java + dom4j.jar提取xml文檔內容

更新時間：2019年08月30日 10:27:12 作者：靜遠小和尚

這篇文章主要為大家詳細介紹了java + dom4j.jar提取xml文檔內容，具有一定的參考價值，感興趣的小伙伴們可以參考一下

本文實例為大家分享了java + dom4j.jar提取xml文檔內容的具體代碼，供大家參考，具體內容如下

資源下載頁：點擊下載

本例程主要借助幾個遍歷的操作對xml格式下的內容進行提取，操作不是最優(yōu)的方法，主要是練習使用幾個遍歷操作。

xml格式文檔內容：

<?xml version="1.0" encoding="UTF-8"?> 
<!DOCTYPE nitf SYSTEM "http://www.nitf.org/IPTC/NITF/3.3/specification/dtd/nitf-3-3.dtd"> 
-<nitf version="-//IPTC//DTD NITF 3.3//EN" change.time="19:30" change.date="June 10, 2005">
 
 
-<head>
 
<title>An End to Nuclear Testing</title>
 
<meta name="publication_day_of_month" content="7"/> 
<meta name="publication_month" content="7"/> 
<meta name="publication_year" content="1993"/> 
<meta name="publication_day_of_week" content="Wednesday"/> 
<meta name="dsk" content="Editorial Desk"/> 
<meta name="print_page_number" content="14"/> 
<meta name="print_section" content="A"/> 
<meta name="print_column" content="1"/>
<meta name="online_sections" content="Opinion"/>
 
 
-<docdata>
 
<doc-id id-string="619929"/>
 
<doc.copyright year="1993" holder="The New York Times"/>
 
 
-<identified-content>
 
<classifier type="descriptor" class="indexing_service">ATOMIC WEAPONS</classifier> 
<classifier type="descriptor" class="indexing_service">NUCLEAR TESTS</classifier> 
<classifier type="descriptor" class="indexing_service">TESTS AND TESTING</classifier> 
<classifier type="descriptor" class="indexing_service">EDITORIALS</classifier> 
<person class="indexing_service">CLINTON, BILL (PRES)</person> 
<classifier type="types_of_material" class="online_producer">Editorial</classifier> 
<classifier type="taxonomic_classifier" class="online_producer">Top/Opinion</classifier> 
<classifier type="taxonomic_classifier" class="online_producer">Top/Opinion/Opinion</classifier> 
<classifier type="taxonomic_classifier" class="online_producer">Top/Opinion/Opinion/Editorials</classifier> 
<classifier type="general_descriptor" class="online_producer">Nuclear Tests</classifier> 
<classifier type="general_descriptor" class="online_producer">Atomic Weapons</classifier> 
<classifier type="general_descriptor" class="online_producer">Tests and Testing</classifier> 
<classifier type="general_descriptor" class="online_producer">Armament, Defense and Military Forces</classifier>
 
</identified-content> 
</docdata> 
<pubdata name="The New York Times" unit-of-measure="word" item-length="390" ex-ref="http://query.nytimes.com/gst/fullpage.html?res=9F0CEFDF1439F934A35754C0A965958260" date.publication="19930707T000000"/>
 
</head>
 
 
-<body>
 
 
-<body.head>
 
 
-<hedline>
 
<hl1>An End to Nuclear Testing</hl1>
 
</hedline> 
</body.head>
 
 
-<body.content>
 
 
-<block class="lead_paragraph">
 
<p>For nearly half a century, test explosions in the Nevada desert were a reverberating reminder of cold war insecurity. Now the biggest worry is nuclear proliferation, not the Soviet threat. That's why President Clinton has quietly decided to extend the moratorium on tests of nuclear arms for at least 15 months.</p> 
<p>To persuade nuclear have-nots to stay out of the bomb-making business, it makes more sense to halt testing and try to get others to do likewise than to conduct more demonstrations of America's deterrent power.</p>
 
</block>
 
 
-<block class="full_text">
 
<p>For nearly half a century, test explosions in the Nevada desert were a reverberating reminder of cold war insecurity. Now the biggest worry is nuclear proliferation, not the Soviet threat. That's why President Clinton has quietly decided to extend the moratorium on tests of nuclear arms for at least 15 months.</p>
<p>To persuade nuclear have-nots to stay out of the bomb-making business, it makes more sense to halt testing and try to get others to do likewise than to conduct more demonstrations of America's deterrent power.</p> 
<p>Not that nuclear wannabes will necessarily follow America's lead. Nor will an end to all testing assure an end to bomb-making; states like Pakistan have developed nuclear devices without testing them first.</p>
<p>But calling a halt to U.S. nuclear testing makes it easier for leaders in Russia and France to extend the moratoriums they are now observing and improve the atmosphere for prompt negotiation of a treaty to ban all tests.</p>
<p>That test ban in turn should shore up international support for the 1968 Nonproliferation Treaty, linchpin of efforts to stop the spread of nuclear arms, when it comes up for review in 1995. It will also bolster the backing for tighter controls on exports used in bomb-making.</p>
<p>Mr. Clinton has taken three helpful steps. He has extended the Congressionally mandated moratorium on U.S. tests that was due to expire last week. He has declared that the U.S. will not test unless another nation does so first. And he wants to negotiate a total ban on testing.</p>
<p>But the President also wants the nuclear labs to be prepared for a prompt resumption of warhead safety and reliability tests. This could cost millions of dollars and doesn't make much sense, since in Mr. Clinton's own words, "After a thorough review, my Administration has determined that the nuclear weapons in the United States' arsenal are safe and reliable."</p>
<p>Moreover, preparations for testing can take on a life of their own: 30 years after the Limited Test Ban Treaty put an end to above-ground tests, the U.S. still spends $20 million a year on Safeguard C, a program to keep test sites ready.</p>
<p>American security no longer rests on that sort of eternal nuclear vigilance. Mr. Clinton's moratorium may make America safer than all the tests and preparations for tests that the nuclear labs can dream up.</p>
 
</block>
 
</body.content>
 
</body>
 
</nitf>

提取代碼：

對多文件進行操作，首先遍歷所有文件路徑，存到遍歷器中，然后對遍歷器中的文件路徑進行逐一操作。

package com.njupt.ymh;
 
import java.io.File;
import java.util.ArrayList;
import java.util.List;
 
import edu.princeton.cs.algs4.In;
 
/**
 * 返回文件名列表
 * @author 11860
 *
 */
public class SearchFile {
 
 public static List<String> getAllFile(String directoryPath,boolean isAddDirectory) {
  List<String> list = new ArrayList<String>(); // 存放文件路徑
  File baseFile = new File(directoryPath); // 當前路徑
  
  if (baseFile.isFile() || !baseFile.exists()) 
   return list;
  
  File[] files = baseFile.listFiles(); // 子文件
  for (File file : files) {
   if (file.isDirectory()) 
   { 
    if(isAddDirectory) // isAddDirectory 是否將子文件夾的路徑也添加到list集合中
     list.add(file.getAbsolutePath()); // 全路徑
    
    list.addAll(getAllFile(file.getAbsolutePath(),isAddDirectory));
   } 
   else 
   {
    list.add(file.getAbsolutePath());
   }
  }
  return list;
 }
 public static void main(String[] args) {
 
 //SearchFile sFile = new SearchFile();
 List<String> listFile = SearchFile.getAllFile("E:\\huadai", false);
 System.out.println(listFile.size());
 File file = new File(listFile.get(3));
 In in = new In(listFile.get(4));
 while (in.hasNextLine()) {
 String readLine = in.readLine().trim(); // 讀取當前行
 System.out.println(readLine);
 
 }
 System.out.println(file.length());
 
 }
 
}

package com.njupt.ymh;
 
import java.io.File;
import java.util.Iterator;
import java.util.List;
 
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
 
public class NewsPaper {
 int doc_id; // 文章id
 String doc_title; // 文章標題
 String lead_paragraph ; // 文章首段
 String full_text; // 文章內容
 String date; // 文章日期
 public NewsPaper(String xml) {
 doc_id = -1; // 文章id
 doc_title = null; // 文章標題
 lead_paragraph = null; // 文章首段
 full_text = null; // 文章內容
 date = null; // 文章日期
 searchValue(xml);
 }
 
 /**
 * 加載Document文件
 * @param fileName
 * @return Document
 */
 private Document load(String fileName) {
 Document document = null; // 文檔
 SAXReader saxReader = new SAXReader(); // 讀取文件流
 
 try {
 document = saxReader.read(new File(fileName));
 } catch (DocumentException e) {
 e.printStackTrace();
 }
 
 return document;
 }
 
 /**
 * 獲取Document的根節(jié)點
 * @param args
 */
 private Element getRootNode(Document document) {
 return document.getRootElement();
 }
 
 /**
 * 獲取所需節(jié)點值
 * @param xml
 */
 private void searchValue(String xml) {
 Document document = load(xml);
  Element root = getRootNode(document); // 根節(jié)點 
  
  // 文章日期
  date = xml.substring(10, 20);
  // 文章標題
  doc_title = root.valueOf("http://head/title");
  
  // 文章-id
  List<Node> list_doc_id = document.selectNodes("http://doc-id/@id-string"); 
  for(Node ele:list_doc_id){
   doc_id = Integer.parseInt(ele.getText());
  }
  
  // 文章內容
  for (Iterator<Element> i = root.elementIterator(); i.hasNext();) { 
   Element el = (Element) i.next(); // head、body
   
   // 對body節(jié)點進行操作
   if (el.getName() == "body") { // body
    for (Iterator<Element> body = el.elementIterator(); body.hasNext();) {
  Element elbody = body.next();
  
  if (elbody.getName() == "body.content") { //body.content
  for (Iterator<Element> block = elbody.elementIterator(); block.hasNext();) {
  Element block_class = (Element) block.next();
  
  if (block_class.attributeValue("class").equals("full_text") ) { // full_text
  List<Node> list_text = block_class.selectNodes("p");
  for (Node text : list_text) 
   if (full_text == null) 
   full_text = text.getStringValue();
   else 
   full_text = full_text +" " + text.getStringValue();
  }
  
  else { // lead_paragraph
  List<Node> list_lead = block_class.selectNodes("p");
  for (Node lead : list_lead) 
   if (lead_paragraph == null)
   lead_paragraph = lead.getStringValue();
   else 
   lead_paragraph = lead_paragraph +" "+ lead.getStringValue();
  }
  }
  }
 }
   }
  } 
 }
 
 /**
 * 獲取文章標題
 * @param args
 */
 public String getTitle() {
 return doc_title;
 }
 
 /**
 * 獲取文章id
 * @param args
 */
 public int getID() {
 return doc_id;
 }
 
 /**
 * 獲取文章簡介
 * @param args
 */
 public String getLead() {
 if (getID() < 394070 && lead_paragraph != null && lead_paragraph.length() > 6)  //1990-10-22之前
 return lead_paragraph.substring(6);
 else       //1990-10-22之后
 return lead_paragraph;
 }
 
 /**
 * 獲取文章正文
 * @param args
 */
 public String getfull() {
 if (getID() < 394070 && full_text != null && full_text.length() > 6)   //1990-10-22之前
 return full_text.substring(6);
 else
 return full_text;
 }
 
 /**
 * 獲取文章日期
 * @param args
 */
 public String getDate() {
 return date;
 }
 
 /**
 * 判斷獲取的信息是否有用
 * @return
 */
 public boolean isUseful() {
 if (getID() == -1)
 return false;
 if (getDate() == null ) 
 return false;
 if (getTitle() == null || getTitle().length() >= 255) 
 return false;
 if (getLead() == null || getLead().length() >= 65535 ) 
 return false;
 if (getfull() == null || getfull().length() >= 65535) 
 return false;
 
 return !isnum();
 }
 
 /**
 * 挑出具有特殊開頭的數字內容文章
 * @return
 */
 private boolean isnum() {
 if (getfull() != null && getfull().length() > 24) {
 if (getfull().substring(0, 20).contains("*3*** COMPANY REPORT") ) { // 剔除數字文章 
 return true;
 }
 }
 return false;
 }
 
 
 public static void main(String[] args) {
 List<String> listFile = SearchFile.getAllFile("E:\\huadai\\1989\\10", false); // 文件列表
 //String date; // 日期
 int count = 0;
 int i = 0;
 for (String string : listFile) {
 NewsPaper newsPaper = new NewsPaper(string);
 count++;
 if (!newsPaper.isUseful()) {
 i++;
 System.out.println(newsPaper.getLead());
 } 
 }
 
 System.out.println(i + " "+ count);
 
 }
}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。

您可能感興趣的文章: