집 >백엔드 개발 >XML/RSS 튜토리얼 >XML 파싱 툴킷 Xstream의 샘플 코드에 대한 자세한 설명
기능
간소화된 API,
매핑 파일 없음
낮은 메모리 사용량
import com.thoughtworks.xstream.XStream; import com.thoughtworks.xstream.io.xml.DomDriver; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import java.io.*; /** * 输出xml和解析xml的工具类 */ public class XmlUtil { private static final Logger logger = LoggerFactory. getLogger(XmlUtil.class); /** * java 转换成xml * @param obj 对象实例 * @return String xml字符串 * @Title: toXml * @Description: TODO */ public static String toXml(Object obj) { //XStream xstream=new XStream(); //默认使用xpp解析器 //指定编码解析器 XStream xstream = new XStream(new DomDriver("utf-8")); //启用注解识别 xstream.processAnnotations(obj.getClass()); return xstream.toXML(obj); } /** * 将传入xml文本转换成Java对象 * @param xmlStr * @param cls xml对应的class类 * @return T xml对应的class类的实例对象 */ public static <T> T toBean(String xmlStr, Class<T> cls) { XStream xstream = new XStream(); xstream.processAnnotations(cls); T obj = (T) xstream.fromXML(xmlStr); return obj; } /** * 写到xml文件中去 * @param obj 对象 * @param absPath 绝对路径 * @param fileName 文件名 */ public static boolean toXMLFile(Object obj, String absPath, String fileName) { String strXml = toXml(obj); String filePath = absPath + fileName; File file = new File(filePath); if (!file.exists()) { try { file.createNewFile(); } catch (IOException e) { logger.error("file creation failed, cause is {}", e); return false; } } OutputStream ous = null; try { ous = new FileOutputStream(file); ous.write(strXml.getBytes()); ous.flush(); } catch (Exception e1) { logger.error("file write failed, cause is {}", e1); return false; } finally { if (ous != null) try { ous.close(); } catch (IOException e) { e.printStackTrace(); } } return true; } /** * 从xml文件读取报文 * @param absPath 绝对路径 * @param fileName 文件名 * @param cls */ public static <T> T toBeanFromFile(String absPath, String fileName, Class<T> cls) throws Exception { String filePath = absPath + fileName; InputStream ins = null; try { ins = new FileInputStream(new File(filePath)); } catch (Exception e) { throw new Exception("read {" + filePath + "} file failed!", e); } XStream xstream = new XStream(); xstream.processAnnotations(cls); T obj = null; try { obj = (T) xstream.fromXML(ins); } catch (Exception e) { throw new Exception("parse {" + filePath + "} file failed!", e); } if (ins != null) ins.close(); return obj; } }2. 교사 수업 쓰기
rree
3. 학생 수업 쓰기rree
4. 시험 시험 수업import com.thoughtworks.xstream.annotations.XStreamAlias; import com.thoughtworks.xstream.annotations.XStreamAsAttribute; import com.thoughtworks.xstream.annotations.XStreamImplicit; import java.util.List; @XStreamAlias(value = "teacher") public class Teacher { @XStreamAsAttribute private String name; @XStreamAsAttribute private String phone; @XStreamAsAttribute private int age; @XStreamImplicit(itemFieldName = "student") private List<Student> students; public Teacher() { } public Teacher(String name, String phone, int age, List<Student> students) { this.name = name; this.phone = phone; this.age = age; this.students = students; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPhone() { return phone; } public void setPhone(String phone) { this.phone = phone; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public List<Student> getStudents() { return students; } public void setStudents(List<Student> students) { this.students = students; } }5 . 🎜>
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