数据库的测试代码如下 :
1、新建表test,sql代码如下:
create table test(
field1 int not null
)
TYPE=MyISAM ;
insert into test(field1) values(1);
2、删除已存在的存储过程,代码如下:
delimiter // -- 定义结束符号
drop procedure p_test;
3、mysql存储过程定义,代码如下:
create procedure p_test()
begin
declare temp int;
set temp = 0;
update test set field1 = values(temp);
end
4、 Java调用带有输入参数的存储过程,代码如下:
public static void callIn(int in){
//获取连接
Connection conn = ConnectDb.getConnection();
CallableStatement cs = null;
try {
//可以直接传入参数
//cs = conn.prepareCall("{call sp1(1)}");
//也可以用问号代替
cs = conn.prepareCall("{call sp1(?)}");
//设置第一个输入参数的值为110
cs.setInt(1, in);
cs.execute();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if(cs != null){
cs.close();
}
if(conn != null){
conn.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
5、Java调用带有输出参数的存储过程,代码如下:
public static void callOut() {
Connection conn = ConnectDb.getConnection();
CallableStatement cs = null;
try {
cs = conn.prepareCall("{call sp2(?)}");
//第一个参数的类型为Int
cs.registerOutParameter(1, Types.INTEGER);
cs.execute();
//得到第一个值
int i = cs.getInt(1);
System.out.println(i);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if(cs != null){
cs.close();
}
if(conn != null){
conn.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
6、Java调用输出结果集的存储过程,代码如下:
public static void callResult(){
Connection conn = ConnectDb.getConnection();
CallableStatement cs = null;
ResultSet rs = null;
try {
cs = conn.prepareCall("{call sp6()}");
rs = cs.executeQuery();
//循环输出结果
while(rs.next()){
System.out.println(rs.getString(1));
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if(rs != null){
rs.close();
}
if(cs != null){
cs.close();
}
if(conn != null){
conn.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
}
7、Java获取数据库连接的工具类,代码如下:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class ConnectDb {
public static Connection getConnection(){
Connection conn = null;
PreparedStatement preparedstatement = null;
try {
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
String dbname = "test";
String url="jdbc:mysql://localhost/dbname?user=root&password=root&useUnicode=true&characterEncoding=utf-8";
conn= DriverManager.getConnection(url);
} catch (Exception e) {
e.printStackTrace();
}
return conn;
}
}
来源:oschina
链接:https://my.oschina.net/u/727646/blog/423644