本文介绍了内置一颗类" TimetableData"使用simpleframework,节省了细如XML,但是当我尝试读它在code,它引发的PersistenceException的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
20 04-21:09:17.590:W / System.err的(23059):org.simpleframework.xml.core.PersistenceException:构造不类com.example.simplexml匹配.DayData
我在哪里,我在这似乎是做工精细的XML文件保存数据主类
串行串行=新的持留(); TimetableData timetableData =新TimetableData(); SubjectData编程=新SubjectData(编程,心电12,1200,1400);
SubjectData电子元件=新SubjectData(电子,心电13,1400,1600); timetableData.daysData.get(0).subjectsData.add(电子产品);
timetableData.daysData.get(1).subjectsData.add(编程); 文件的结果=新的文件(this.getFilesDir()的getPath()的toString()+的example.xml。);
尝试{
serializer.write(timetableData,结果);
}
在这一刻,如果我看XMLFILE,我可以看到它,它看起来正常的..但是当我看到它,它抛出异常。这是我正在读它。
TimetableData timetableData;
尝试{
timetableData = serializr.read(TimetableData.class,源); //这引发异常 DayData myDay = timetableData.daysData.get(0);
SubjectData mySub = myDay.subjectsData.get(0);
}赶上(例外五){
// TODO自动生成catch块
e.printStackTrace();
Toast.makeText(这一点,e.toString(),Toast.LENGTH_LONG).show();
}
类daydata P>
公共类DayData {@Attribute(NAME =DAYNAME)
私人字符串DAYNAME;
@ElementList(NAME =subjectsData,内联= TRUE)
公开名单< SubjectData> subjectsData =新的ArrayList< SubjectData>();公共DayData(字符串DAYNAME)
{
this.dayName = DAYNAME;
}公共字符串getDayName()
{
返回DAYNAME;
}
}
我的类TimetableData,使dayData列表
@root
公共类TimetableData {@ElementList(NAME =daysData,内联= TRUE)
公开名单< DayData> daysData;公共TimetableData()
{
daysData =新的ArrayList< DayData>();
daysData.add(新DayData(星期一));
daysData.add(新DayData(星期二));
daysData.add(新DayData(星期三));
daysData.add(新DayData(星期四));
daysData.add(新DayData(星期五));
}
}
我的课subjectData P>
公共类SubjectData { @Element(NAME =classLoc)
私人字符串classLoc; @Element(NAME =startTime时)
私人诠释的startTime; @Element(NAME =结束时间)
私人诠释结束时间; @Attribute(NAME =主旨名称)
私人字符串主旨名称; 公共SubjectData(){
超();
} 公共SubjectData(字符串主旨名称,字符串classLoc,诠释的startTime,诠释结束时间){
this.classLoc = classLoc;
this.subjectName =主旨名称;
this.startTime =的startTime;
this.endTime =结束时间;
} 公共字符串getClassLoc(){
返回classLoc;
} 公众诠释getStartTime()
{
返回的startTime;
} 公众诠释getEndTime()
{
返回结束时间;
}
公共字符串getDayName(){
返回主旨名称;
}
}
这是创建的XMLFILE
< timetableData>
< dayData DAYNAME =星期一>
< subjectData主旨名称=电子>
< classLoc>心电图13 LT; / classLoc>
<&的startTime GT; 1400℃; /&的startTime GT;
<结束时间> 1600 LT; /结束时间>
< / subjectData>
< / dayData>
< dayData DAYNAME =星期二>
< subjectData主旨名称=编程>
< classLoc>心电图12 LT; / classLoc>
<&的startTime GT; 1200℃; /&的startTime GT;
<结束时间> 1400℃;时间/结束>
< / subjectData>
< / dayData>
< dayData DAYNAME =星期三/>
< dayData DAYNAME =星期四/>
< dayData DAYNAME =星期五/>
< / timetableData>
解决方案
试试这个:
公共类DayData {@Attribute(NAME =DAYNAME)
私人字符串DAYNAME;
@ElementList(NAME =subjectsData,内联= TRUE)
公开名单< SubjectData> subjectsData =新的ArrayList< SubjectData>();公共DayData(@Attribute(NAME =DAYNAME)字符串DAYNAME)
{
this.dayName = DAYNAME;
}公共字符串getDayName()
{
返回DAYNAME;
}
}
04-21 20:09:17.590: W/System.err(23059): org.simpleframework.xml.core.PersistenceException: Constructor not matched for class com.example.simplexml.DayData
my main class where I am saving the data in the xml File which seems to work fine
Serializer serializer = new Persister();
TimetableData timetableData = new TimetableData();
SubjectData programming = new SubjectData("Programming","ECG 12",1200, 1400);
SubjectData electronics = new SubjectData("Electronics","ECG 13", 1400, 1600);
timetableData.daysData.get(0).subjectsData.add(electronics);
timetableData.daysData.get(1).subjectsData.add(programming);
File result = new File(this.getFilesDir().getPath().toString() + "example.xml");
try {
serializer.write(timetableData, result);
}
at this moment, if I look at the xmlfile, I can see it, and it looks alright.. but when I read it, it throws the exception. This is how I am reading it.
TimetableData timetableData;
try {
timetableData = serializr.read(TimetableData.class, source);//this throws the exception
DayData myDay= timetableData.daysData.get(0);
SubjectData mySub = myDay.subjectsData.get(0);
}catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
}
class daydata
public class DayData {
@Attribute(name="dayName")
private String dayName;
@ElementList(name="subjectsData", inline=true)
public List<SubjectData> subjectsData = new ArrayList<SubjectData>();
public DayData(String dayName)
{
this.dayName = dayName;
}
public String getDayName()
{
return dayName;
}
}
my Class TimetableData that makes a list of dayData
@Root
public class TimetableData {
@ElementList(name="daysData",inline=true)
public List<DayData> daysData;
public TimetableData()
{
daysData = new ArrayList<DayData>();
daysData.add(new DayData("monday"));
daysData.add(new DayData("tuesday"));
daysData.add(new DayData("wednesday"));
daysData.add(new DayData("thursday"));
daysData.add(new DayData("friday"));
}
}
my class subjectData
public class SubjectData{
@Element(name="classLoc")
private String classLoc;
@Element(name="startTime")
private int startTime;
@Element(name="endTime")
private int endTime;
@Attribute(name="subjectName")
private String subjectName;
public SubjectData() {
super();
}
public SubjectData(String subjectName, String classLoc, int startTime, int endTime) {
this.classLoc = classLoc;
this.subjectName = subjectName;
this.startTime = startTime;
this.endTime = endTime;
}
public String getClassLoc() {
return classLoc;
}
public int getStartTime()
{
return startTime;
}
public int getEndTime()
{
return endTime;
}
public String getDayName() {
return subjectName;
}
}
This is the xmlFile created
<timetableData>
<dayData dayName="monday">
<subjectData subjectName="Electronics">
<classLoc>ECG 13</classLoc>
<startTime>1400</startTime>
<endTime>1600</endTime>
</subjectData>
</dayData>
<dayData dayName="tuesday">
<subjectData subjectName="Programming">
<classLoc>ECG 12</classLoc>
<startTime>1200</startTime>
<endTime>1400</endTime>
</subjectData>
</dayData>
<dayData dayName="wednesday"/>
<dayData dayName="thursday"/>
<dayData dayName="friday"/>
</timetableData>
解决方案
Try this:
public class DayData {
@Attribute(name="dayName")
private String dayName;
@ElementList(name="subjectsData", inline=true)
public List<SubjectData> subjectsData = new ArrayList<SubjectData>();
public DayData(@Attribute(name="dayName") String dayName)
{
this.dayName = dayName;
}
public String getDayName()
{
return dayName;
}
}
这篇关于内置一颗类&QUOT; TimetableData&QUOT;使用simpleframework,节省了细如XML,但是当我尝试读它在code,它引发的PersistenceException的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!