📄 update.jsp
字号:
<%@ taglib prefix="sql" uri="http://java.sun.com/jsp/jstl/sql" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>JSTL: SQL action examples</title>
</head>
<body bgcolor="#FFFFFF">
<h1>SQL Update Execution</h1>
<!-- NOTE: the sql:setDataSource tag is for prototyping and simple applications. You should really use a DataSource object instead --!>
<sql:setDataSource
var="example"
driver="${sessionScope.myDbDriver}"
url="${sessionScope.myDbUrl}"
user="${sessionScope.myDbUserName}"
password="${sessionScope.myDbPassword}"
/>
<hr>
<sql:transaction dataSource="${example}">
<sql:update var="newTable">
create table mytable (
nameid int primary key,
name varchar(80)
)
</sql:update>
<h2>Inserting three rows into table</h2>
<sql:update var="updateCount">
INSERT INTO mytable VALUES (1,'Paul Oakenfold')
</sql:update>
<sql:update var="updateCount">
INSERT INTO mytable VALUES (2,'Timo Maas')
</sql:update>
<sql:update var="updateCount">
INSERT INTO mytable VALUES (3,'Paul van Dyk')
</sql:update>
<p>DONE: Inserting three rows into table</p>
<sql:query var="deejays">
SELECT * FROM mytable
</sql:query>
</sql:transaction>
<%-- An example showing how to populate a table --%>
<table border="1">
<%-- Get the column names for the header of the table --%>
<c:forEach var="columnName" items="${deejays.columnNames}">
<th><c:out value="${columnName}"/></th>
</c:forEach>
<%-- Get the value of each column while iterating over rows --%>
<c:forEach var="row" items="${deejays.rows}">
<tr>
<c:forEach var="column" items="${row}">
<td><c:out value="${column.value}"/></td>
</c:forEach>
</tr>
</c:forEach>
</table>
<h2>Deleting second row from table</h2>
<sql:update var="updateCount" dataSource="${example}">
DELETE FROM mytable WHERE nameid=2
</sql:update>
<p>DONE: Deleting second row from table</p>
<sql:query var="deejays" dataSource="${example}">
SELECT * FROM mytable
</sql:query>
<%-- Yet another example showing how to populate a table --%>
<table border="1">
<c:forEach var="row" items="${deejays.rows}" varStatus="status">
<%-- Get the column names for the header of the table --%>
<c:choose>
<c:when test="${status.count == 1}">
<%-- Each row is a Map object key'd by the column name --%>
<tr>
<c:forEach var="metaData" items="${row}">
<th><c:out value="${metaData.key}"/></th>
</c:forEach>
</tr>
</c:when>
</c:choose>
<tr>
<c:forEach var="column" items="${row}">
<%-- Get the value of each column while iterating over rows --%>
<td><c:out value="${column.value}"/></td>
</c:forEach>
</tr>
</c:forEach>
</table>
<sql:update var="newTable" dataSource="${example}">
drop table mytable
</sql:update>
</body>
</html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -