HttpServletRequest存值

HttpServletRequest可以使用setAttribute方法将信息存入request对象中。setAttribute方法接受两个参数，第一个参数是键名，第二个参数是被存入的信息对象。如果键名已经存在，会覆盖原来的值。被存入的信息可以在转发给其他servlet时被获取到。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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