JSP基于dom解析xml实例详解

这篇文章主要介绍了JSP基于dom解析xml的方法,以完整实例形式较为详细的分析了JSP使用dom针对xml文件解析的相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下

本文实例讲述了JSP基于dom解析xml的方法。分享给大家供大家参考，具体如下：

初次学习用dom操作xml文件，有很多不足之处，牛人多给点建议，练习时我没对中文做乱码处理，也没做验证哦！O(∩_∩)O~

实体类：User

 public class User { private String name; private String pwd; private String email; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPwd() { return pwd; } public void setPwd(String pwd) { this.pwd = pwd; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } }

数据访问层接口：UserDao

 public interface UserDao { boolean login(String name, String pwd); void insertUser(User user); List selectUser(); void updateUser(User user); boolean deleteUser(String name); public User findByName(String name); }

接口实现类：UserDaoImpl

 public class UserDaoImpl implements UserDao { private static final String PATH="xml文件路径"; private void build(Document dom) { try { //定义转换器 Transformer f = TransformerFactory.newInstance().newTransformer(); //设置输出的编码格式 f.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); //构建dom源 DOMSource source = new DOMSource(dom); //指定文件存放的目标路劲 StreamResult sr = new StreamResult(new File(PATH)); //执行转换操作 f.transform(source, sr); } catch (Exception e) { e.printStackTrace(); } } //登陆 public boolean login(String name, String pwd) { boolean flag = false; try { //根据以有的xml文件创建Document对象 Document dom = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new File(PATH)); //获取user节点下的子节点 NodeList list = dom.getElementsByTagName("user"); //遍历list，数据匹配退出 for(int i = 0; i users = this.selectUser(); for(int i = 0; i  selectUser() { List userList = new ArrayList(); try { //根据已有的xml文件创建dom Document dom = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(new File(PATH)); //获取所有user节点下的子节点 NodeList list = dom.getElementsByTagName("user"); for(int i = 0;i

业务逻辑层接口：UserService

 boolean login(String name, String pwd); void insertUser(User user); List selectUser(); void updateUser(User user); boolean deleteUser(String name); public User findByName(String name);

接口实现类：UserServiceImpl

 public class UserServiceImpl implements UserService { UserDao dao = new UserDaoImpl(); public boolean login(String name, String pwd) { return dao.login(name, pwd); } public void insertUser(User user) { dao.insertUser(user); } public List selectUser() { return dao.selectUser(); } public void updateUser(User user) { dao.updateUser(user); } public boolean deleteUser(String name) { return dao.deleteUser(name); } public User findByName(String name) { return dao.findByName(name); } }

控制层：UserAction

 public class UserAction extends ActionSupport{ private User user; public User getUser() { return user; } public void setUser(User user) { this.user = user; } UserService userService = new UserServiceImpl(); public String selectUser(){ HttpServletRequest request = ServletActionContext.getRequest(); List users = new ArrayList(); users = userService.selectUser(); request.setAttribute("USER", users); return "select"; } /** * 登陆 * @return */ public String login(){ if(user.getName() != null && user.getPwd() != null) { boolean flag = userService.login(user.getName(), user.getPwd()); if(flag) { return SUCCESS; } } return ERROR; } /** * 修改 * @return */ public String update(){ userService.updateUser(user); return "update"; } /** * 编辑 * @return */ public String edit(){ HttpServletRequest request = ServletActionContext.getRequest(); String name = request.getParameter("uName"); if(name != null) { User u = userService.findByName(name); request.setAttribute("USER", u); } return "edit"; } /** * 删除 * @return */ public String delete(){ HttpServletRequest request = ServletActionContext.getRequest(); String name = request.getParameter("uName"); boolean flag = userService.deleteUser(name); System.out.println(flag); return SUCCESS; } /** * 添加 * @return */ public String insert(){ userService.insertUser(user); return "insert"; } }

struts.xml配置（本人用的的struts2）：

     /list.jsp /list.action/login.jsp /list.action /list.action /list.action /update.jsp

web.xml配置

    index.jsp struts2 org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter  struts2/*

四个页面：login.jsp list.jsp insert.jsp,update.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="GBK"%><% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>  My JSP 'login.jsp' starting page 首页|注册    用户名： 
  密码：

list.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%@ taglib uri="/struts-tags" prefix="s"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%><% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>  My JSP 'list.jsp' starting page 注册   用户列表
 序号 用户名 密码 邮箱 删除 编辑
 ${temp.index+1} ${u.name } ${u.pwd } ${u.email} 删除 编辑

insert.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="GBK"%><% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %>  My JSP 'register.jsp' starting page 首页    用户名：  
  密码：  
  邮箱：

update.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="GBK"%><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %>  My JSP 'update.jsp' starting page 首页更新操作
    用户名： 
  密码： 
  邮箱：