jsp 开发之servlet解决网页缓存问题
（1）我们为什么要防止游览器页面缓存的问题：
所以在不需要缓存的页面中需要实现不缓存页面；
代码如下：
package com.lc.httptest;
import java.io.ioexception;
import java.io.printwriter;
import javax.servlet.servletexception;
import javax.servlet.http.httpservlet;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
public class cachejiejue extends httpservlet {
public void doget(httpservletrequest request, httpservletresponse response)
throws servletexception, ioexception {
response.setcontenttype("text/html;charset=utf-8");
//指定该页面不缓存
response.setdateheader("expires",-1); //ie游览器支持的
//保证兼容性
response.setheader("cache-control", "no-cache");
response.setheader("pragme", "no-cache");
}
public void dopost(httpservletrequest request, httpservletresponse response)
throws servletexception, ioexception {
this.doget(request, response);
}
}
（2）但是如果要实现特定时间内的页面缓存 则代码如下：
package com.lc.httptest;
import java.io.ioexception;
import java.io.printwriter;
import javax.servlet.servletexception;
import javax.servlet.http.httpservlet;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
public class cachejiejue extends httpservlet {
public void doget(httpservletrequest request, httpservletresponse response)
throws servletexception, ioexception {
response.setcontenttype("text/html;charset=utf-8");
//指定该页面不缓存
//response.setdateheader("expires",-1); //ie游览器支持的
//缓存一定的时间 缓存 一天的时间
response.setdateheader("expires",system.currenttimemillis()+3600*1000*24);
//保证兼容性
response.setheader("cache-control", "no-cache");
response.setheader("pragme", "no-cache");
}
public void dopost(httpservletrequest request, httpservletresponse response)
throws servletexception, ioexception {
this.doget(request, response);
}
}
以上就是servlet解决网页缓存的实例详解，如有疑问请留言或者到本站社区交流讨论，感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！
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