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最新推荐文章于 2025-07-19 22:42:07 发布

原创最新推荐文章于 2025-07-19 22:42:07 发布 · 96 阅读

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#运维 #java

本文详细介绍了如何使用SSH框架实现数据的增删改查操作，并提供了相关代码示例，包括Java文件和JSP页面的实现，强调了在处理特定场景时的注意事项，如避免总页数能整除每页显示数量导致的末页显示问题。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

1、.java 文件

package test.s2sh;

public class Page {
private int start=0;
private int count=5;
private int total;

public int getStart() {
return start;
}
public void setStart(int start) {
this.start = start;
}
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}

public int getTotal() {
return total;
}
public void setTotal(int total) {
this.total = total;
}

public String toString() {

StringBuffer sb = new StringBuffer();
sb.append("<a href=?page.start=0>first</a>");
sb.append(" ");
sb.append("<a href=?page.start="
+ ((start - count) <= 0 ? 0 : (start - count)) + ">pre</a>");
sb.append(" ");
sb.append("<a href=?page.start=" + ((start + count)>=(total-(total % count ))?(total-(total % count )):(start + count)) + ">next</a>");
sb.append(" ");
sb.append("<a href=?page.start=" + (total-(total % count )) + ">last</a>");

return sb.toString();
}

}

要说出的是，这个有个小bug，当total能整除count时，最后页什么都没有。

没有bug的可以参考这个

package page;

public class ForPage {

public static String splitPage(int start ,int countPage){
StringBuffer sb = new StringBuffer();
if(1 != start){
sb.append("<a href='?start="+1+"'>首页</a>");
sb.append(" ");
sb.append("<a href='?start="+(start-1)+"'>上一页</a>");
sb.append(" ");
}else{
sb.append("首页上一页");
sb.append(" ");
}
sb.append("第"+start+"/"+countPage+"页");
sb.append(" ");
if(countPage != start){
sb.append("<a href='?start="+(start+1)+"'>下一页</a>");
sb.append(" ");
sb.append("<a href='?start="+countPage+"'>尾页</a>");
sb.append(" ");
}else{
sb.append("下一页尾页");
sb.append(" ");
}
sb.append("跳转到");
sb.append("<select id='page' onChange='change()'>");
for (int i = 1; i <= countPage; i++) {
sb.append("<option ");
if(start == i){
sb.append("selected");
}
sb.append(" value='"+i+"'>");
sb.append("第"+i+"页");
}
sb.append("</select>");
return sb.toString();
}

public static String splitPage(int id ,int start ,int countPage){
StringBuffer sb = new StringBuffer();
if(1 != start){
sb.append("<a href='?id="+id+"&start="+1+"'>首页</a>");
sb.append(" ");
sb.append("<a href='?id="+id+"&start="+(start-1)+"'>上一页</a>");
sb.append(" ");
}else{
sb.append("首页上一页");
sb.append(" ");
}
sb.append("第"+start+"/"+countPage+"页");
sb.append(" ");
if(countPage != start){
sb.append("<a href='?id="+id+"&start="+(start+1)+"'>下一页</a>");
sb.append(" ");
sb.append("<a href='?id="+id+"&start="+countPage+"'>尾页</a>");
sb.append(" ");
}else{
sb.append("下一页尾页");
sb.append(" ");
}
sb.append("跳转到");
sb.append("<input type='hidden' id='userId' value='"+id+"' />");
sb.append("<select id='page' onChange='change()'>");
for (int i = 1; i <= countPage; i++) {
sb.append("<option ");
if(start == i){
sb.append("selected");
}
sb.append(" value='"+i+"'>");
sb.append("第"+i+"页");
}
sb.append("</select>");
return sb.toString();
}
}

。

2、贴 jsp页面。（其他配置及相关struts.xml ,applicationContext.xml等未贴出。）

<%@ page language="java" contentType="text/html; charset=gbk"
pageEncoding="GBK"%>

<%@ taglib prefix="s" uri="/struts-tags"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>s2sh</title>

<style type="text/css">
td{
width:100px;
text-align:center
}
a.adduser{
position:relative;
left:700px
}

</style>

</head>
<body align="center">

<div>
<table align="center" cellspacing="0" border="1">

<tr bgcolor="#aaaaaa">

<td>userName</td>
<td>sex</td>
<td>address</td>
<td>age</td>
<td>update</td>
<td>delete</td>

</tr>

<s:iterator value="users">
<tr>

<td><s:property value="userName" /></td>
<td><s:property value="sex" /></td>
<td><s:property value="address" /></td>
<td><s:property value="age" /></td>
<td><a href="show?user.id=<s:property value="id" />">update</a></td>
<td><a href="delete?user.id=<s:property value="id" />">delete</a></td>
</tr>
</s:iterator>

<tr>
<td align="center" colspan="6"><s:property escape="false" value="page" /></td>
</tr>

</table>

<br/>
<br/>
<br/>
<a class="adduser" href="add">Add User</a>

</div>

<s:debug/>
</body>
</html>

今天完成了ssh的增删改查。

很多代码还要多写，多练。