上一篇我們講述了dom4j讀取xml的4種方法，甚是精彩，那么怎么樣寫入xml呢？我們直接看下源碼實現。

public static void main(String[] args) throws Exception {

// 創建文檔

Document document = DocumentHelper.createDocument();

// 設置編碼

document.setXMLEncoding("GBK");

// 創建根節點

Element root = document.addElement("students");

// 創建xmlns xml namespace

root.addNamespace("", "http://www.abc.com/ns/test");

root.addNamespace("t", "http://www.abc.com/ns/test");

root.addNamespace("xsi", "http://www.w3.org/2001/XMLSchema-instance");

// 創建屬性

root.addAttribute("xsi:schemaLocation",

"http://www.abc.com/ns/test student.xsd");

// 創建對象數組

Student[] s = new Student[5];

// 創建對象

s[0] = new Student("001", "za", "za@163.com", 50, 19, true);

s[1] = new Student("002", "zb", "zb@163.com", 51, 20, true);

s[2] = new Student("003", "zc", "zc@163.com", 52, 21, true);

s[3] = new Student("004", "zd", "zd@163.com", 53, 22, true);

s[4] = new Student("005", "ze", "ze@163.com", 54, 23, true);

// 寫入對象

for (int i = 0; i < s.length; i++) {

Student stu = s[i];

// 創建根節點

Element e1 = root.addElement("student",

"http://www.abc.com/ns/test");

// 添加子元素

e1.addElement("id").addText(stu.getId());

e1.addElement("name").addText(stu.getName());

e1.addElement("email").addText(stu.getEmail());

e1.addElement("gender").addText(stu.getGender() ? "男" : "女");

e1.addElement("age").addText("" + stu.getAge());

e1.addElement("java").addText("" + stu.getJava());

}

// 創建輸出流

FileOutputStream fos = new FileOutputStream("student.xml");

// 設置編碼

OutputStreamWriter osw = new OutputStreamWriter(fos, "GBK");

OutputFormat of = new OutputFormat();

of.setEncoding("GBK");

of.setIndent(true);

of.setIndent(" ");

of.setNewlines(true);

// 寫入文件

XMLWriter writer = new XMLWriter(osw, of);

writer.write(document);

writer.close();

}

以上代碼言簡意賅。大家可以自己寫寫調試下。

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