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<title>csdn_JSP教程(六)-怎么在JSP中跳转到别一页面</title>
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<td WIDTH="50%" bordercolor="#FFFFFF" CLASS="t1" bgcolor="#F0F0F0" align="center" nowrap>JSP教程(六)-怎么在JSP中跳转到别一页面</td>
<p> <td WIDTH="50%" bordercolor="#FFFFFF" CLASS="t1" bgcolor="#F0F0F0" align="center" nowrap>作者： 清枫</td></p>
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<br>
在JSP中使用jsp forward Action来实现页面的跳转功能。<br>
<br>
语法：<br>
<br>
<jsp:forward page="{relativeURL|<%= expression %>}"/> 或<br>
<jsp:forward page="{relativeURL|<%= expression %>}"><br>
<jsp:param name="parameterName"<br>
value="{parameterValue|<%= expression %>}"/>+</jsp:forward><br>
<br>
这个action使您可以将request向前到另外一个页面。它只有一个属性，page。Page应有一个相对的URL组成。这可以是一个静态的值或者是能够在被请求的时候计算得到的值，就如下面两个例子一般：<br>
<br>
<jsp:forward page="/utils/errorReporter.jsp"/><br>
<jsp:forward page="<%= someJavaExpression %>"/><br>
!supportEmptyParas]> <br>
<br>
现在以一个具体例子来说明：在test1.jsp中使用forward使其跳转到test2.jsp页面中。<br>
<br>
Test1.jsp<br>
<HTML><br>
<HEAD><br>
<TITLE>forward test</TITLE><br>
!supportEmptyParas]> <br>
</HEAD><br>
!supportEmptyParas]> <br>
<BODY BGCOLOR="#FFFFFF"><br>
<!--跳转到test2.jsp--!><br>
<jsp:forward page="/test2.jsp"/><br>
</BODY><br>
</HTML><br>
!supportEmptyParas]> <br>
test2.jsp<br>
<HTML><br>
<HEAD><br>
<TITLE> forward test </TITLE><br>
!supportEmptyParas]> <br>
</HEAD><br>
!supportEmptyParas]> <br>
<BODY BGCOLOR="#FFFFFF"><br>
<%out.println("这是jsp2.jsp页面产生出的输出");%><br>
</BODY><br>
</HTML><br>
!supportEmptyParas]> <br>
运行test1.jsp，可在浏览器中看见："这是jsp2.jsp页面产生出的输出"的输出信息。但是如果你在test1.jsp和test2.jsp这两个页面中有参数传递怎么办呢？用get方式吧，不但总的长度有限制，使用现在十分不方便，而且有时候还不安全。其实我们完全可以使用jsp1.1中给forward里提供的para属性就可以解决。现以test3.jsp和test4.jsp来说明。<br>
<br>
!supportEmptyParas]> <br>
Test1.jsp<br>
<HTML><br>
<HEAD><br>
<TITLE> forward test </TITLE><br>
!supportEmptyParas]> <br>
</HEAD><br>
!supportEmptyParas]> <br>
<BODY BGCOLOR="#FFFFFF"><br>
<jsp:forward page="/test4.jsp"><br>
<jsp:param name="name" value="powerman"/><br>
<jsp:param name="address" value=" 北京西大街188号"/><br>
</jsp:forward><br>
</BODY><br>
</HTML><br>
!supportEmptyParas]> <br>
test2.jsp<br>
<HTML><br>
<HEAD><br>
<TITLE>forward test</TITLE><br>
!supportEmptyParas]> <br>
</HEAD><br>
!supportEmptyParas]> <br>
<BODY BGCOLOR="#FFFFFF"><br>
<%<br>
out.println("这是jsp4.jsp页面产生出的输出"+"<br>");<br>
out.println("姓名："+request.getParameter("name")+"<br>");<br>
out.println("地址："+request.getParameter("address")+"<br>");<br>
!supportEmptyParas]> <br>
%><br>
</BODY><br>
</HTML><br>
<br>
运行test3.jsp，可在浏览器中看见：<br>
<br>
"这是jsp4.jsp页面产生出的输出<br>
姓名：powerman<br>
地址：北京西大街188号"<br>
<br>
的输出信息 <br>
<br>
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<tr> <td align=right colspan=2> <a href="28.html" tppabs="http://www.chinajavaworld.com/doc/servlet-jsp/28.html"> </a> <a href="30.html" tppabs="http://www.chinajavaworld.com/doc/servlet-jsp/30.html"> </a> </td> </tr>
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