java讀取XML

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方法不在多，能用就好。

我採用的是dom4j

    <dependency>     <groupId>dom4j</groupId>     <artifactId>dom4j</artifactId>     <version>1.6.1</version>    </dependency>

讀取的檔案內容如下：

<?xml version="1.0" encoding="UTF-8"?><users>    <module id="1">        <user index="1">            <name>tom</name>            <password>12345</password>            <date>20150526</date>        </user>        <user index="2">            <name>jack</name>            <password>5%</password>            <date>20150526</date>        </user>        <user index="3">            <name>john</name>            <password>5%</password>            <date>20150526</date>        </user>    </module></users>

讀取思路是：

1. 建立一個SAXReader執行個體;

2. 建立一個檔案讀取BufferedReader執行個體;

3. 建立一個Document執行個體讀取BufferedReader;

4. 擷取xml檔案的根節點;

5. 擷取根節點的子節點;

6. 遍曆子節點，擷取節點名用getName(),擷取節點的值用getText(),擷取屬性值用attributeValue(String)

擷取根節點的代碼如下：

    public static List<Element> readXml(String FilePath){        BufferedReader in = null;        List<Element> elementlist = null;        Document doc = null;                SAXReader reader = new SAXReader();        try {            in = new BufferedReader(new FileReader(FilePath));        } catch (FileNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        try {            doc = reader.read(in);        } catch (DocumentException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }                Element root = doc.getRootElement();        elementlist = root.elements();                return elementlist;            }

遍曆子節點, 讀取使用者名稱和密碼的代碼如下：

    @SuppressWarnings("unchecked")    public List<HashMap<String, String>> readUserDotXML(String path, String module_id){        List<HashMap<String, String>> users = new ArrayList<HashMap<String, String>>();        String rootPath = path;        List<Element> list = ReadXML.readXml(rootPath);        if (list != null) {            for (Element ele : list) {                String index = ele.attributeValue("id");                if(module_id.equals(index)){                    List<Element> userList = ele.elements();                    if(userList != null && userList.size()>0){                        for (Element user : userList) {                            HashMap<String,String> hashMap = new HashMap<String, String>();                            Element name = user.element("name");                            Element password = user.element("password");                            String nameValue = name.getText();                            String passwordValue = password.getText();                            hashMap.put("name", nameValue);                            hashMap.put("password", passwordValue);                            users.add(hashMap);                        }                    }                                        break;                }            }        }                return users;            }

main函數調用方法如下:

List<HashMap<String, String>> resultlist= readxml.readUserDotXML("e:/testXML.xml","1");for (HashMap<String, String> hashMap : resultlist) {    System.out.println(hashMap.get("name"));    System.out.println(hashMap.get("password"));}

使用java總感覺沒python那麼乾脆，這裡多幾步，那裡多幾步的。下次對python也總結一下xml讀取

java讀取XML