Java-EE-WEB工程师培训-7.doc

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Java EE WEB工程师培训
发表于2009-6-6 21:56|来自
51CTO网页

[只看他]

–调用有输入、输出参数的存储过程
################Michael分割线####################
• CallableStatement 简介
–CallableStatement 继承PreparedStatement
–提供了调用存储过程的能力
• 调用简单的存储过程

先创建一个存储过程
create procedure all_user()
select * from UserTbl

调用存储过程
call all_user();

F5刷新

ConnectionUtil.java
package com.michael.jdbc;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Properties;
public class ConnectionUtil {
第一种方法
public Connection getConnection(){
Connection conn = null;
try {
Class.forName加载驱动
Class.forName( com.mysql.jdbc.Driver );
DriverManager获水草玛瑙 得连接
conn = DriverManager.getConnection( jdbc:mysql:localhost:3306jdbc_db , root , mysqladmin
return conn;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
第二种方法
public Connection getConnection(String driver,String url,String user,String password){
Connection conn = null;
try {
Class.forName加载驱动
Class.forName(driver);
DriverManager获得连接
conn = DriverManager.getConnection(url,user,password);
return conn;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
第三种方法
public Connection openConnection(){
String driver =
String url =
String user =
String password =
Properties prop = new Properties();
Connection conn = null;
try {
加载属性文件
prop.load(this.getClass().getClassLoader().getResourceAsStream( DBConfig.properties ));
driver = prop.getProperty( driver );
url = prop.getProperty( url );
user = prop.getProperty( user );
password = prop.getProperty( password );
Class.forName加载驱动
Class.forName(driver);
DriverManager获得连接
conn = DriverManager.getConnection(url,user,password);
return conn;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
TestCallableStatement.java
package com.michael.jdbc;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
public class TestCallableStatement {
public static void call(){
Connection conn = new ConnectionUtil().openConnection();
try {
CallableStatement cstmt = conn.prepareCall( {call all_user()} );
ResultSet rs = cstmt.executeQuery();
while(rs.next()){
int id = rs.getInt(1);
String user = rs.getString(2);
String password = rs.getString(3);
int age = rs.getInt(4);
System.out.println(id+ : +user+ : +password+ : +age);
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
Main.java
package com.michael.main;
import com.michael.jdbc.TestCallableStatement;
public class Main {
public static void main(String[] args) {
TestCallableStatement.call();
}
}

• 调用有输入参数的存储过程

创建有输入参数的存储过程
create procedure insert_user(in un varchar(20),in pw varchar(20),in a int)
insert into UserTbl(user,password,age)
values(un,pw,a)

调用有输入参数高山茶 的存储过程
call insert_user('testname','123456',25)

数据己增加

TestCallableStatement.java
package com.michael.jdbc;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
public class TestCallableStatement {
调用简单的存储过程
public static void call1(){
Connection conn = new ConnectionUtil().openConnection();
try {
CallableStatement cstmt = conn.prepareCall( {call all_user()} );
ResultSet rs = cstmt.executeQuery();
while(rs.next()){
int id = rs.getInt(1);
String user = rs.getString(2);
String password = rs.getString(3);
int age = rs.getInt(4);
System.out.println(id+ : +user+ : +password+ : +age);
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
调用有输入参数的存储过程
public static void call2(){
Connection conn = new ConnectionUtil().openConnection();
try {
CallableStatement cstmt = conn.prepareCall( {call insert_user(?,?,?)} );
cstmt.setString(1, test1 );
cstmt.setString(2, test2 );
cstmt.setInt(3, 3);
cstmt.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
}finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
Main.java
package com.michael.main;
import com.michael.jdbc.TestCallableStatement;
public class Main {
public static void main(String[] args) {
TestCallableStatement.call2();
TestCallableStatement.call1();
}
}

• 调用有输入、输出参数的存储过程

创建有输入输出参数的存储过程
create procedure getAgeByName(in name varchar(20),out return_age int)
begin
declare a int;
select age into a from UserTbl where user=name;
set return_age = a;
end

测试查询michael

输出年龄11

调用有输入输出的存储过程
TestCallableStatement.java
package com.michael.jdbc;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Types;
public class TestCallableStatement {
调用简单的存储过程
public static void call1(){
Connection conn = new ConnectionUtil().openConnection();
try {
CallableStatement cstmt = conn.prepareCall( {call all_user()} );
ResultSet rs = cstmt.executeQuery();
while(rs.next()){
int id = rs.getInt(1);
String user = rs.getString(2);
String password = rs.getString(3);
int age = rs.getInt(4);
System.out.println(id+ : +user+ : +password+ : +age);
}
} catch (SQLException e) {
e.printStackTrace();
}finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
调用有输入参数的存储过程
public static void call2(){
Connection conn = new ConnectionUtil().openConnection();
try {
CallableStatement cstmt = conn.prepareCall( {call insert_user(?,?,?)} );
cstmt.setString(1, test1 );
cstmt.setString(2, test2 );
cstmt.setInt(3, 3);
cstmt.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
}finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
调用有输入输出参数的存储过程
public static void call3(){
Connection conn = new ConnectionUtil().openConnection();
try {
CallableStatement cstmt = conn.prepareCall( {call getAgeByName(?,?)} );
cstmt.setString(1, redking );
注册输出参数
cstmt.registerOutParameter(2, Types.INTEGER);
cstmt.execute();
int age = cstmt.getInt(2);
System.out.println(age);
} catch (SQLException e) {
e.printStackTrace();
}finally{
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
Main.java
package com.michael.main;
import com.michael.jdbc.TestCallableStatement;
public class Main {
public static void main(String[] args) {
TestCallableStatement.call2();
TestCallableStatement.call1();
TestCallableStatement.call3();
}
}
输出redking年龄为22

################Michael分割线####################
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