java语言代码大全_java语言代码大全解析

大家好，又见面了，我是你们的朋友全栈君。

Java语言是如今互联网最热门的语言之一，今天我们就来了解一些java语言经常用到的代码，快来看看吧。

一、jdbc连接public class OracleJdbcTest

{

String driverClass = “oracle.jdbc.driver.OracleDriver”;

Connection con;

public void init(FileInputStream fs) throws ClassNotFoundException, SQLException, FileNotFoundException, IOException

{

Properties props = new Properties();

props.load(fs);

String url = props.getProperty(“db.url”);

String userName = props.getProperty(“db.user”);

String password = props.getProperty(“db.password”);

Class.forName(driverClass);

con = DriverManager.getConnection(url, userName, password);

}

public void fetch() throws SQLException, IOException

{

PreparedStatement ps = con.prepareStatement(“select SYSDATE from dual”);

ResultSet rs = ps.executeQuery();

while (rs.next())

{

// do the thing you do

}

rs.close();

ps.close();

}

public static void main(String[] args)

{

OracleJdbcTest test = new OracleJdbcTest();

test.init();

test.fetch();

}

}

二、分页实现public class PageBean

{

private int curPage; //当前页

private int pageCount; //总页数

private int rowsCount; //总行数

private int pageSize = 10; //每页多少行

public PageBean(int rows)

{

this.setRowsCount(rows);

if (this.rowsCount % this.pageSize == 0)

{

this.pageCount = this.rowsCount / this.pageSize;

}

else if (rows

{

this.pageCount = 1;

}

else

{

this.pageCount = this.rowsCount / this.pageSize + 1;

}

}

public int getCurPage()

{

return curPage;

}

public void setCurPage(int curPage)

{

this.curPage = curPage;

}

public int getPageCount()

{

return pageCount;

}

public void setPageCount(int pageCount)

{

this.pageCount = pageCount;

}

public int getPageSize()

{

return pageSize;

}

public void setPageSize(int pageSize)

{

this.pageSize = pageSize;

}

public int getRowsCount()

{

return rowsCount;

}

public void setRowsCount(int rowsCount)

{

this.rowsCount = rowsCount;

}

}

三、解析xml<?xml version=”1.0″?>

John

B

12

Mary

A

11

Simon

A

18

四、字符串整形互相转换String a = String.valueOf(2); //integer to numeric string

int i = Integer.parseInt(a); //numeric string to an int

五、字符串转日期String methodName = Thread.currentThread().getStackTrace()[1].getMethodName();

以上就是今天的全部内容，想知道更多java入门知识的小伙伴，欢迎关注我们持续了解详情。

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