JSP页面中.分页显示的.前面还好..当上了了50条的时候就出现:java.lang.OutOfMemoryError: Java heap space
at java.lang.StringCoding$CharsetSD.decode(StringCoding.java:183)
at java.lang.StringCoding.decode(StringCoding.java:228)
at java.lang.String.<init>(String.java:405)内存错误了!
我是每次都查出来.然后每次显示一部分.这样肯定是有问题的.但是不这样.用SESSION也不行..
请问可以怎么样一次取出我想要的..
at java.lang.StringCoding$CharsetSD.decode(StringCoding.java:183)
at java.lang.StringCoding.decode(StringCoding.java:228)
at java.lang.String.<init>(String.java:405)内存错误了!
我是每次都查出来.然后每次显示一部分.这样肯定是有问题的.但是不这样.用SESSION也不行..
请问可以怎么样一次取出我想要的..
package cn.md.util;
/**
* <pre>
* 分页类
* </pre>
*
* <ul>处理分页的基本信息</ul>
* <ul>
* 处理分页的基本信息.<br>
* </ul>
* <br/>
*/
public class PageBean { /* 分页大小 */
private int pageRecorders = 10;
/** 前一页 */
private int previousPage;
/** 后一页 */
private int nextPage;
/** 当前页 */
private int currentPage;
/** 总页数 */
private int totalPages;
/** 总记录数 */
private int totalRecorders;
/** 是否有下一页 */
private boolean hasNextPage = false;
/** 是否有前一页 */
private boolean hasPreviousPage = false; /**
* 构造方法.
* <ul>
* 构造方法1,每页大小为2,测试用。
* </ul>
* @param currentPage int
* @param totalRecorders int
*/
public PageBean(int currentPage, int totalRecorders) {
this.currentPage = currentPage;
this.totalRecorders = totalRecorders;
//计数总共的页数
if ( (totalRecorders % pageRecorders) == 0) {
this.totalPages = totalRecorders / pageRecorders;
} else {
this.totalPages = totalRecorders / pageRecorders + 1;
}
if(this.totalPages<=0){
this.totalPages=1;
}
//处理不合法的当前页
if (this.currentPage >= this.totalPages) {
this.currentPage = this.totalPages;
}
if (this.currentPage <= 1) {
this.currentPage = 1;
}
//是否有下一页
if (this.currentPage >= this.totalPages) {
this.hasNextPage = false;
} else {
this.hasNextPage = true;
}
//是否有上一页
if ( this.currentPage == 1 ) {
this.hasPreviousPage = false;
} else {
this.hasPreviousPage = true;
}
this.nextPage=this.currentPage+1;
this.previousPage=this.currentPage-1;
} /**
* 构造方法.
* <ul>
* 构造方法2
* </ul>
* @param currentPage int
* @param totalRecorders int
*/
public PageBean(int currentPage, int totalRecorders, int pageSize) {
this.currentPage = currentPage;
this.totalRecorders = totalRecorders;
this.pageRecorders = pageSize;
//计数总共的页数
if ( (totalRecorders % pageSize) == 0) {
this.totalPages = totalRecorders / pageSize;
} else {
this.totalPages = totalRecorders / pageSize + 1;
}
//处理不合法的当前页
if (this.currentPage > this.totalPages) {
this.currentPage = this.totalPages;
}
if (this.currentPage < 1) {
this.currentPage = 1;
}
//是否有下一页
if (this.currentPage >= this.totalPages) {
this.hasNextPage = false;
} else {
this.hasNextPage = true;
}
//是否有上一页
if ( this.currentPage == 1 ) {
this.hasPreviousPage = false;
} else {
this.hasPreviousPage = true;
}
this.nextPage=this.currentPage+1;
this.previousPage=this.currentPage-1;
} /**
* 返回当前页
* @return int
*/
public int getCurrentPage() {
return currentPage;
}
/**
* 返回总页数
* @return int
*/
public int getTotalPages() {
return totalPages;
}
/**
* 返回总的记录数
* @return int
*/
public int getTotalRecorders() {
return totalRecorders;
}
/**
* 返回是否有下一页
* @return boolean
*/
public boolean isHasNextPage() {
return hasNextPage;
}
/**
* 返回是否有上一页
* @return boolean
*/
public boolean isHasPreviousPage() {
return hasPreviousPage;
} /**
* 返回每页的记录数
* @return int
*/
public int getPageRecorders() {
return pageRecorders;
} public int getPreviousPage() {
return previousPage;
} public void setPreviousPage(int previousPage) {
this.previousPage = previousPage;
} public int getNextPage() {
return nextPage;
} public void setNextPage(int nextPage) {
this.nextPage = nextPage;
}
}