您好我正在尝试读取读取表名和列名以进行 sql 查询以进行测试验证
我有一个 .ctl 文件，其中包含如图所示的表格详细信息
LOAD DATA APPEND
INTO TABLE ALM_LAV_CD_BSTG
FIELDS TERMINATED BY '~~'
TRAILING NULLCOLS
(
ALM_VERS_ID DECIMAL EXTERNAL NULLIF (ALM_VERS_ID=BLANKS)
, LAV_CD CHAR NULLIF (LAV_CD=BLANKS)
, LAV_CD_OFSE INTEGER EXTERNAL NULLIF (LAV_CD_OFSE=BLANKS)
, LAV_CD_AMT DECIMAL EXTERNAL NULLIF (LAV_CD_AMT=BLANKS)
, EXPRT_DT DATE "YYYY-MM-DD"
, DUA_INSRT_ID CHAR NULLIF (DUA_INSRT_ID=BLANKS)
, DUA_INSRT_TMSTP TIMESTAMP "YYYY-MM-DD HH24:MI:SS.FF6"
, DUA_UPDT_ID CHAR NULLIF (DUA_UPDT_ID=BLANKS)
, DUA_UPDT_TMSTP TIMESTAMP "YYYY-MM-DD HH24:MI:SS.FF6"
, DUA_VERS_NBR DECIMAL EXTERNAL NULLIF (DUA_VERS_NBR=BLANKS)
) 我的要求是将表名读入字符串和列名，忽略 EXPRT_DT 成字符串
我的代码如下
package com.cf.ODSAutomation;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.filechooser.FileNameExtensionFilter;
public class ReadControlFile {
public static void main(String[] args) throws Exception {
// Control Files Folder Path
File path = new File("C:\\ODS\\control_File");
final FileNameExtensionFilter extensionFilter = new FileNameExtensionFilter("Control Files", "ctl");
File[] files = path.listFiles();
System.out.println("Number of Control Files : " + files.length);
// Looping the files in the folder
for (final File file : path.listFiles()) {
if (extensionFilter.accept(file)) {
System.out.println("File Name : " + file.getName().trim());
BufferedReader reader = new BufferedReader(new FileReader(file));
StringBuilder builder = new StringBuilder();
String currentLine = reader.readLine();
while (currentLine != null) {
builder.append(currentLine);
builder.append("\n");
currentLine = reader.readLine();
}
// Appending all lines into single line
System.out.println(builder.toString());
// Getting Table Name
String temp[] = builder.toString().split("TABLE ");
String temp1[] = temp[1].split("_BSTG");
String TableName = temp1[0].trim();
System.out.println("Table Name : " + TableName);
Pattern p = Pattern.compile("[a-zA-Z]+_*");
Matcher m1 = p.matcher(temp[1]);
System.out.println("Words from string \"" + temp[1] + "\" : ");
while (m1.find()) {
System.out.println(m1.group());
}
reader.close();
}
}
}
}我可以使用 Strings 类读取表名，但无法获取列名。
我的愿望结果是将列名附加在一个用逗号分隔的字符串中，如下所示
ALM_VERS_ID，LAV_CD，LAV_CD_OFSE，LAV_CD_AMT，EXPRT_DT，DUA_INSRT_ID，DUA_INSRT_TMSTP，DUA_UPDT_ID，DUA_UPDT_TMSTP，DUA_VERS_NBR
目前我的结果是
ALM_ LAV_ CD_ BSTG FIELDS TERMINATED BY TRAILING NULLCOLS ALM_ VERS_ ID DECIMAL EXTERNAL NULLIF ALM_ VERS_ ID BLANKS LAV_ CD CHAR NULLIF LAV_ CD BLANKS LAV_ CD_ OFSE INTEGER EXTERNAL NULLIF LAV_ CD_ OFSE BLANKS LAV_ CD_ CD_ AMT 十进制外部 NULL IF LAV_ CD_ AMT BLANKS MM DD DUA_ INSRT_ ID CHAR NULLIF DUA_ INSRT_ ID BLANKS DUA_ INSRT_ TMSTP TIMESTAMP YYYY MM DD HH MI SS FF DUA_ UPDT_ ID CHAR NULLIF DUA_ UPDT_ ID BLANKS DUA_ UPDT_ TMSTP TIMESTAMP YYYY MM DD HH MI SS FF DUA_VERS_NBR DECIMAL DUA_ DUA NULL丁腈橡胶毛坯