解析一个XML文件: XML解析器
发布时间：2020-12-15 23:21:22 所属栏目：百科 来源：网络整理
导读：解析一个 XML 文件 :XML 解析器 public class MainActivity extends Activity implements OnClickListener { private Button bt ; private SmsBean sms ; private ListSmsBean smsList ; @Override protected void onCreate(Bundle savedInstanceState) { su
解析一个XML文件:XML解析器
public
class
MainActivity
extends
Activity
implements
OnClickListener {
private
Button
bt
;
private
SmsBean
sms
;
private
List<SmsBean>
smsList
;
@Override
protected
void
onCreate(Bundle savedInstanceState) {
super
.onCreate(savedInstanceState);
setContentView(R.layout.
activity_main
);
bt
=(Button) findViewById(R.id.
bt
);
bt
.setOnClickListener(
this
);
}
/**
* 解析xml文件的方法
*
@param
v
*/
@Override
public
void
onClick(View v) {
try
{
//创建pull解析器
XmlPullParser parser = Xml.newPullParser();
//pull解析器配置
FileInputStream fis=
new
FileInputStream(Environment.getExternalStorageDirectory().getPath()+
"/sms.xml"
);
parser.setInput(fis,
"UTF-8"
);
//开始解析,获事件的类型
int
eventType = parser.getEventType();
while
(eventType!=XmlPullParser.
END_DOCUMENT
){
//当事件类型不等于END_DOCUMENT时,继续解析
String tageName=parser.getName();
//得到解析节点的名称
switch
(eventType) {
case
XmlPullParser.
START_TAG
:
//当解析的事件是开始标签时
if
(
"Sms"
.equals(tageName)){
smsList
=
new
ArrayList<SmsBean>();
}
else
if
(
"sms"
.equals(tageName)){
sms
=
new
SmsBean();
sms
.setName(parser.getAttributeValue(0));
}
else
if
(
"address"
.equals(tageName)){
sms
.setStress(parser.nextText());
}
else
if
(
"content"
.equals(tageName)){
sms
.setContent(parser.nextText());
}
else
if
(
"tate"
.equals(tageName)){
sms
.setDate(Integer.parseInt(parser.nextText()));
}
break
;
case
XmlPullParser.
END_TAG
:
if
(
"Sms"
.equals(tageName)){
smsList
.add(
sms
);
sms
=
null
;
}
break
;
}
}
//继续往下解析
eventType=parser.next();
}
catch
(Exception e) {
e.printStackTrace();
}
sms
.toString();
}
}
--------------------------------------------------------------------------------------------------
解析网络上xml文件和json文件:
public
class
PersonService {
public
List<Person> getPersonsByXML()
throws
Exception {
URL url =
new
URL(
"http://192.168.1.100:8080/05.Web/persons.xml"
);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(3000);
int
code = conn.getResponseCode();
if
(code == 200) {
InputStream in = conn.getInputStream();
return
parseXML(in);
}
throw
new
RuntimeException(
"网络异常: "
+ code);
}
/**
* 解析网络上的xml文件
*
@param
in
*
@return
*
@throws
Exception
*/
private
List<Person> parseXML(InputStream in)
throws
Exception {
XmlPullParser parser = Xml.newPullParser();
parser.setInput(in,
"UTF-8"
);
List<Person> list =
new
ArrayList<Person>();
Person p =
null
;
for
(
int
type = parser.getEventType(); type != XmlPullParser.
END_DOCUMENT
; type = parser.next()) {
if
(type == XmlPullParser.
START_TAG
) {
if
(
"person"
.equals(parser.getName())) {
p =
new
Person();
String id = parser.getAttributeValue(0);
p.setId(Integer.parseInt(id));
list.add(p);
}
else
if
(
"name"
.equals(parser.getName())) {
String name = parser.nextText();
p.setName(name);
}
else
if
(
"age"
.equals(parser.getName())) {
String age = parser.nextText();
p.setAge(Integer.parseInt(age));
}
}
}
return
list;
}
/**
* 解析网络上的json文件
*
@return
*
@throws
Exception
*/
public
List<Person> getPersonsByJSON()
throws
Exception {
URL url =
new
URL(
"http://192.168.1.100:8080/05.Web/persons.js"
);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(3000);
int
code = conn.getResponseCode();
if
(code == 200) {
InputStream in = conn.getInputStream();
return
parseJSON(in);
}
throw
new
RuntimeException(
"网络异常: "
+ code);
}
private
List<Person> parseJSON(InputStream in)
throws
Exception {
ByteArrayOutputStream out =
new
ByteArrayOutputStream();
byte
[] buffer =
new
byte
[8192];
int
length;
while
((length = in.read(buffer)) != -1)
out.write(buffer,length);
in.close();
out.close();
String json =
new
String(out.toByteArray());
List<Person> list =
new
ArrayList<Person>();
JSONArray arr =
new
JSONArray(json);
// 把String封装成JSON数组
for
(
int
i = 0; i < arr.length(); i++) {
// 遍历JSON数组
JSONObject obj = arr.getJSONObject(i);
// 获取每个JSON对象
Person p =
new
Person();
p.setId(obj.getInt(
"id"
));
// 从JSON对象中获取"id"字段的值
p.setName(obj.getString(
"name"
));
p.setAge(obj.getInt(
"age"
));
list.add(p);
}
return
list;
}
}
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