java源文件解析

建一个Student实体类封装数据

public static List<Student>readXml() {

List<Student>list = new ArrayList<Student>()

//定义一个<a href="https://www.baidu.com/s?wd=dom%E8%A7%A3%E6%9E%90&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Y3uhnvryDYrjIBPyDYn1Rv0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1RznjcYn1TLnH04rjcYnjTvPf" target="_blank" class="baidu-highlight">dom解析</a>器工厂实例

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance()

try {

//由工厂实例得到一个<a href="https://www.baidu.com/s?wd=dom%E8%A7%A3%E6%9E%90&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Y3uhnvryDYrjIBPyDYn1Rv0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1RznjcYn1TLnH04rjcYnjTvPf" target="_blank" class="baidu-highlight">dom解析</a>器

DocumentBuilder dom = factory.newDocumentBuilder()

//找到<a href="https://www.baidu.com/s?wd=xml%E6%96%87%E6%A1%A3&tn=44039180_cpr&fenlei=mv6quAkxTZn0IZRqIHckPjm4nH00T1Y3uhnvryDYrjIBPyDYn1Rv0ZwV5Hcvrjm3rH6sPfKWUMw85HfYnjn4nH6sgvPsT6K1TL0qnfK1TL0z5HD0IgF_5y9YIZ0lQzqlpA-bmyt8mh7GuZR8mvqVQL7dugPYpyq8Q1RznjcYn1TLnH04rjcYnjTvPf" target="_blank" class="baidu-highlight">xml文档</a>

File file=new File("src/com/jereh/ch05/Students.xml")

Document doc=dom.parse(file)

//

Element root = doc.getDocumentElement()

NodeList stuNodeList = root.getChildNodes()

for (int i = 0i <stuNodeList.getLength()i++) {

Node stu = stuNodeList.item(i)

Student student = new Student()

if (stu != null &&stu.getNodeType() == Node.ELEMENT_NODE) {

// System.out.println(stu)

Element stuElement = (Element) stu

student.setNo(stuElement.getAttribute("id"))

// stu.getAttributes().getNamedItem(null)

// Element stu=(Element)stuNodeList

NodeList info = stuElement.getChildNodes()

for (int j = 0j <info.getLength()j++) {

info.item(j).getNodeName()

Node n = info.item(j)

if ("name".equals(n.getNodeName())) {

// n.getFirstChild().getNodeValue()

student.setName(n.getLastChild().getNodeValue())

} else if ("age".equals(n.getNodeName())) {

student.setAge(Integer.parseInt(n.getFirstChild()

.getNodeValue()))

}

list.add(student)

}

}

}

} catch (ParserConfigurationException e) {

// TODO Auto-generated catch block

e.printStackTrace()

} catch (SAXException e) {

// TODO Auto-generated catch block

e.printStackTrace()

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace()

}

// System.out.println(root.getNodeValue())

return list

}

如何运行吧。解析的过程，是“不可知”的，除非你看研究JAVA的源码。

先编辑好源码

再编译

javac MyClass.java

java MyClass 就可以运行

查看类的方法 结构 用反射啦

我以前也写过一个这样的程序 模仿一下反编译

主要用的方法是

Class c=Class.forName(str)

int m=c.getModifiers()

//类标题

boolean class_=false

if(Modifier.isInterface(m))

{

if(Modifier.isPublic(m))

cla.append("public ")

cla.append("interface ")

}

else

{

class_=true

if(Modifier.isPublic(m))

cla.append("public ")

if(Modifier.isFinal(m))

cla.append("final ")

if(Modifier.isAbstract(m))

cla.append("abstract ")

cla.append("class ")

}

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