1建立LocalThread类,对分页的常数进行封装
代码如下
[java]
package com.tgb.oa;
/**
*
* 采用ThreadLocal来存储分页变量.
* @author jnqqls
* @group TGB
* @version 1.0
* @comments
*/
public class SystemContext {
private static ThreadLocal offset = new ThreadLocal();
private static ThreadLocal pagesize = new ThreadLocal();
/**
* 从线程中获取offset字段
* @return
*/
public static int getOffset(){
Integer os = (Integer)offset.get();
if(os == null){
return 0;
}
return os;
}
public static void setOffset(int offsetvalue){
offset.set(offsetvalue);
}
public static void removeOffset(){
offset.remove();
}
public static int getPagesize(){
Integer ps = (Integer)pagesize.get();
if(ps == null){
return Integer.MAX_VALUE;
}
return ps;
}
public static void setPagesize(int pagesizeva lue){
pagesize.set(pagesizeva lue);
}
public static void removePagesize(){
pagesize.remove();
}
}
package com.tgb.oa;
/**
*
* 采用ThreadLocal来存储分页变量.
* @author jnqqls
* @group TGB
* @version 1.0
* @comments
*/
public class SystemContext {
private static ThreadLocal offset = new ThreadLocal();
private static ThreadLocal pagesize = new ThreadLocal();
/**
* 从线程中获取offset字段
* @return
*/
public static int getOffset(){
Integer os = (Integer)offset.get();
if(os == null){
return 0;
}
return os;
}
public static void setOffset(int offsetvalue){
offset.set(offsetvalue);
}
public static void removeOffset(){
offset.remove();
}
public static int getPagesize(){
Integer ps = (Integer)pagesize.get();
if(ps == null){
return Integer.MAX_VALUE;
}
return ps;
}
public static void setPagesize(int pagesizeva lue){
pagesize.set(pagesizeva lue);
}
public static void removePagesize(){
pagesize.remove();
}
}
2建立PagerFilter过滤器,将参数读取到ThreadLocal中.
代码如下:
[java]
package com.tgb.oa.web;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import com.tgb.oa.SystemContext;
/**
*
* @oa_02 过滤器,获取相关分页数据.
* @author jnqqls
* @group TGB
* @version 1.0
* @comments
*/
public class PagerFilter implements Filter {
public void destroy() {
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpRequest = (HttpServletRequest)request;
SystemContext.setOffset(getOffset(httpRequest));
SystemContext.setPagesize(getPagesize(httpRequest));
try{