android之利用SAX、DOM和Pull实现对schools.xml的解析

package cn.csdn.service; import java.io.InputStream; import java.io.Writer; import java.util.ArrayList; import java.util.List; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlSerializer; import android.util.Xml; import cn.csdn.domain.School; import cn.csdn.domain.Student; import cn.csdn.domain.Teacher; public class PullSchoolService { public static List<School> getSchoolList(InputStream in) throws Exception{ List<School> schoolList=null; XmlPullParser parser=Xml.newPullParser(); parser.setInput(in,"utf-8"); School school=null; Teacher teacher=null; Student student=null; List<Student> studentList=null; int eventType=parser.getEventType(); while(eventType!=XmlPullParser.END_DOCUMENT){ switch(eventType){ case XmlPullParser.START_DOCUMENT: schoolList=new ArrayList<School>(); break; case XmlPullParser.START_TAG: if("school".equals(parser.getName())){ school=new School(); school.setLevel(parser.getAttributeValue(0)); studentList=new ArrayList<Student>(); }else if("teacherName".equals(parser.getName())){ teacher=new Teacher(); teacher.setName(parser.nextText()); }else if("teacherAge".equals(parser.getName())){ teacher.setAge(Integer.parseInt(parser.nextText())); }else if("studentName".equals(parser.getName())){ student=new Student(); student.setName(parser.nextText()); }else if("studentAge".equals(parser.getName())){ student.setAge(Integer.parseInt(parser.nextText())); } break; case XmlPullParser.END_TAG: if("teacher".equals(parser.getName())&&teacher!=null){ school.setTeacher(teacher); teacher=null; }else if("student".equals(parser.getName())&&student!=null){ studentList.add(student); student=null; }else if("school".equals(parser.getName())&&school!=null){ school.setStudent(studentList); schoolList.add(school); school=null; studentList=null; } break; } // next方法的导致进行下一个节点的解析，同时返回下一个节点解析的事件类型代码、 eventType = parser.next(); } return schoolList; } public static void writerPersonList(List<School> schoolList,Writer writer) throws Exception{ XmlSerializer serializer=Xml.newSerializer(); serializer.setOutput(writer); //定入 serializer.startDocument("utf-8", true); //写入根标签的起始 serializer.startTag(null, "schools"); for(School school:schoolList){ serializer.startTag(null, "school"); //添加id属性 serializer.attribute(null, "level", school.getLevel()); serializer.startTag(null, "teacher"); //老师姓名 serializer.startTag(null, "teacherName"); serializer.text(school.getTeacher().getName()); serializer.endTag(null, "teacherName"); //老师年龄 serializer.startTag(null, "teacherAge"); serializer.text(school.getTeacher().getAge()+""); serializer.endTag(null, "teacherAge"); serializer.endTag(null, "teacher"); for(Student list:school.getStudent()){ serializer.startTag(null, "student"); //学生姓名 serializer.startTag(null, "studentName"); serializer.text(list.getName()); serializer.endTag(null, "studentName"); //学生年龄 serializer.startTag(null, "studentAge"); serializer.text(list.getAge()+""); serializer.endTag(null, "studentAge"); serializer.endTag(null, "student"); } serializer.endTag(null, "school"); } //结束标签 serializer.endTag(null, "schools"); //结束文档的写入 serializer.endDocument(); writer.flush(); writer.close(); } }