标签：jsp   jstl   web.xml   upload   

JSP过滤器

<filter>
  <filter-name>FilterName</filter-name>
  <filter-class>TestFilter</filter-name>
  <init-param>
    <param-name>test-param</param-name>
    <param-value>test-value</param-name>
  </init-param>
</filter>

<filter-mapping>
  <filter-name>TestFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

文件上传

DiskFileItemFactory factory = new DiskFileItemFactory();
// 设置内存中存储文件的最大值
factory.setSizeThreshold(maxMemSize);
// 本地存储的数据大于 maxMemSize.
factory.setRepository(new File("c:\\temp"));

// 创建一个新的文件上传处理程序
ServletFileUpload upload = new ServletFileUpload(factory);
// 设置最大上传的文件大小
upload.setSizeMax( maxFileSize );
// 解析上传的文件
List fileItems = upload.parseRequest(request);

JSTL

<fmt:formatNumber value="${balance}" type="currency"/>

<c:if test="${fn:contains(theString, 'test')}">
   <p>Found test string<p>
</c:if>

数据库操作

<sql:setDataSource var="snapshot" driver="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost/test" user="root" password="123456"/>

<sql:query dataSource="${snapshot}" var="result">
  SELECT * FROM users;
</sql:query>

<sql:query dataSource="${snapshot}" var="result">
  SELECT * FROM users WHERE id = ?;
  <sql:param value="${userId}"/>
</sql:query>

自定义标签

<taglib>
  <tlib-version>1.0</tlib-version>
  <jsp-version>2.0</jsp-version>
  <short-name>Test TLD</short-name>
  <tag>
    <name>hello</name>
    <tag-class>com.pc.HelloTag</tag-class>
    <body-content>empty</body-content>
  </tag>
</taglib>

public class HelloTag extends SimpleTagSupport {
    public void doTag() {
        JspWriter out = getJspContext().getOut();
        out.println("Hello world!");
    }
}

<body-content>scriptless</body-content>

StringWriter writer = new StringWriter();
getJspBody().invoke(writer);

<tag>
  <attribute>
    <name>message</name>
  </attribute>
</tag>

// 由系统自动调用。
public void setMessage(String message) {
    this.message = message;
}

JSP简明教程（五）：高级特性,布布扣,bubuko.com

JSP简明教程（五）：高级特性

标签：jsp   jstl   web.xml   upload   

原文地址：http://blog.csdn.net/caipeichao2/article/details/38665075