs.getString(i) + "\t");
}
System.out.println();
}
System.out
.println("------------------------------------------------------------------------------------------------------------------------");
}
}