xml文件内容

在src/main/resources下面添加《operator-config.xml》文件，文件内容如下：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?><operator-config group="business"><operator-table code="tb_2001"><name>测试0401</name></operator-table><operator-table code="tb_"><name>测试0509</name></operator-table></operator-config>

添加实体类

解析xml文件，需要根据xml的内容创建实体类，用于存放读取到的xml文件的内容

添加OperatorTable实体类

用于存储<operator-table>对应的数据，代码如下：

import java.io.Serializable;import javax.xml.bind.annotation.XmlAttribute;public class OperatorTable implements Serializable {/****/private static final long serialVersionUID = -3462638489558342948L;private String code;private String name;@XmlAttributepublic String getCode() {return code;}public void setCode(String code) {this.code = code;}public String getName() {return name;}public void setName(String name) {this.name = name;}}

添加OperatorConfig实体类

用于存放<operator-config>对应的数据，代码如下：

import java.util.ArrayList;import java.util.List;import javax.xml.bind.annotation.XmlAttribute;import javax.xml.bind.annotation.XmlElement;import javax.xml.bind.annotation.XmlRootElement;import mons.lang3.StringUtils;@XmlRootElement(name = "operator-config")public class OperatorConfig {private String group;private List<OperatorTable> operatorTableList = new ArrayList<OperatorTable>();public boolean containsOperatorTable(String tableCode) {if (StringUtils.isEmpty(tableCode)) {return false;}for (int i = 0; i < operatorTableList.size(); i++) {OperatorTable operatorTable = operatorTableList.get(i);if (tableCode.equalsIgnoreCase(operatorTable.getCode())) {return true;}}return false;}@XmlAttributepublic String getGroup() {return group;}public void setGroup(String group) {this.group = group;}@XmlElement(name="operator-table")public List<OperatorTable> getOperatorTableList() {return operatorTableList;}public void setOperatorTableList(List<OperatorTable> operatorTableList) {this.operatorTableList = operatorTableList;}}

注解说明

@XmlRootElement(name = “operator-config”)：根节点说明，必须要有，否则读取不到数据

@XmlAttribute：标识出该变量对应的是xml中的属性

@XmlElement(name=“operator-table”)：标识出该变量对应的子节点

读取XML文件类

用于读取xml文件，代码如下：

import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import javax.xml.bind.JAXBContext;import javax.xml.bind.JAXBException;import javax.xml.bind.Unmarshaller;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class OperatorConfigManager {/*** Logger*/private final Logger log = LoggerFactory.getLogger(OperatorConfigManager.class);/*** 加载的OperatorConfig*/private OperatorConfig operatorConfig = null;/*** 内部单例实例*/private static OperatorConfigManager instance = new OperatorConfigManager();/*** 取得OperatorConfig加载器实例。** @return OperatorConfig加载器实例*/public static OperatorConfigManager getInstance() {return instance;}/*** 构造方法。*/private OperatorConfigManager() {if (this.operatorConfig == null) {this.operatorConfig = loadOperatorConfig();}}/*** GETTER(operatorConfig)** @return operatorConfig*/public OperatorConfig getOperatorConfig() {return operatorConfig;}/*** 从OperatorConfig定义文件中加载OperatorConfig。** @param defineInput 定义文件输入流* @return OperatorConfig*/public OperatorConfig reloadOperatorConfig(InputStream defineInput) {JAXBContext jc;OperatorConfig operatorConfig = null;try {jc = JAXBContext.newInstance(OperatorConfig.class);Unmarshaller u = jc.createUnmarshaller();operatorConfig = (OperatorConfig) u.unmarshal(defineInput);} catch (JAXBException e) {log.error("加载配置文件operator-config.xml出错", e);}return operatorConfig;}/*** 从默认的OperatorConfig定义文件(classpath://operator-config.xml)中加载OperatorConfig。** @return OperatorConfig*/@SuppressWarnings("resource")private OperatorConfig loadOperatorConfig() {InputStream is = null;try {String outpath = System.getProperty("user.dir") + File.separator;// 先读取外部目录的，没有再加载classpath的is = new FileInputStream(new File(outpath + "operator-config.xml"));} catch (IOException e) {System.out.println(e.getMessage());is = OperatorConfigManager.class.getClassLoader().getResourceAsStream("operator-config.xml"); // 默认加载classpath的}if (is != null) {return reloadOperatorConfig(is);} else {return null;}}}

loadOperatorConfig()方法中，会优先读取编译成jar包后外面的xml文件，读取不到，会读取打在jar包里面的xml文件