oracle分页（从jsp--->dao层，中间用json格式传递数据），数组的分页
2013-09-13 11:15
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声明：以下内容是在工作过程中总结，主要是供本人参考使用，可能不适用所有人，请谅解，谢谢
用oracle数据库的sql语句分页
---------------------------------------------------------html----分页部分----开始-----------------------------------------------------
<!--分页开始-->
<div class="outline">
<div class="pagination'>
<div class="pagination">
<!--第一页-->
<image src="images/firstpage.png" onclick="firstPage()"/>
<!--上一页-->
<image src="images/prepage.png"
onclick="prePage()"/>
<div>第</div>
<input id="page_goto" type="text" value="<%=pageCont.getPageNo() %>" name="<%=pageCont.getPageNo()
%>"/>
<div>页共</div>
<div id="page_num'><span><%=pageCont.getTotalPages()%></span></div>
<div>页</div>
<!--下一页-->
<image src="images/nextpage.png" onclick="nextPage()"/>
<!--最后一页-->
<image src="images/lastpage.png" onclick="lastPage()"/>
<!--刷新-->
<image src="images/firstpage.png" onclick="refresh()"/>
</div>
</div>
</div>
<!--分页结束-->
----------------------------------------------------------html----分页部分----开始-----------------------------------------------------
----------------------------------------------------------javascript----分页部分----开始-----------------------------------------------------
//封装分页js()
var path = "xxx.action"; //要访问的action
var data = ""; //带条件查询的分页，data中加入查询条件
//第一页
function firstPage(path){
var currentPage = parseInt($("#page_goto").val())
if(currentPage == 1){
$("#page_goto").val("1");
alert(”已经第一页“);
}else{
queryData(path, 1, data);
}
}
//上一页
function prePage(path){
var prePage = parseInt($("#page_goto").val()) - 1;
if(prePage < 1){
$("#page_goto").val("1");
alert("第一页");
return;
}else{
queryData(path, prePage, data);
}
}
//下一页
function nextPage(path){
var nextPage = parseInt($("#page_goto").val()) + 1;
var pageSum = parseInt($("#page_num").text());
if(nextPage > pageSum){
$("#page_goto").val(pageSum);
alert("最后一页");
return;
}else{
queryData(path, nextPage, data);
}
}
//最后一页
function lastPage(path){
var pageSum = parseInt($("#page_num").text());
var currtPage = parseInt($("#page_goto").val());
if(pageSum == currtPage){
$("#page_goto").val(pageSum);
alert("已经最后一页");
}else{
queryData(path, pageSum, data);
}
}
//输入页码，跳转到指定页数
//刷新
function refresh(path){
var currtPage = parseInt($("#page_goto").val());
var pageSum = parseInt($("#page_num").text());
if((currtPage > 0) && (currtPage <= pageSum)){
queryData(path, currtPage, data);
}else{
alert("请输入正确的页码");
}
}
//查询数据
function queryData(){
$.ajax({
type：“POST”,
url:path,
data:"pageNo=" + pageNo+"&isajax=true" + data + "&time=" + new Date().getTime(),
async:true, //是否异步
cache:false, //是否缓存
success:function(msg){
var obj = eval("(" + msg + ")");
//向页面中摄入值
$("#page_goto").val(obj.pageNo);
//动态生成tr
createTr(obj);
}
});
}
//动态生成表单
function createTr(obj){
//首先将当前列表移除
$("#tbody tr").remove();
for(var i=0; i<obj.list.length; i++ )
var str = "<tr id= 'trid" +i+" ' onmouseover = 'mouseover("+i+")' onmouseout='mouseout(" +i+ ")'>";
//注意：这里单引号和双引号之间的空格可能要删除
str += "<td><input type='checkbox' name='xuhao' value=' " + obj.list[i].hdt_id + " ' / >";
str +="<td id= 'hdt_id" +i+" '>" + obj.list[i].name + "</td>";
……
str
+="<td id= 'hdt_age" +i+" '>" + obj.list[i].age + "</td>";
$("#tbody').append(str);
}
$("#page_num span").text(obj.totalPages);
}
//鼠标移到某一行上是添加样式
function mouseover(i){
$(("#trid" + i)).css("background-color", "#535353");
}
//当鼠标移除该行时改变样式
function mouseover(i){
$(("#trid" + i)).css("background-color", " ");
}
----------------------------------------------------------javascript----分页部分----结束-----------------------------------------------------
----------------------------------------------------------java类----PageModel----开始-----------------------------------------------------
package com.tools;
//注意这里用到json的jar包
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONObject;
import net.sf.json.JSONConfig;
import org.apache.struts2.ServletActionContext;
/**
*封装分页信息
*lijunjun
*/
public class PageModel<T>{ //这里T是列表中展示vo对象
//结果集
private List<T> list;
//查询记录数
private int totalRecords;
//每页多少条记录
private int pageSize;
//当前页码
private int pageNo;
//总页数
private int totalPages;
//生成get/set方法：如下总页数get方法比较特殊：如下
//总页数get方法
public int getTotalPages(){
int size = (this.totalRecords + pageSize -1) / pageSize;
return size;
}
public String getJsonStr(Object obj){
JsonConfig jsonConfig = new JsonConfig();
//这里是处理将日期转换成json格式的处理类
jsonConfig.registerJsonValueProcessor(java.sql.TimeStamp.class, new DataJsonValueProcessor());
JSONObject jsObject = JSONObject.fromObject(obj, jsonConfig);
String msg = jsObject.toString();
return msg;
}
public void sendJsonData(){
try{
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
String msg = getJsonStr(this);
out.print(msg);
out.flush();
out.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
注意：需要导入json运行的jar包：
person类 ：
import java.sql.Timestamp;
public class Person {
private int id;
private String usrname;
private Timestamp borthdate; //如果这里是Date，则将工具类中的TimeStamp改为Date即可
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsrname() {
return usrname;
}
public void setUsrname(String usrname) {
this.usrname = usrname;
}
public Timestamp getBorthdate() {
return borthdate;
}
public void setBorthdate(Timestamp borthdate) {
this.borthdate = borthdate;
}
}
json日期格式转化工具类：
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Date;
import net.sf.json.JsonConfig;
import net.sf.json.processors.JsonValueProcessor;
/**
* JSON日期格式转换
*
*/
public class DateJsonValueProcessor implements JsonValueProcessor
{
private String format = "yyyy-MM-dd HH:mm:ss";
public DateJsonValueProcessor()
{ }
public DateJsonValueProcessor(String format)
{
this.format = format;
}
//如果person类中的borthdate属性的类型为Date，则将该方法中的Timestamp改为Date即可
public Object processArrayValue(Object value, JsonConfig jsonConfig)
{
String[] obj = {};
if (value instanceof Timestamp[])
{
SimpleDateFormat sf = new SimpleDateFormat(format);
Timestamp[] dates = (Timestamp[]) value;
obj = new String[dates.length];
for (int i = 0; i < dates.length; i++)
{
obj[i] = sf.format(dates[i]);
}
}
return obj;
}
public Object processObjectValue(String key, Object value, JsonConfig jsonConfig)
{
if (value instanceof Date)
{
String str = new SimpleDateFormat(format).format((Date) value);
return str;
}
return value;
}
public String getFormat()
{
return format;
}
public void setFormat(String format)
{
this.format = format;
}
}
测试类：
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Date;
import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;
public class test {
public static void main(String[] args) {
JsonConfig jsonConfig = new JsonConfig();
Person p = new Person();
p.setId(1);
p.setUsrname("zhangsan");
p.setBorthdate(new Timestamp(System.currentTimeMillis()));
jsonConfig.registerJsonValueProcessor(java.sql.Timestamp.class, new DateJsonValueProcessor());
JSONObject jsonObj = JSONObject.fromObject(p, jsonConfig);
System.out.println(jsonObj);
}
}
----------------------------------------------------------java类----PageModel----结束-----------------------------------------------------
----------------------------------------------------------action---开始-----------------------------------------------------
public class LsbzAction extends ActionSupport{
private PageNodel<User> page;
private boolean isajax;
//get.set方法
public String execute(){
this.page = lsbzDao.selectUserList(pageNo, pageSize);
if(isajax){
page.sendJsonData();
}
return success;
}
}
----------------------------------------------------------action----结束-----------------------------------------------------
---------------------------------------------------------dao层分页sql语句----开始-----------------------------------------------------
public class LsbzImpl extends JdbcTemplate implements LsbzDao{
private PageModel<User> page;
public void setPage(PageModel<LsbzVo> page){
this.page = page;
}
public PageModel<User> selectUserList(int pageNo, int pageSize) throws Exception{
StringBuffer sbsql = new StringBuffer();
sbsql.append("select id , username, age from ( ")
.append(" select rownum rn, id , username, age from( ")
.append(" select id, username, age from test order by id ")
.append(" ) where rownum <= " + (pageNo * pageSize))
.append(" ) where rn > " + (pageNo - 1) * pageSize);
//这里连接数据库是用spring的jdbcTemplate或者SimpleJdbcTemplate
List<User> list = this.queryForList(sbSql.toString(), LsbzVo.class, String.valueOf(page*pageSize), String.valueOf((pageNo-1) * pageSize));
this.page.setList(list);
this.page.setTotalRecords(getTotalRecords());
this.page.setPageSize(pageSize);
this.page.setPageNo(pageNo);
return this.page;
}
}
--------------------------------------------------------- dao层分页sql语句 ----结束-----------------------------------------------------
模拟数组分页：
---------------------------------------------------------数组分页----开始-----------------------------------------------------
package epurse.front.base;
import java.util.ArrayList;
import java.util.List;
public class Pagination {
private int maxPageLength = 10; // 页面最大记录数
private int currentPage = 1;// 当前页面数
private int maxLength = 0; // 总记录数
private int maxPage = 1; // 总页数
private List list; // 返回记录集
private List resultList; // 目标记录集
public List getResultList() {
return resultList;
}
public int getMaxPageLength() {
return maxPageLength;
}
public void setMaxPageLength(int maxPageLength) {
this.maxPageLength = maxPageLength;
}
public void setResultList(List resultList) {
this.resultList = resultList;
}
/**
* @author wxj
* @param resultList
* @return maxLength
*/
public int getMaxLength() {
if(this.resultList==null||this.resultList.isEmpty()){
maxLength = 0;
}
else{
maxLength = this.resultList.size();
}
return maxLength;
}
public int getMaxPage() {
int maxPage = getMaxLength() / this.maxPageLength;
if (getMaxLength() % this.maxPageLength != 0) {
maxPage = maxPage + 1;
}
return maxPage;
}
public List getList() {
List list = new ArrayList();
if(this.resultList!=null&&!this.resultList.isEmpty()){
int length;
if(getCurrentPage() == getMaxPage())
{
length = getMaxLength();
}
else
{
length = getCurrentPage() * getMaxPageLength();
}
for (int i = (currentPage-1) * getMaxPageLength(); i < length; i++) {
list.add(this.resultList.get(i));
}
}
return list;
}
public int getCurrentPage() {
return currentPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
}
---------------------------------------------------------数组分页----结束-----------------------------------------------------
用oracle数据库的sql语句分页
---------------------------------------------------------html----分页部分----开始-----------------------------------------------------
<!--分页开始-->
<div class="outline">
<div class="pagination'>
<div class="pagination">
<!--第一页-->
<image src="images/firstpage.png" onclick="firstPage()"/>
<!--上一页-->
<image src="images/prepage.png"
onclick="prePage()"/>
<div>第</div>
<input id="page_goto" type="text" value="<%=pageCont.getPageNo() %>" name="<%=pageCont.getPageNo()
%>"/>
<div>页共</div>
<div id="page_num'><span><%=pageCont.getTotalPages()%></span></div>
<div>页</div>
<!--下一页-->
<image src="images/nextpage.png" onclick="nextPage()"/>
<!--最后一页-->
<image src="images/lastpage.png" onclick="lastPage()"/>
<!--刷新-->
<image src="images/firstpage.png" onclick="refresh()"/>
</div>
</div>
</div>
<!--分页结束-->
----------------------------------------------------------html----分页部分----开始-----------------------------------------------------
----------------------------------------------------------javascript----分页部分----开始-----------------------------------------------------
//封装分页js()
var path = "xxx.action"; //要访问的action
var data = ""; //带条件查询的分页，data中加入查询条件
//第一页
function firstPage(path){
var currentPage = parseInt($("#page_goto").val())
if(currentPage == 1){
$("#page_goto").val("1");
alert(”已经第一页“);
}else{
queryData(path, 1, data);
}
}
//上一页
function prePage(path){
var prePage = parseInt($("#page_goto").val()) - 1;
if(prePage < 1){
$("#page_goto").val("1");
alert("第一页");
return;
}else{
queryData(path, prePage, data);
}
}
//下一页
function nextPage(path){
var nextPage = parseInt($("#page_goto").val()) + 1;
var pageSum = parseInt($("#page_num").text());
if(nextPage > pageSum){
$("#page_goto").val(pageSum);
alert("最后一页");
return;
}else{
queryData(path, nextPage, data);
}
}
//最后一页
function lastPage(path){
var pageSum = parseInt($("#page_num").text());
var currtPage = parseInt($("#page_goto").val());
if(pageSum == currtPage){
$("#page_goto").val(pageSum);
alert("已经最后一页");
}else{
queryData(path, pageSum, data);
}
}
//输入页码，跳转到指定页数
//刷新
function refresh(path){
var currtPage = parseInt($("#page_goto").val());
var pageSum = parseInt($("#page_num").text());
if((currtPage > 0) && (currtPage <= pageSum)){
queryData(path, currtPage, data);
}else{
alert("请输入正确的页码");
}
}
//查询数据
function queryData(){
$.ajax({
type：“POST”,
url:path,
data:"pageNo=" + pageNo+"&isajax=true" + data + "&time=" + new Date().getTime(),
async:true, //是否异步
cache:false, //是否缓存
success:function(msg){
var obj = eval("(" + msg + ")");
//向页面中摄入值
$("#page_goto").val(obj.pageNo);
//动态生成tr
createTr(obj);
}
});
}
//动态生成表单
function createTr(obj){
//首先将当前列表移除
$("#tbody tr").remove();
for(var i=0; i<obj.list.length; i++ )
var str = "<tr id= 'trid" +i+" ' onmouseover = 'mouseover("+i+")' onmouseout='mouseout(" +i+ ")'>";
//注意：这里单引号和双引号之间的空格可能要删除
str += "<td><input type='checkbox' name='xuhao' value=' " + obj.list[i].hdt_id + " ' / >";
str +="<td id= 'hdt_id" +i+" '>" + obj.list[i].name + "</td>";
……
str
+="<td id= 'hdt_age" +i+" '>" + obj.list[i].age + "</td>";
$("#tbody').append(str);
}
$("#page_num span").text(obj.totalPages);
}
//鼠标移到某一行上是添加样式
function mouseover(i){
$(("#trid" + i)).css("background-color", "#535353");
}
//当鼠标移除该行时改变样式
function mouseover(i){
$(("#trid" + i)).css("background-color", " ");
}
----------------------------------------------------------javascript----分页部分----结束-----------------------------------------------------
----------------------------------------------------------java类----PageModel----开始-----------------------------------------------------
package com.tools;
//注意这里用到json的jar包
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONObject;
import net.sf.json.JSONConfig;
import org.apache.struts2.ServletActionContext;
/**
*封装分页信息
*lijunjun
*/
public class PageModel<T>{ //这里T是列表中展示vo对象
//结果集
private List<T> list;
//查询记录数
private int totalRecords;
//每页多少条记录
private int pageSize;
//当前页码
private int pageNo;
//总页数
private int totalPages;
//生成get/set方法：如下总页数get方法比较特殊：如下
//总页数get方法
public int getTotalPages(){
int size = (this.totalRecords + pageSize -1) / pageSize;
return size;
}
public String getJsonStr(Object obj){
JsonConfig jsonConfig = new JsonConfig();
//这里是处理将日期转换成json格式的处理类
jsonConfig.registerJsonValueProcessor(java.sql.TimeStamp.class, new DataJsonValueProcessor());
JSONObject jsObject = JSONObject.fromObject(obj, jsonConfig);
String msg = jsObject.toString();
return msg;
}
public void sendJsonData(){
try{
HttpServletResponse response = ServletActionContext.getResponse();
response.setContentType("text/html; charset=utf-8");
PrintWriter out = response.getWriter();
String msg = getJsonStr(this);
out.print(msg);
out.flush();
out.close();
}catch(IOException e){
e.printStackTrace();
}
}
}
注意：需要导入json运行的jar包：
person类 ：
import java.sql.Timestamp;
public class Person {
private int id;
private String usrname;
private Timestamp borthdate; //如果这里是Date，则将工具类中的TimeStamp改为Date即可
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsrname() {
return usrname;
}
public void setUsrname(String usrname) {
this.usrname = usrname;
}
public Timestamp getBorthdate() {
return borthdate;
}
public void setBorthdate(Timestamp borthdate) {
this.borthdate = borthdate;
}
}
json日期格式转化工具类：
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Date;
import net.sf.json.JsonConfig;
import net.sf.json.processors.JsonValueProcessor;
/**
* JSON日期格式转换
*
*/
public class DateJsonValueProcessor implements JsonValueProcessor
{
private String format = "yyyy-MM-dd HH:mm:ss";
public DateJsonValueProcessor()
{ }
public DateJsonValueProcessor(String format)
{
this.format = format;
}
//如果person类中的borthdate属性的类型为Date，则将该方法中的Timestamp改为Date即可
public Object processArrayValue(Object value, JsonConfig jsonConfig)
{
String[] obj = {};
if (value instanceof Timestamp[])
{
SimpleDateFormat sf = new SimpleDateFormat(format);
Timestamp[] dates = (Timestamp[]) value;
obj = new String[dates.length];
for (int i = 0; i < dates.length; i++)
{
obj[i] = sf.format(dates[i]);
}
}
return obj;
}
public Object processObjectValue(String key, Object value, JsonConfig jsonConfig)
{
if (value instanceof Date)
{
String str = new SimpleDateFormat(format).format((Date) value);
return str;
}
return value;
}
public String getFormat()
{
return format;
}
public void setFormat(String format)
{
this.format = format;
}
}
测试类：
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Date;
import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;
public class test {
public static void main(String[] args) {
JsonConfig jsonConfig = new JsonConfig();
Person p = new Person();
p.setId(1);
p.setUsrname("zhangsan");
p.setBorthdate(new Timestamp(System.currentTimeMillis()));
jsonConfig.registerJsonValueProcessor(java.sql.Timestamp.class, new DateJsonValueProcessor());
JSONObject jsonObj = JSONObject.fromObject(p, jsonConfig);
System.out.println(jsonObj);
}
}
----------------------------------------------------------java类----PageModel----结束-----------------------------------------------------
----------------------------------------------------------action---开始-----------------------------------------------------
public class LsbzAction extends ActionSupport{
private PageNodel<User> page;
private boolean isajax;
//get.set方法
public String execute(){
this.page = lsbzDao.selectUserList(pageNo, pageSize);
if(isajax){
page.sendJsonData();
}
return success;
}
}
----------------------------------------------------------action----结束-----------------------------------------------------
---------------------------------------------------------dao层分页sql语句----开始-----------------------------------------------------
public class LsbzImpl extends JdbcTemplate implements LsbzDao{
private PageModel<User> page;
public void setPage(PageModel<LsbzVo> page){
this.page = page;
}
public PageModel<User> selectUserList(int pageNo, int pageSize) throws Exception{
StringBuffer sbsql = new StringBuffer();
sbsql.append("select id , username, age from ( ")
.append(" select rownum rn, id , username, age from( ")
.append(" select id, username, age from test order by id ")
.append(" ) where rownum <= " + (pageNo * pageSize))
.append(" ) where rn > " + (pageNo - 1) * pageSize);
//这里连接数据库是用spring的jdbcTemplate或者SimpleJdbcTemplate
List<User> list = this.queryForList(sbSql.toString(), LsbzVo.class, String.valueOf(page*pageSize), String.valueOf((pageNo-1) * pageSize));
this.page.setList(list);
this.page.setTotalRecords(getTotalRecords());
this.page.setPageSize(pageSize);
this.page.setPageNo(pageNo);
return this.page;
}
}
--------------------------------------------------------- dao层分页sql语句 ----结束-----------------------------------------------------
模拟数组分页：
---------------------------------------------------------数组分页----开始-----------------------------------------------------
package epurse.front.base;
import java.util.ArrayList;
import java.util.List;
public class Pagination {
private int maxPageLength = 10; // 页面最大记录数
private int currentPage = 1;// 当前页面数
private int maxLength = 0; // 总记录数
private int maxPage = 1; // 总页数
private List list; // 返回记录集
private List resultList; // 目标记录集
public List getResultList() {
return resultList;
}
public int getMaxPageLength() {
return maxPageLength;
}
public void setMaxPageLength(int maxPageLength) {
this.maxPageLength = maxPageLength;
}
public void setResultList(List resultList) {
this.resultList = resultList;
}
/**
* @author wxj
* @param resultList
* @return maxLength
*/
public int getMaxLength() {
if(this.resultList==null||this.resultList.isEmpty()){
maxLength = 0;
}
else{
maxLength = this.resultList.size();
}
return maxLength;
}
public int getMaxPage() {
int maxPage = getMaxLength() / this.maxPageLength;
if (getMaxLength() % this.maxPageLength != 0) {
maxPage = maxPage + 1;
}
return maxPage;
}
public List getList() {
List list = new ArrayList();
if(this.resultList!=null&&!this.resultList.isEmpty()){
int length;
if(getCurrentPage() == getMaxPage())
{
length = getMaxLength();
}
else
{
length = getCurrentPage() * getMaxPageLength();
}
for (int i = (currentPage-1) * getMaxPageLength(); i < length; i++) {
list.add(this.resultList.get(i));
}
}
return list;
}
public int getCurrentPage() {
return currentPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
}
---------------------------------------------------------数组分页----结束-----------------------------------------------------
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