struts代码（strut）

今天给各位分享struts代码的知识，其中也会对strut进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！

本文目录一览：

• 1、jsp代码如何转化为struts代码
• 2、struts分页代码
• 3、java web中struts框架的具体代码是什么
• 4、哪位大虾给解释一下下面的struts代码？

jsp代码如何转化为struts代码

用struts标签是么???

jsp中用struts标签就好了啊

jsp开始写上这句

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

导入struts的jar包.

然后配置好了,就可以用了

struts分页代码

OKOK分页实例代码

1 Book.java

package bean;

import java.sql.*;

import java.util.ArrayList;

/**

* Struts分页显示数据Bean，对应数据库中Book表

*/

public class Book {

private String bookname; //书名

private String author; //作者

private String price; //价格

public Book(String name,String author,String price){

this.bookname=name;

this.author=author;

this.price=price;

}

public String getAuthor() {

return author;

}

public void setAuthor(String author) {

this.author = author;

}

public String getBookname() {

return bookname;

}

public void setBookname(String bookname) {

this.bookname = bookname;

}

public String getPrice(){

return this.price;

}

public void setPrice(String price){

this.price=price;

}

public static ArrayList getAllBook(Connection connection){

String sql="select * from book";

ArrayList arrayList = new ArrayList();

try{

Statement statement = connection.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);

ResultSet resultSet = statement.executeQuery(sql);

System.out.println("BookBean 数据查询已完成！");

while(resultSet.next())

{

String name = resultSet.getString("name");

String author = resultSet.getString("author");

String price = resultSet.getString("price");

System.out.println("开始数据封装：name="+name+"author="+author+"price="+price);

Book book = new Book(name,author,price);

arrayList.add(book);

}

connection.close();

resultSet.close();

}catch(SQLException e)

{

System.out.println("数据库异常"+e.toString());

}

return arrayList;

}

}

2 PageBean.java

package page;

import bean.Book;

import java.util.*;

/**

* Struts分页显示逻辑Bean

*/

public class PageBean {

int currentPage=1; //当前页

public int totalPages=0; //总页数

int pageRecorders=5;//每页5条数据

int totalRows=0; //总数据数

int pageStartRow=0;//每页的起始数

int pageEndRow=0; //每页显示数据的终止数

boolean hasNextPage=false; //是否有下一页

boolean hasPreviousPage=false; //是否有前一页

ArrayList arrayList;

Iterator it;

public PageBean(){}

public PageBean(ArrayList arrayList){

this.arrayList=arrayList;

totalRows=arrayList.size();

it=arrayList.iterator();

hasPreviousPage=false;

currentPage=1;

if((totalRows%pageRecorders)==0)

{

totalPages=totalRows/pageRecorders;

}

else

{

totalPages=totalRows/pageRecorders+1;

}

if(currentPage=totalPages)

{

hasNextPage=false;

}

else

{

hasNextPage=true;

}

if(totalRowspageRecorders)

{

this.pageStartRow=0;

this.pageEndRow=totalRows;

}

else

{

this.pageStartRow=0;

this.pageEndRow=pageRecorders;

}

}

/**

* @return Returns the currentPage.

*/

public String getCurrentPage() {

return this.toString(currentPage);

}

/**

* @param currentPage The currentPage to set.

*/

public void setCurrentPage(int currentPage) {

this.currentPage = currentPage;

}

/**

* @return Returns the pageRecorders.

*/

public int getPageRecorders() {

return pageRecorders;

}

/**

* @param pageRecorders The pageRecorders to set.

*/

public void setPageRecorders(int pageRecorders) {

this.pageRecorders = pageRecorders;

}

/**

* @return Returns the pageEndRow.

*/

public int getPageEndRow() {

return pageEndRow;

}

/**

* @return Returns the pageStartRow.

*/

public int getPageStartRow() {

return pageStartRow;

}

/**

* @return Returns the totalPages.

*/

public String getTotalPages() {

return this.toString(totalPages);

}

/**

* @return Returns the totalRows.

*/

public String getTotalRows() {

return this.toString(totalRows);

}

/**

* @return Returns the hasNextPage.

*/

public boolean isHasNextPage() {

return hasNextPage;

}

/**

* @param hasNextPage The hasNextPage to set.

*/

public void setHasNextPage(boolean hasNextPage) {

this.hasNextPage = hasNextPage;

}

/**

* @return Returns the hasPreviousPage.

*/

public boolean isHasPreviousPage() {

return hasPreviousPage;

}

/**

* @param hasPreviousPage The hasPreviousPage to set.

*/

public void setHasPreviousPage(boolean hasPreviousPage) {

this.hasPreviousPage = hasPreviousPage;

}

public Book[] getNextPage(){

currentPage=currentPage+1;

System.out.println("PageBean.getNextPage()正在执行；");

System.out.println("参数currentPage="+currentPage);

if((currentPage-1)0)

{

hasPreviousPage=true;

}

else

{

hasPreviousPage=false;

}

if(currentPage=totalPages)

{

hasNextPage=false;

}

else

{

hasNextPage=true;

}

System.out.println("参数hasNextPage="+hasNextPage);

System.out.println("准备执行PageBean.getBooks()");

Book[] books=getBooks();

this.description();

return books;

}

public Book[] getPreviouspage(){

currentPage=currentPage-1;

if(currentPage==0){currentPage=1;}

if(currentPage=totalPages)

{

hasNextPage=false;

}

else

{

hasNextPage=true;

}

if((currentPage-1)0)

{

hasPreviousPage=true;

}

else

{

hasPreviousPage=false;

}

Book[] books=getBooks();

this.description();

return books;

}

public Book[] getBooks(){

System.out.println("pageBean.getBooks（）开始执行；");

if(currentPage*pageRecorderstotalRows){//判断是否为最后一页

pageEndRow=currentPage*pageRecorders;

pageStartRow=pageEndRow-pageRecorders;

}

else{

pageEndRow=totalRows;

pageStartRow=pageRecorders*(totalPages-1);

}

Book[] books=new Book[pageEndRow-pageStartRow+1];

System.out.println("pageStartRow="+pageStartRow);

System.out.println("pageEndRow="+pageEndRow);

int j=0;

for(int i=pageStartRow;ipageEndRow;i++)

{

Book book=(Book)arrayList.get(i);

books[j++]=book;

}

System.out.println("要显示的页面数据已经封装,具体信息如下：");

this.description();

return books;

}

public String toString(int temp)

{

String str=Integer.toString(temp);

return str;

}

public void description()

{

String description="共有数据数:"+this.getTotalRows()+

"共有页数: "+this.getTotalPages() +

"当前页数为:"+this.getCurrentPage()+

" 是否有前一页: "+this.isHasPreviousPage() +

" 是否有下一页:"+this.isHasNextPage()+

" 开始行数:"+this.getPageStartRow()+

" 终止行数:"+this.getPageEndRow();

System.out.println(description);

}

}

3 PageListAction.java

package page;

import org.apache.struts.action.*;

import javax.servlet.http.*;

import comm.Constants;

import bean.Book;

import java.util.*;

import javax.sql.DataSource;

/**

* Struts分页显示Action

*/

public class PageListAction extends Action {

public PageListAction(){}

ArrayList arrayList=new ArrayList();

PageBean pb;

public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {

String action;

action=request.getParameter("action");

if(action==null || action.equals("null")){ //第一次读取数据

try{

DataSource datasource=this.getDataSource(request,Constants.DATASOURCE_KEY);

arrayList=Book.getAllBook(datasource.getConnection());

System.out.println("第一步，数据已经成功传递到Action，action="+action);

}catch(Exception e){

e.printStackTrace();

System.out.println("数据库连接出现异常");

}

pb=new PageBean(arrayList);

Book[] books=pb.getBooks();

pb.description();

request.setAttribute("result",books);

request.setAttribute("page",pb);

}

else

{

if(action=="nextPage" || action.equals("nextPage"))

{

System.out.println("参数action="+action);

System.out.println("函数pb.getNextPage()准备执行");

Book[]books=pb.getNextPage();

request.setAttribute("page",pb);

request.setAttribute("result",books);

}

if(action=="previousPage" || action.equals("previousPage"))

{

System.out.println("参数action="+action);

System.out.println("函数pb.getPreviouspage()准备执行");

Book[] books=pb.getPreviouspage();

request.setAttribute("page",pb);

request.setAttribute("result",books);

}

}

return (mapping.findForward("success"));

}

}

4 pagetest.jsp

%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %

%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %

%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %

%@ page contentType="text/html; charset=gb2312" language="java"%

html:html locale="true"

head

meta http-equiv="Content-Type" content="text/html; charset=gb2312"

/head

body

table border="1"

trth书名/thth作者/thth价格/th/tr

logic:present name="result"

logic:iterate id="book" name="result" type="bean.Book"

logic:present name="book"

tr

tdbean:write name="book" property="bookname" //td

td bean:write name="book" property="author" //td

tdbean:write name="book" property="price" //td

/tr

/logic:present

/logic:iterate

/logic:present

/table

logic:equal name="page" property="hasNextPage" value="true"

html:link page="/page.do?action=nextPage"nextPage/html:link

/logic:equal

logic:equal name="page" property="hasPreviousPage" value="true"

html:link page="/page.do?action=previousPage"PreviousPage/html:link

/logic:equal

共有数据总数bean:write name="page" property="totalRows"/;

共分bean:write name="page" property="totalPages"/页,当前是第

bean:write name="page" property="currentPage"/页

/body

/html:html

5 struts-config.xml

?xml version="1.0" encoding="ISO-8859-1" ?

!DOCTYPE struts-config PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 1.1//EN"

""

struts-config

data-sources

data-source key="dataSource" type="org.apache.commons.dbcp.BasicDataSource"

set-property property="driverClassName" value="com.microsoft.jdbc.sqlserver.SQLServerDriver"/

set-property property="url" value="jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=eBookStore;SelectMethod=cursor"/

set-property property="username" value="limq"/

set-property property="password" value="1"/

set-property property="maxActive" value="10"/

set-property property="maxWait" value="5000"/

set-property property="defaultAutoCommit" value="true"/

set-property property="defaultReadOnly" value="false"/

/data-source

/data-sources

form-beans

/form-beans

global-forwards

/global-forwards

action-mappings

action path="/page" type="page.PageListAction" scope="request"

forward name="success" path="/pagetest.jsp"/

/action

/action-mappings

controller

/controller

/struts-config

6 建立eBookStore数据库，以及表book（name,author,parce）;其中数据的配置可以根据你的不同情况在struts-config.xml中而定。

7 Constants.java

package comm;

/**

* this interface provides the constant string for applicator constant

*/

public class Constants {

/**

* name of the User Object in HttpSession

*/

public static String USER_KEY="user";

/**

* dataSource name

*/

public static String DATASOURCE_KEY="dataSource";

}

java web中struts框架的具体代码是什么

struts的作用主要是搭建多层框架（一般是3层），struts没有什么代码，只是几个配置文件，按照3层框架一层引用一层的情况搭配的

例如：

bean name="loginAction" class="com.hanqian.action.LoginAction"

property name="loginBusiness" ref="loginBusiness" /

/bean

bean id="loginBusiness" class="com.hanqian.business.LoginBusiness"

property name="loginMgr" ref="loginMgr" /

/bean

bean id="loginMgr" class="com.hanqian.manager.LoginMgr"

property name="userDao" ref="DbUsersDAO" /

/bean

哪位大虾给解释一下下面的struts代码？

1.获得session ，java有2种方法。

request.getSession(true);

request.getServletContext().getSession();

2.转发。mapping.findForward("welcome");

这里需要看 WEB-INF/strutsConfig.xml 文件。

action path="/search"

type="addressbook.actions.SearchAction"

name="searchForm"

scope="request"

validate="true"

input="/search.jsp"

forward name="welcome" path="/display.jsp"/

!--看到没有，这里就是转发到哪里去--

/action

struts代码的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于strut、struts代码的信息别忘了在本站进行查找喔。