利用dom4j包和反射动态解析不同实体类型的xml文件
自己写了个根据传入的实体类能够动态的解析相应的Xml文件的工具类
xml文件结构如下
TeacherTable:
<TeacherTable>
<Table1>
<DepartmentID>30</DepartmentID>
<BMH>214</BMH>
<DepartmentName>外国语学院</DepartmentName>
<TeacherNO>P284</TeacherNO>
<TeacherName>张三丰</TeacherName>
<IdentityNO>42050288885198888</IdentityNO>
<Degree>无</Degree>
<Rank />
<Resume />
<Email />
</Table1>
</TeacherTable>
StudentTable
<StudentTable>
<Table1>
<DepartmentID>59</DepartmentID>
<DepartmentName>物理学院</DepartmentName>
<StuID>999999</StuID>
<ClassNO>20109999</ClassNO>
<StuNO>2010999999</StuNO>
<StuName>李小四</StuName>
<Grade>2010</Grade>
<Sex>男</Sex>
<Birthday>19900101</Birthday>
<PoliticalState>共青团员</PoliticalState>
<SpecialName>物理</SpecialName>
<SpecialID>279</SpecialID>
<Nation>汉族</Nation>
<IdentityNO>42099199109279999</IdentityNO>
<EduYear>4</EduYear>
<EduLever>本科</EduLever>
</Table1>
</StudentTable>相应的实体类
package net.model;
/**
* 老师信息格式
*/
public class TeacherTable {
private String DepartmentID;
private String BMH;
private String DepartmentName;
private String TeacherNO;
private String TeacherName;
private String IdentityNO;
private String Degree;
private String Rank;
private String Resume;
private String Email;
public String getDepartmentID() {
return DepartmentID;
}
public void setDepartmentID(String departmentID) {
DepartmentID = departmentID;
}
public String getBMH() {
return BMH;
}
public void setBMH(String bMH) {
BMH = bMH;
}
public String getDepartmentName() {
return DepartmentName;
}
public void setDepartmentName(String departmentName) {
DepartmentName = departmentName;
}
public String getTeacherNO() {
return TeacherNO;
}
public void setTeacherNO(String teacherNO) {
TeacherNO = teacherNO;
}
public String getTeacherName() {
return TeacherName;
}
public void setTeacherName(String teacherName) {
TeacherName = teacherName;
}
public String getIdentityNO() {
return IdentityNO;
}
public void setIdentityNO(String identityNO) {
IdentityNO = identityNO;
}
public String getDegree() {
return Degree;
}
public void setDegree(String degree) {
Degree = degree;
}
public String getRank() {
return Rank;
}
public void setRank(String rank) {
Rank = rank;
}
public String getResume() {
return Resume;
}
public void setResume(String resume) {
Resume = resume;
}
public String getEmail() {
return Email;
}
public void setEmail(String email) {
Email = email;
}
}package net.model;
/**
* 学生信息格式
*/
public class StudentTable {
private String DepartmentID;
private String DepartmentName;
private String StuID;
private String ClassNO;
private String StuNO;
private String StuName;
private String Grade;
private String Sex;
private String Birthday;
private String PoliticalState;
private String SpecialName;
private String SpecialID;
private String Nation;
private String IdentityNO;
private String EduYear;
private String EduLever;
public String getDepartmentID() {
return DepartmentID;
}
public void setDepartmentID(String departmentID) {
DepartmentID = departmentID;
}
public String getDepartmentName() {
return DepartmentName;
}
public void setDepartmentName(String departmentName) {
DepartmentName = departmentName;
}
public String getStuID() {
return StuID;
}
public void setStuID(String stuID) {
StuID = stuID;
}
public String getClassNO() {
return ClassNO;
}
public void setClassNO(String classNO) {
ClassNO = classNO;
}
public String getStuNO() {
return StuNO;
}
public void setStuNO(String stuNO) {
StuNO = stuNO;
}
public String getStuName() {
return StuName;
}
public void setStuName(String stuName) {
StuName = stuName;
}
public String getGrade() {
return Grade;
}
public void setGrade(String grade) {
Grade = grade;
}
public String getSex() {
return Sex;
}
public void setSex(String sex) {
Sex = sex;
}
public String getBirthday() {
return Birthday;
}
public void setBirthday(String birthday) {
Birthday = birthday;
}
public String getPoliticalState() {
return PoliticalState;
}
public void setPoliticalState(String politicalState) {
PoliticalState = politicalState;
}
public String getSpecialName() {
return SpecialName;
}
public void setSpecialName(String specialName) {
SpecialName = specialName;
}
public String getSpecialID() {
return SpecialID;
}
public void setSpecialID(String specialID) {
SpecialID = specialID;
}
public String getNation() {
return Nation;
}
public void setNation(String nation) {
Nation = nation;
}
public String getIdentityNO() {
return IdentityNO;
}
public void setIdentityNO(String identityNO) {
IdentityNO = identityNO;
}
public String getEduYear() {
return EduYear;
}
public void setEduYear(String eduYear) {
EduYear = eduYear;
}
}开始写一个Xml解析工具类
package net.utils;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import net.tudentTable;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
public class XMLUtil {
@SuppressWarnings("unchecked")
public static List toModuleList(InputStream input, String className) {
SAXReader reader = new SAXReader();
reader.setValidation(false);
Document document = null;
List list = new ArrayList();
try {
// 解析xml
document = reader.read(input);
// 根节点
Element root = document.getRootElement();
Iterator it = root.elementIterator();
// 次节点循环
while (it.hasNext()) {
// 次子节点
Element nodeFirst = (Element) it.next();
//反射
Class objCls = Class.forName(className);
Object obj = objCls.newInstance();
// 获得传入实体类的所有方法
Method[] methods = objCls.getMethods();
for (Method getter : methods) {
String name = getter.getName();
Method setter = null;
// 获取get方法,
if (name.startsWith("get")) {
//相应的set方法名
String lastName = name.substring(3);
String setName = "set" + lastName;
//get方法返回数据的类型
Class type = getter.getReturnType();
try {
//相应的set方法
setter = objCls.getMethod(setName, type);
} catch (NoSuchMethodException e) {
continue;
}
//根据节点名获得相应的内容
String val = nodeFirst.elementText(lastName);
//调用set方法
setter.invoke(obj, val);
}
}
list.add(obj);
}
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("xml文件读取错误", e);
}
return list;
}
public static void main(String[] args) throws FileNotFoundException {
InputStream input = new FileInputStream(
"studentTable.xml");
List list = XMLUtil.toModuleList(input,
"net.model.StudentTable");
for (int i = 0; i < list.size(); i++) {
StudentTable stuTable = (StudentTable) list.get(i);
if (stuTable != null) {
System.out.println("test" + stuTable.getStuName());
System.out.println("test" + stuTable.getStuNO());
}
}
input.close();
}
}其实需要同步的数据是别人提供的接口返回来的String类型的数据。用Xml模拟完之后，开始想的是先把获得的数据生成Xml，再读取xml来解析。后来才发现dom4j可以直接解析String类型的，现在知道的有两种方法
1.保留SAXReader
Document document = new SAXReader().read(new StringReader(传入的字符串));
2.可以直接省去SAXReader
Document document = DocumentHelper.parseText(传入的字符串);
实体类的属性名称开头是大写，这样命名貌似不规范，但是没法了，写的时候是直接复制过来。
哈哈，现在还是菜鸟，其实如果不怕麻烦一个文件写一个解析方法是就行了； 但是，正因为菜所以才想着做成动态的解析的方式，好让自己学习巩固反射机制，这个自己用的太少了。
有什么错误还请指正~~~
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