解析重復使用SAX的xml嵌套節點
[英]parse xml nested nodes that repeat with SAX
問題描述
我已經尋找了好幾天，但似乎無法解決這個問題。 我已經能夠解析xml文檔，但是它具有子節點，這些子節點在移回到父節點之前會重復。 我的解析器似乎正確地遍歷了子節點，但是我只能看到最后一個子節點的結果，該結果被重復了多次。
如果父節點包含5個子節點，則它將5個節點中最后一個的結果打印5次。
我需要在“投資組合”和“交易”之后的xml標記才能正確解析。 最終獲得標記之前的xml標記，以便在“交易”之后排列並打印子節點，而無需重復“交易”中的最后一個節點
例子值得贊賞謝謝
import java.util.ArrayList;
import java.util.List;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
public class MyHandler extends DefaultHandler {
//List to hold trade object
private List<Portfolio> tradeList = null;
private Portfolio trd = null;
//getter method for trade list
public List<Portfolio> getEmpList() {
return tradeList;
}
boolean bdate = false;
boolean bfirm = false;
boolean bacctId = false;
boolean bUserId = false;
boolean bseg = false;
boolean btradedate = false;
boolean btradetime = false;
boolean bec = false;
boolean bexch = false;
boolean bpfcode = false;
boolean bpftype = false;
boolean bpe = false;
boolean btradeqty = false;
boolean btradeprice = false;
boolean bmore = false;
@Override
public void startElement(String uri, String localName, String qName, Attributes attributes)
throws SAXException {
if (qName.equalsIgnoreCase("portfolio")) {
trd = new Portfolio();
//initialize list
if (tradeList == null)
tradeList = new ArrayList<>();
} else if (qName.equalsIgnoreCase("firm")) {
bfirm = true;
} else if (qName.equalsIgnoreCase("acctId")) {
bacctId = true;
} else if (qName.equalsIgnoreCase("UserId")) {
bUserId = true;
} else if (qName.equalsIgnoreCase("seg")) {
bseg = true;
} else if (qName.equalsIgnoreCase("trade")) {
} else if (qName.equalsIgnoreCase("tradedate")) {
btradedate = true;
} else if (qName.equalsIgnoreCase("tradetime")) {
btradetime = true;
} else if (qName.equalsIgnoreCase("ec")) {
bec = true;
} else if (qName.equalsIgnoreCase("exch")) {
bexch = true;
} else if (qName.equalsIgnoreCase("pfcode")) {
bpfcode = true;
} else if (qName.equalsIgnoreCase("pftype")) {
bpftype = true;
} else if (qName.equalsIgnoreCase("pe")) {
bpe = true;
} else if (qName.equalsIgnoreCase("tradeqty")) {
btradeqty = true;
} else if (qName.equalsIgnoreCase("tradeprice")) {
btradeprice = true;
}
}
@Override
public void endElement(String uri, String localName, String qName) throws SAXException {
if(qName.equalsIgnoreCase("trade")) {
tradeList.add(trd);
}
}
@Override
public void characters(char ch[], int start, int length) throws SAXException {
if (bfirm) {
//age element, set Employee age
trd.setFirm(new String(ch, start, length));
bfirm = false;
} else if (bacctId) {
trd.setAcctId(new String(ch, start, length));
bacctId = false;
} else if (bUserId) {
trd.setUserId(new String(ch, start, length));
bUserId = false;
} else if (bseg) {
trd.setSeg(new String(ch, start, length));
bseg = false;
} else if (btradedate) {
trd.setTradedate(new String(ch, start, length));
btradedate = false;
} else if (btradetime) {
trd.setTradetime(new String(ch, start, length));
btradetime = false;
} else if (bec) {
trd.setEC(new String(ch, start, length));
bec = false;
} else if (bexch) {
trd.setExch(new String(ch, start, length));
bexch = false;
} else if (bpfcode) {
trd.setPFCode(new String(ch, start, length));
bpfcode = false;
} else if (bpftype) {
trd.setPFType(new String(ch, start, length));
bpftype = false;
} else if (bpe) {
trd.setPE(new String(ch, start, length));
bpe = false;
} else if (btradeqty) {
trd.setTradeQty(new String(ch, start, length));
btradeqty = false;
} else if (btradeprice) {
trd.setTradePrice(new String(ch, start, length));
btradeprice = false;
// bmore = false;
}
}
}
這是我的xml文件的示例
<?xml version="1.0"?>
<XMLFiletoparse>
<created>201311290419</created>
<pointInTime>
<date>20131129</date>
<portfolio>
<firm>999</firm>
<acctId>1234G5689</acctId>
<UserId>11AA</UserId>
<seg>ABC</seg>
<trade>
<tradeDate>20131129</tradeDate>
<tradeTime>08:30:00</tradeTime>
<ec>ABC</ec>
<exch>ABC</exch>
<pfCode>AB</pfCode>
<pfType>XYZ</pfType>
<pe>201403</pe>
<tradeQty>0</tradeQty>
<tradePrice>1.11111</tradePrice>
</trade>
<trade>
<tradeDate>20131129</tradeDate>
<tradeTime>08:30:00</tradeTime>
<ec>ABC</ec>
<exch>ABC</exch>
<pfCode>AB</pfCode>
<pfType>XYZ</pfType>
<pe>201403</pe>
<tradeQty>10</tradeQty>
<tradePrice>2.22222</tradePrice>
</trade>
</portfolio>
<portfolio>
<firm>888</firm>
<acctId>454588784KI</acctId>
<UserId>LMNO3</UserId>
<seg>ABC</seg>
<trade>
<tradeDate>20131129</tradeDate>
<tradeTime>08:31:08</tradeTime>
<ec>ABC</ec>
<exch>ABC</exch>
<pfCode>AB</pfCode>
<pfType>XYZ</pfType>
<pe>201403</pe>
<tradeQty>6</tradeQty>
<tradePrice>3.58965</tradePrice>
</trade>
</portfolio>
</pointInTime>
</XMLFiletoparse>
這是投資組合類
import java.io.Serializable;
public class Portfolio implements Serializable {
private String date = null;
private String firm = null;
private String acctId = null;
private String UserId = null;
private String seg = null;
private String tradedate = null;
private String tradetime = null;
private String ec = null;
private String exch = null;
private String pfcode = null;
private String pftype = null;
private String pe = null;
private String tradeqty = null;
private String tradeprice = null;
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getFirm() {
return firm;
}
public void setFirm(String firm) {
this.firm = firm;
}
public String getAcctId() {
return acctId;
}
public void setAcctId(String acctId) {
this.acctId = acctId;
}
public String getUserId() {
return UserId;
}
public void setUserId(String UserId) {
this.UserId = UserId;
}
public String getSeg() {
return seg;
}
public void setSeg(String seg) {
this.seg = seg;
}
public String getTradedate() {
return tradedate;
}
public void setTradedate(String tradedate) {
this.tradedate = tradedate;
}
public String getTradetime() {
return tradetime;
}
public void setTradetime(String tradetime) {
this.tradetime = tradetime;
}
public String getEC() {
return ec;
}
public void setEC(String ec) {
this.ec = ec;
}
public String getExch() {
return exch;
}
public void setExch(String exch) {
this.exch = exch;
}
public String getPFCode() {
return pfcode;
}
public void setPFCode(String pfcode) {
this.pfcode = pfcode;
}
public String getPFType() {
return pftype;
}
public void setPFType(String pftype) {
this.pftype = pftype;
}
public String getPE() {
return pe;
}
public void setPE(String pe) {
this.pe = pe;
}
public String getTradeQty() {
return tradeqty;
}
public void setTradeQty(String tradeqty) {
this.tradeqty = tradeqty;
}
public String getTradePrice() {
return tradeprice;
}
public void setTradePrice(String tradeprice) {
this.tradeprice = tradeprice;
}
@Override
public String toString() {
return "Date: " + this.date + " Firm: " + this.firm + " Acct ID: " + this.acctId + " User ID: " + this.UserId +
" Seg: " + this.seg + " tradedate: " + this.tradedate + " tradetime: " + this.tradetime +
" EC: " +this.ec+ " Exch: " +this.exch+ " PFCode: " +this.pfcode+ " PFType: " +this.pftype+
" PE: " + this.pe + " Trade Qty: " + tradeqty + " Trade Price: " + tradeprice;
}
2 個解決方案
解決方案1
1 已采納 2013-12-03 17:48:11
如果portfolio有多個trade節點，您只會看到最后一個子節點的結果，因為您在遇到portfolio標簽后正在初始化trd ，並且看來它只能存儲有關1 trade 。 因此，當有2個或更多的trade標簽時，同一portfolio對象將被修改。 現在，由於Java在后台使用按引用調用工作，因此您添加到列表中的對象也將作為trd更新，並且列表中的對象指向同一內存區域。
您的問題可能有兩種解決方案：
1.修改Portfolio類別以存儲多個trade數據。 （這應該是基於您的XML結構的實現）
2. else if (qName.equalsIgnoreCase("trade"))在else if (qName.equalsIgnoreCase("trade"))移動trd = new Portfolio() else if (qName.equalsIgnoreCase("trade"))
解決方案2
0 2013-12-17 17:26:15
我要發布更新的投資組合類。 實際上，我必須將父節點值保存到變量中，並將其與子節點變量一起傳遞，以將其插入數據庫中，並且所有字段均填充有正確的數據。 僅當到達下一個父節點時，父節點的變量才會更新為新值。 這樣可以保持數據的正確性。 包risk_mgnt_manager;
import java.io.Serializable;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Date;
import java.util.List;
public class Portfolio implements Serializable {
final private static String JDBC_CONNECTION_URL = "com.mysql.jdbc.Driver";
final private static String DB_URL = "jdbc:mysql://123.456.789.123/DB_Name";
final private static String USER = "user";
final private static String PASS = "pass";
private Connection connection;
private String firm = null;
private String acctId = null;
private String UserId = null;
private String seg = null;
private String tradedate = null;
private String tradetime = null;
private String ec = null;
private String exch = null;
private String pfcode = null;
private String pftype = null;
private String pe = null;
private String tradeqty = null;
private String tradeprice = null;
private String ffirm = null;
private String facctId = null;
private String fUserId = null;
private String fseg = null;
private String ftradedate = null;
private String ftradetime = null;
private String fec = null;
private String fexch = null;
private String fpfcode = null;
private String fpftype = null;
private String fpe = null;
private String ftradeqty = null;
private String ftradeprice = null;
private List results;
//parent nodes with if else statements check if there is new value for variable
public String getFirm() {
return firm;
}
public void setFirm(String firm) {
this.firm = firm;
if(firm == null){
ffirm = ffirm;
} else {
ffirm = firm;
}
}
public String getAcctId() {
return acctId;
}
public void setAcctId(String acctId) {
this.acctId = acctId;
if(acctId == null){
facctId = facctId;
} else {
facctId = acctId;
}
}
public String getUserId() {
return UserId;
}
public void setUserId(String UserId) {
this.UserId = UserId;
if(UserId == null){
fUserId = fUserId;
} else {
fUserId = UserId;
}
}
public String getSeg() {
return seg;
}
public void setSeg(String seg) {
this.seg = seg;
if(seg == null){
fseg = fseg;
} else {
fseg = seg;
}
}
// no if else statement from here on out. this is the child node data and
// it is always present
public String getTradedate() {
return tradedate;
}
public void setTradedate(String tradedate) {
this.tradedate = tradedate;
ftradedate = tradedate;
}
public String getTradetime() {
return tradetime;
}
public void setTradetime(String tradetime) {
this.tradetime = tradetime;
ftradetime = tradetime;
}
public String getEC() {
return ec;
}
public void setEC(String ec) {
this.ec = ec;
fec = ec;
}
public String getExch() {
return exch;
}
public void setExch(String exch) {
this.exch = exch;
fexch = exch;
}
public String getPFCode() {
return pfcode;
}
public void setPFCode(String pfcode) {
this.pfcode = pfcode;
fpfcode = pfcode;
}
public String getPFType() {
return pftype;
}
public void setPFType(String pftype) {
this.pftype = pftype;
fpftype = pftype;
}
public String getPE() {
return pe;
}
public void setPE(String pe) {
this.pe = pe;
fpe = pe;
}
public String getTradeQty() {
return tradeqty;
}
public void setTradeQty(String tradeqty) {
this.tradeqty = tradeqty;
ftradeqty = tradeqty;
}
public String getTradePrice() {
return tradeprice;
}
public void setTradePrice(String tradeprice) {
this.tradeprice = tradeprice;
ftradeprice = tradeprice;
// data from parser is sent to list
toList(ffirm,facctId,fUserId,fseg,ftradedate,tradetime,fec,fexch,
fpfcode,fpftype,fpe,ftradeqty,ftradeprice);
}
/*
This will ultimately be the setup to import the list into my database
I only printed the results to make sure I am getting the correct output
*/
public void toList(String a,String b,String c,String d,String e,String f,
String g,String h,String i,String j,String k,String l,String m){
importData(ffirm,facctId,fUserId,fseg,ftradedate,tradetime,fec,fexch,
fpfcode,fpftype,fpe,ftradeqty,ftradeprice);
}
// public void importData(final List<String> results){
public void importData(String firm,String acctid,String userid,String seg,String trdDate,String trdTime,
String ec,String exch,String pfcode,String pftype,String pe,String trdQty,String trdPrice){
connection = null;
try {
Class.forName(JDBC_CONNECTION_URL);
connection = DriverManager.getConnection(DB_URL,USER,PASS);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
String query = "INSERT INTO t_datarlt_trades_wrk (Firm, AcctId, UserID"
+ ", seg, tradedate, tradetime, ec, exch, pfcode, pftype, pe"
+ ", tradeqty, tradeprice) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?)";
try{
//STEP 2: Register JDBC driver
Class.forName("com.mysql.jdbc.Driver");
//STEP 3: Open a connection
connection.setAutoCommit(false);
PreparedStatement stmt = connection.prepareStatement(query);
// for(String result : results){
stmt.setString(1, firm);
stmt.setString(2, acctid);
stmt.setString(3, userid);
stmt.setString(4, seg);
stmt.setString(5, trdDate);
stmt.setString(6, trdTime);
stmt.setString(7, ec);
stmt.setString(8, exch);
stmt.setString(9, pfcode);
stmt.setString(10, pftype);
stmt.setString(11, pe);
stmt.setString(12, trdQty);
stmt.setString(13, trdPrice);
stmt.addBatch();
// }
stmt.executeBatch();
connection.commit();
//STEP 6: Clean-up environment
stmt.close();
connection.close();
} catch(SQLException sqle) {
System.out.println("SQLException : " + sqle);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
如何根據給定條件使用sax或dom解析xml的某些特定節點
[英]how to parse some specific nodes of xml using sax or dom based on given condition
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