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【XML配置文件读取】使用jdom读取XML配置文件信息

时间：2015-11-10 22:31:12      阅读：270      评论：0      收藏：0      [点我收藏+]

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在项目中我们经常需要将配置信息写在配置文件中，而XML配置文件是常用的格式。
下面将介绍如何通过jdom来读取xml配置文件信息。

配置文件信息

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  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <config>
  3.     <base-config>
  4. 	     <stringValue>Hello world</stringValue>
  5. 		 <integerValue>8</integerValue>
  6. 		 <longValue>32768</longValue>
  7. 	</base-config>
  8. 	
  9. 	<books>
  10.         <book id="111"> 
  11.             <name>Java 编程</name>
  12. 			<price>33</price>            
  13.         </book>
  14.         <book id="222">
  15.             <name>Spring学习指南</name>
  16.             <price>55</price>
  17.         </book>
  18.     </books>
  19.       
  20.     <computers>
  21.         <computer type="dell" size="14寸" />
  22.         <computer type="thinkpad" size="16寸" />
  23.         <computer type="apple" size="22寸" />
  24.     </computers>
  25. </config>

需要的Jar包（MAVEN给出）

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完整的POM文件

  1. <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  2. 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  3. 	<modelVersion>4.0.0</modelVersion>
  5. 	<groupId>com.ll</groupId>
  6. 	<artifactId>myThreadStudy</artifactId>
  7. 	<version>0.0.1-SNAPSHOT</version>
  8. 	<packaging>jar</packaging>
  10. 	<name>myThreadStudy</name>
  11. 	<url>http://maven.apache.org</url>
  13. 	<properties>
  14. 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  15. 		<junitVersion>3.8.1</junitVersion>
  16. 		<commons-io-Version>2.4</commons-io-Version>
  17. 		<jaxenVersion>1.1.1</jaxenVersion>
  18. 		<jdomVersion>1.1</jdomVersion>
  19. 		<log4jVersion>1.2.17</log4jVersion>
  20. 	</properties>
  22. 	<dependencies>
  23. 		<dependency>
  24. 			<groupId>junit</groupId>
  25. 			<artifactId>junit</artifactId>
  26. 			<version>${junitVersion}</version>
  27. 			<scope>test</scope>
  28. 		</dependency>
  30. 		<dependency>
  31. 			<groupId>commons-io</groupId>
  32. 			<artifactId>commons-io</artifactId>
  33. 			<version>${commons-io-Version}</version>
  34. 		</dependency>
  35. 		<dependency>
  36. 			<groupId>org.jdom</groupId>
  37. 			<artifactId>jdom</artifactId>
  38. 			<version>${jdomVersion}</version>
  39. 		</dependency>
  40. 		<dependency>
  41. 			<groupId>log4j</groupId>
  42. 			<artifactId>log4j</artifactId>
  43. 			<version>${log4jVersion}</version>
  44. 		</dependency>
  45. 		<dependency>
  46.             <groupId>jaxen</groupId>
  47.             <artifactId>jaxen</artifactId>
  48.             <version>${jaxenVersion}</version>
  49.         </dependency>
  50. 	</dependencies>
  52. 	<build>
  53. 		<defaultGoal>install</defaultGoal>
  55. 		<plugins>
  56. 			<plugin>
  57. 				<groupId>org.apache.maven.plugins</groupId>
  58. 				<artifactId>maven-compiler-plugin</artifactId>
  59. 				<version>2.5.1</version>
  60. 				<configuration>
  61. 					<source>1.7</source>
  62. 					<target>1.7</target>
  63. 					<encoding>UTF-8</encoding>  <!-- “编码 GBK 的不可映射字符”问题的解决 -->
  64. 				</configuration>
  65. 			</plugin>
  66. 		</plugins>
  67. 	</build>
  69. </project>

通用的XML操作类（XMLOperatorUtils.java）

  1. package com.ll.myThreadStudy.MyThread;
  3. import java.util.List;
  5. import org.jdom.Element;
  6. import org.jdom.JDOMException;
  7. import org.jdom.xpath.XPath;
  9. public class XMLOperatorUtils {
  11. 	public static String getElementAttributeStringValue(Element element,
  12. 			String AttributeName) {
  13. 		try {
  14. 			return element.getAttributeValue(AttributeName);
  15. 		} catch (Exception e) {
  16. 			return null;
  17. 		}
  18. 	}
  20. 	public static Integer getElementAttributeIntegerValue(Element element,
  21. 			String AttributeName) {
  22. 		try {
  23. 			return Integer.parseInt(getElementAttributeStringValue(element,
  24. 					AttributeName));
  25. 		} catch (Exception e) {
  26. 			return -1;
  27. 		}
  28. 	}
  30. 	public static Long getElementAttributeLongValue(Element element,
  31. 			String AttributeName) {
  32. 		try {
  33. 			return Long.parseLong(getElementAttributeStringValue(element,
  34. 					AttributeName));
  35. 		} catch (Exception e) {
  36. 			return -1l;
  37. 		}
  38. 	}
  40. 	public static Boolean getElementAttributeBooleanValue(Element element,
  41. 			String AttributeName) {
  42. 		try {
  43. 			return Boolean.parseBoolean(getElementAttributeStringValue(element,
  44. 					AttributeName));
  45. 		} catch (Exception e) {
  46. 			return false;
  47. 		}
  48. 	}
  50. 	public static String getElementTextStringValueFromRoot(Element rootEle,
  51. 			String path) {
  52. 		try {
  53. 			return ((Element) getSingleNode(rootEle, path)).getTextTrim();
  54. 		} catch (Exception e) {
  55. 			return null;
  56. 		}
  57. 	}
  59. 	public static Integer getElementTextIntegerValueFromRoot(Element rootEle,
  60. 			String path) {
  61. 		try {
  62. 			return Integer.parseInt(getElementTextStringValueFromRoot(rootEle,
  63. 					path));
  64. 		} catch (Exception e) {
  65. 			return -1;
  66. 		}
  67. 	}
  69. 	public static Long getElementTextLongValueFromRoot(Element rootEle,
  70. 			String path) {
  71. 		try {
  72. 			return Long.parseLong(getElementTextStringValueFromRoot(rootEle,
  73. 					path));
  74. 		} catch (Exception e) {
  75. 			return -1l;
  76. 		}
  77. 	}
  79. 	public static Boolean getElementTextBooleanValueFromRoot(Element rootEle,
  80. 			String path) {
  81. 		try {
  82. 			return Boolean.parseBoolean(getElementTextStringValueFromRoot(
  83. 					rootEle, path));
  84. 		} catch (Exception e) {
  85. 			return false;
  86. 		}
  87. 	}
  89. 	public static String getElementTextStringValueByElement(Element element,
  90. 			String childName) {
  91. 		try {
  92. 			return element.getChildText(childName);
  93. 		} catch (Exception e) {
  94. 			return null;
  95. 		}
  96. 	}
  98. 	protected static Integer getElementTextIntegerValueByElement(
  99. 			Element element, String childName) {
  100. 		try {
  101. 			return Integer.parseInt(getElementTextStringValueByElement(element,
  102. 					childName));
  103. 		} catch (Exception e) {
  104. 			return -1;
  105. 		}
  106. 	}
  108. 	protected static Long getElementTextLongValueByElement(Element element,
  109. 			String childName) {
  110. 		try {
  111. 			return Long.parseLong(getElementTextStringValueByElement(element,
  112. 					childName));
  113. 		} catch (Exception e) {
  114. 			return -1l;
  115. 		}
  116. 	}
  118. 	protected static Boolean getElementTextBooleanValueByElement(
  119. 			Element element, String childName) {
  120. 		try {
  121. 			return Boolean.parseBoolean(getElementTextStringValueByElement(
  122. 					element, childName));
  123. 		} catch (Exception e) {
  124. 			return false;
  125. 		}
  126. 	}
  128. 	protected static Object getSingleNode(Element rootEle, String path)
  129. 			throws JDOMException {
  130. 		return XPath.selectSingleNode(rootEle, path);
  131. 	}
  133. 	@SuppressWarnings("rawtypes")
  134. 	protected static List getNodes(Element rootEle, String path)
  135. 			throws JDOMException {
  136. 		return XPath.selectNodes(rootEle, path);
  137. 	}
  138. }

读取配置文件到Java POJO

  1. package com.ll.myThreadStudy.MyThread;
  3. import java.io.File;
  4. import java.util.ArrayList;
  5. import java.util.HashMap;
  6. import java.util.List;
  8. import org.apache.log4j.Logger;
  9. import org.jdom.Element;
  10. import org.jdom.input.SAXBuilder;
  11. import org.jdom.xpath.XPath;
  13. public class XmlToConfigVO {
  14.     private static Logger logger = Logger.getLogger(XmlToConfigVO.class);
  16.     public static MyConfigVo getLogSystemConfigVO(String fileName) {
  17.         try {
  18.             Element rootEle = new SAXBuilder().build(new File(fileName))
  19.                     .getRootElement();
  20.             MyConfigVo myConfigVo = new MyConfigVo();
  21.             
  22.             //获取单个节点值的内容
  23.             myConfigVo.setStringValue(XMLOperatorUtils
  24.                     .getElementTextStringValueFromRoot(rootEle,
  25.                             "/config/base-config/stringValue"));
  26.             myConfigVo.setIntegerValue(XMLOperatorUtils
  27.                     .getElementTextIntegerValueFromRoot(rootEle,
  28.                             "/config/base-config/integerValue"));
  29.             myConfigVo.setLongValue(XMLOperatorUtils
  30.                     .getElementTextLongValueFromRoot(rootEle,
  31.                             "/config/base-config/longValue"));
  32.             
  33.             //获取多个节点值
  34.             HashMap<Integer, BookVo> booksMap = new HashMap<Integer, BookVo>();
  35.             for (Object element : XPath.selectNodes(rootEle,"/config/books/book")) {
  36.             	BookVo book = new BookVo();
  37.             	book.setId(XMLOperatorUtils.getElementAttributeIntegerValue((Element) element,"id"));
  38.             	book.setName(XMLOperatorUtils.getElementTextStringValueByElement((Element) element,"name"));
  39.             	book.setPrice(XMLOperatorUtils.getElementTextLongValueByElement((Element) element,"price"));
  40.             	booksMap.put(book.getId(),book);
  41.             }
  42.             myConfigVo.setBooksMap(booksMap);
  43.             
  44.             List<ComputerVo> computerList= new ArrayList<ComputerVo>();
  45.             for (Object element : XPath.selectNodes(rootEle,"/config/computers/computer")) {
  46.             	ComputerVo computer = new ComputerVo();
  47.             	computer.setType(XMLOperatorUtils.getElementAttributeStringValue((Element) element, "type"));
  48.             	computer.setSize(XMLOperatorUtils.getElementAttributeStringValue((Element) element,"size"));
  49.             	computerList.add(computer);
  50.             }
  51.             myConfigVo.setComputerList(computerList);
  52.             return myConfigVo;
  53.         } catch (Exception e) {
  54.             logger.error(e);
  55.         }
  56.         return null;
  57.     }
  59. }

完整程序

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  1. package com.ll.myThreadStudy.MyThread;
  3. import java.util.ArrayList;
  4. import java.util.HashMap;
  5. import java.util.List;
  7. public class MyConfigVo {
  8. 	private String stringValue;
  9. 	private Integer integerValue;
  10. 	private Long longValue;
  11. 	private HashMap<Integer, BookVo> booksMap = new HashMap<Integer, BookVo>();
  12. 	private List<ComputerVo> computerList = new ArrayList<ComputerVo>();
  14. 	public String getStringValue() {
  15. 		return stringValue;
  16. 	}
  18. 	public void setStringValue(String stringValue) {
  19. 		this.stringValue = stringValue;
  20. 	}
  22. 	public Integer getIntegerValue() {
  23. 		return integerValue;
  24. 	}
  26. 	public void setIntegerValue(Integer integerValue) {
  27. 		this.integerValue = integerValue;
  28. 	}
  30. 	public Long getLongValue() {
  31. 		return longValue;
  32. 	}
  34. 	public void setLongValue(Long longValue) {
  35. 		this.longValue = longValue;
  36. 	}
  38. 	public HashMap<Integer, BookVo> getBooksMap() {
  39. 		return booksMap;
  40. 	}
  42. 	public void setBooksMap(HashMap<Integer, BookVo> booksMap) {
  43. 		this.booksMap = booksMap;
  44. 	}
  46. 	public List<ComputerVo> getComputerList() {
  47. 		return computerList;
  48. 	}
  50. 	public void setComputerList(List<ComputerVo> computerList) {
  51. 		this.computerList = computerList;
  52. 	}
  54. 	@Override
  55. 	public int hashCode() {
  56. 		final int prime = 31;
  57. 		int result = 1;
  58. 		result = prime * result
  59. 				+ ((booksMap == null) ? 0 : booksMap.hashCode());
  60. 		result = prime * result
  61. 				+ ((computerList == null) ? 0 : computerList.hashCode());
  62. 		result = prime * result
  63. 				+ ((integerValue == null) ? 0 : integerValue.hashCode());
  64. 		result = prime * result
  65. 				+ ((longValue == null) ? 0 : longValue.hashCode());
  66. 		result = prime * result
  67. 				+ ((stringValue == null) ? 0 : stringValue.hashCode());
  68. 		return result;
  69. 	}
  71. 	@Override
  72. 	public String toString() {
  73. 		return "MyConfigVo [stringValue=" + stringValue + ", integerValue="
  74. 				+ integerValue + ", longValue=" + longValue + ", booksMap="
  75. 				+ booksMap + ", computerList=" + computerList + "]";
  76. 	}
  78. 	@Override
  79. 	public boolean equals(Object obj) {
  80. 		if (this == obj)
  81. 			return true;
  82. 		if (obj == null)
  83. 			return false;
  84. 		if (getClass() != obj.getClass())
  85. 			return false;
  86. 		MyConfigVo other = (MyConfigVo) obj;
  87. 		if (booksMap == null) {
  88. 			if (other.booksMap != null)
  89. 				return false;
  90. 		} else if (!booksMap.equals(other.booksMap))
  91. 			return false;
  92. 		if (computerList == null) {
  93. 			if (other.computerList != null)
  94. 				return false;
  95. 		} else if (!computerList.equals(other.computerList))
  96. 			return false;
  97. 		if (integerValue == null) {
  98. 			if (other.integerValue != null)
  99. 				return false;
  100. 		} else if (!integerValue.equals(other.integerValue))
  101. 			return false;
  102. 		if (longValue == null) {
  103. 			if (other.longValue != null)
  104. 				return false;
  105. 		} else if (!longValue.equals(other.longValue))
  106. 			return false;
  107. 		if (stringValue == null) {
  108. 			if (other.stringValue != null)
  109. 				return false;
  110. 		} else if (!stringValue.equals(other.stringValue))
  111. 			return false;
  112. 		return true;
  113. 	}
  115. }
  1. package com.ll.myThreadStudy.MyThread;
  3. public class ComputerVo {
  4. 	private String type;
  5. 	private String size;
  7. 	public String getType() {
  8. 		return type;
  9. 	}
  11. 	public void setType(String type) {
  12. 		this.type = type;
  13. 	}
  15. 	public String getSize() {
  16. 		return size;
  17. 	}
  19. 	public void setSize(String size) {
  20. 		this.size = size;
  21. 	}
  23. 	@Override
  24. 	public String toString() {
  25. 		return "ComputerVo [type=" + type + ", size=" + size + "]";
  26. 	}
  28. }
  1. package com.ll.myThreadStudy.MyThread;
  3. public class BookVo {
  4. 	private Integer id;
  5. 	private String name;
  6. 	private Long price;
  8. 	public Integer getId() {
  9. 		return id;
  10. 	}
  12. 	public void setId(Integer id) {
  13. 		this.id = id;
  14. 	}
  16. 	public String getName() {
  17. 		return name;
  18. 	}
  20. 	public void setName(String name) {
  21. 		this.name = name;
  22. 	}
  24. 	public Long getPrice() {
  25. 		return price;
  26. 	}
  28. 	public void setPrice(Long price) {
  29. 		this.price = price;
  30. 	}
  32. 	@Override
  33. 	public String toString() {
  34. 		return "BookVo [id=" + id + ", name=" + name + ", price=" + price + "]";
  35. 	}
  37. }

测试文件

  1. package com.ll.myThreadStudy.MyThread;
  3. public class Main {
  4. 	public static void main(String args[]) {
  5. 		MyConfigVo myConfigVo = XmlToConfigVO.getLogSystemConfigVO("d:\\myConfig.xml");
  6. 		System.out.println(myConfigVo);
  7. 	}
  9. }

测试结果


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    【XML配置文件读取】使用jdom读取XML配置文件信息

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    原文地址：http://www.cnblogs.com/ssslinppp/p/4954451.html
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