Java 使try-catch语句识别各种错误
您好,我正在使用JAVA,制作一个swt应用程序,可以直接从文本文件插入数据库。我正在努力完成应用程序的最后部分,即错误检测部分。我可以很好地插入数据库,它会在应该插入的地方给出一个错误。我想做的是,如果有多个错误,它会指出有多个错误,而不仅仅是一个。现在,我的代码仍然在数据库中插入文本文件的正确行,并且没有插入错误的行,但它只标记了一个错误。有没有一种方法可以在catch子句周围放置if语句,或者有没有一种更有效的方法来识别多个错误??我想对所有SQL异常(如错误的字段、错误的值类型等)执行此操作Java 使try-catch语句识别各种错误,java,sql,exception,try-catch,Java,Sql,Exception,Try Catch,您好,我正在使用JAVA,制作一个swt应用程序,可以直接从文本文件插入数据库。我正在努力完成应用程序的最后部分,即错误检测部分。我可以很好地插入数据库,它会在应该插入的地方给出一个错误。我想做的是,如果有多个错误,它会指出有多个错误,而不仅仅是一个。现在,我的代码仍然在数据库中插入文本文件的正确行,并且没有插入错误的行,但它只标记了一个错误。有没有一种方法可以在catch子句周围放置if语句,或者有没有一种更有效的方法来识别多个错误??我想对所有SQL异常(如错误的字段、错误的值类型等)执行此
buttoninsert.addMouseListener(new MouseAdapter() {
@Override
public void mouseDown(MouseEvent e) {
System.out.println("create jdbc connection using properties file");
Connection con = null;
// use try becuase it tends to fail sometimes and we want error messages
try {
//load properties file we have created
Properties prop = loadPropertiesFile();
//declare vars and get the properties at the same time
String driverClass = prop.getProperty("SQLSERVERJDBC.driver");
String url = prop.getProperty("SQLSERVERJDBC.url");
String username = prop.getProperty("SQLSERVERJDBC.username");
String password = prop.getProperty("SQLSERVERJDBC.password");
// have to instance driver
Class.forName(driverClass).newInstance();
// make connection object using the previous things as parameters
con = DriverManager.getConnection(url, username, password);
//this if is to verify the connection
if (con != null) {
System.out.println("connection created successfully using properties file");
}
else {
System.out.println(" unable to create connection");
}
BufferedReader reader = new BufferedReader(new FileReader(
"C:\\Users\\darroyo\\Documents\\pruebasx.txt"));
ArrayList<String> array1 = new ArrayList<String>();
// Read line from file.
while (true) {
String line = reader.readLine();
if (line == null) {
break;
}
// Split line on space.
String[] parts = line.split("");
//part in parts
for (String part : parts) {
//part is the element in this case each fix tag with value
array1.add(part);
}
String query = " insert into FRONTMC.HECHO (folio_hecho, folio_orden, emisora, serie,"
+ "clave_sentido, titulos_hecho, precio, importe, liquidacion, contraparte, id_estatus, isin, contrato,"
+ "secondary_exec_id, exec_id, F11_ClOrdID, fecha_recepcion, fecha_sentra)"
+ " values ( ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,convert(varchar(30),cast(? as datetime),120),convert(varchar(30),cast(? as datetime),120))";
// create the mysql insert preparedstatement
PreparedStatement preparedStmt = con.prepareStatement(query);
for(int counter =0; counter< array1.size();counter++){
if(array1.get(counter).substring(0, 3).equals("37=")){
preparedStmt.setString (1, array1.get(counter).substring(3));
}
if(array1.get(counter).substring(0, 3).equals("37=")){
preparedStmt.setString (2, array1.get(counter).substring(3));
}
// change emisora and serie to 48 with bd
if(array1.get(counter).substring(0, 3).equals("49=")){
preparedStmt.setString (3, array1.get(counter).substring(3));
}
if(array1.get(counter).substring(0, 4).equals("447=")){
preparedStmt.setString (4, array1.get(counter).substring(4));
}
if(array1.get(counter).substring(0, 3).equals("54=")){
preparedStmt.setString (5, array1.get(counter).substring(3));
}
if(array1.get(counter).substring(0, 3).equals("32=")){
preparedStmt.setString (6, array1.get(counter).substring(3));
}
if(array1.get(counter).substring(0, 3).equals("31=")){
preparedStmt.setString (7, array1.get(counter).substring(3));
}
if(array1.get(counter).substring(0, 4).equals("381=")){
preparedStmt.setString (8, array1.get(counter).substring(4));
}
if(array1.get(counter).substring(0, 3).equals("63=")){
preparedStmt.setString (9, array1.get(counter).substring(3));
}
if(array1.get(counter).substring(0, 4).equals("448=")){
preparedStmt.setString (10, array1.get(counter).substring(4));
}
if(array1.get(counter).substring(0, 4).equals("150=")){
preparedStmt.setString (11, array1.get(counter).substring(4));
}
if(array1.get(counter).substring(0, 3).equals("48=")){
preparedStmt.setString (12, array1.get(counter).substring(3));
}
if(array1.get(counter).substring(0, 2).equals("1=")){
preparedStmt.setString (13, array1.get(counter).substring(2));
}
if(array1.get(counter).substring(0, 4).equals("527=")){
preparedStmt.setString (14, array1.get(counter).substring(4));
}
if(array1.get(counter).substring(0, 3).equals("17=")){
preparedStmt.setString (15, array1.get(counter).substring(3));
}
if(array1.get(counter).substring(0, 3).equals("11=")){
preparedStmt.setString (16, array1.get(counter).substring(3));
}
if(array1.get(counter).substring(0, 3).equals("52=")){
String date = array1.get(counter).substring(3);
SimpleDateFormat sdf1 = new SimpleDateFormat("yyyyMMdd");
SimpleDateFormat sdf2 = new SimpleDateFormat("dd/MM/yyyy");
String ds2 = sdf2.format(sdf1.parse(date));
String x = date.substring(9, 21);
String newfecha1 = ds2+" "+x;
preparedStmt.setString (17, newfecha1);
}
if(array1.get(counter).substring(0, 3).equals("52=")){
String date = array1.get(counter).substring(3);
SimpleDateFormat sdf1 = new SimpleDateFormat("yyyyMMdd");
SimpleDateFormat sdf2 = new SimpleDateFormat("dd/MM/yyyy");
String ds2 = sdf2.format(sdf1.parse(date));
String x = date.substring(9, 21);
String newfecha1 = ds2+" "+x;
preparedStmt.setString (18, newfecha1);
}
}
// execute the preparedstatement
preparedStmt.execute();
displaymsjfix.setText("exitoso");
}
System.out.println(array1);
reader.close();
//creating the statement(should check to use prepared statement in the future
// fecha recp y fecha sentra in query and for and ? and order
//notifies you that it was completed
System.out.println("insert complete");
// loop to check the digits ex. for() array.1get(counter).substring(0,3).equals("23=")
//error messages
}catch (SQLException eb) {
eb.printStackTrace();
}
//ERROR MESSAGE FECHA just get line number
catch (Exception eb) {
System.out.println("Error in date ");
} finally {
try {
if (con != null) {
con.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
});
buttoninsert.addMouseListener(新的MouseAdapter(){
@凌驾
公共无效mouseDown(MouseEvent e){
println(“使用属性文件创建jdbc连接”);
连接con=null;
//使用try,因为它有时会失败,我们需要错误消息
试一试{
//加载我们创建的属性文件
Properties prop=loadPropertiesFile();
//声明变量并同时获取属性
String driverClass=prop.getProperty(“SQLSERVERJDBC.driver”);
字符串url=prop.getProperty(“SQLSERVERJDBC.url”);
字符串username=prop.getProperty(“SQLSERVERJDBC.username”);
字符串password=prop.getProperty(“SQLSERVERJDBC.password”);
//必须使用实例驱动程序
类.forName(driverClass.newInstance();
//使用前面的内容作为参数创建连接对象
con=DriverManager.getConnection(url、用户名、密码);
//这是为了验证连接
如果(con!=null){
System.out.println(“使用属性文件成功创建的连接”);
}
否则{
System.out.println(“无法创建连接”);
}
BufferedReader reader=新BufferedReader(新文件读取器(
“C:\\Users\\darroyo\\Documents\\pruebasx.txt”);
ArrayList array1=新的ArrayList();
//从文件中读取行。
while(true){
字符串行=reader.readLine();
如果(行==null){
打破
}
//在空间上分割线。
String[]parts=line.split(“”);
//部分地
用于(字符串部分:部分){
//在这种情况下,part是元素,每个fix标记都有值
1.增加(部分);
}
String query=“插入FRONTMC.HECHO(对开对开、对开对开对开、对开对开对开、对开对开对开、对开对开对开、对开对开对开
+clave_Senido、Titolos_hecho、precio、importe、liquidacion、contraparte、Idu estatus、isin、contrato、
+二级执行id,执行id,F11克隆id,接收,接收
+“值(?,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,转换(varchar(30),cast(?as datetime),120),转换(varchar(30),cast(?as datetime),120));
//创建mysql insert preparedstatement
PreparedStatement preparedStmt=con.prepareStatement(查询);
对于(int counter=0;计数器List<String> exceptionList = new ArrayList<String>();
while(true)
{
//Your code
try
{
//sql statements and prepared statements
}
catch(SqlException e)
{
exceptionList.add(e.getMessage());
continue;
}
}