Iterator cellIterator = nextRow.cellIterator() RowIterator.next() // skip the header row PreparedStatement statement = connection.prepareStatement(sql) String sql = "INSERT INTO students (name, enrolled, progress) VALUES (?, ?, ?)" Iterator rowIterator = erator() Ĭonnection = DriverManager.getConnection(jdbcURL, username, password) Sheet firstSheet = workbook.getSheetAt(0) Workbook workbook = new XSSFWorkbook(inputStream) String jdbcURL = "jdbc:mysql://localhost:3306/sales" įileInputStream inputStream = new FileInputStream(excelFilePath) * Sample Java program that imports data from an Excel file to MySQL database. Suppose that your project uses Maven, so add the following dependency to the pom.xml file: Īnd to insert data to MySQL database from Java, we need to use a dependency for MySQL JDBC driver: Īnd below is the full code of the sample program that reads data from the Excel file and insert that data to MySQL database: package net.codejava ) Note that the data type of the enrolledcolumn is timestamp so it can hold both date and time values.To read the Excel file from Java, we can use the Apache POI library. So let’s create a corresponding table in the database with the following structure: You can run the following MySQL script to create this table: CREATE TABLE `students` ( So in this post, I will share with you a sample Java program that reads data from an Excel file and inserts that data to a MySQL database.Suppose that we have an Excel file that stores information about students enrolled in courses like this: As you can see, this Excel file has only one sheet and the student information is stored in 3 columns: Student Name (text), Enrolled (date time) and Progress (number). Importing data from Excel to database is a common task of a software program. How to implement remember password feature.How to implement forgot password feature.How to read password-protected Excel file in Java.Java File Encryption and Decryption Example.Compile and run a Java program with Sublime Text.Compile and Run a Java Program with TextPad.File Upload to Database with Spring and Hibernate.File Upload to Database with Servlet, JSP, MySQL.Java Servlet and JSP Hello World Tutorial.read_parquet ( 'plant_anot_db.parquet', columns = ) df. 1 hypothetical protein VITISV_022672 # read only ID columnĭf = pd. 1 putative pentatricopeptide repeat - containing p. read_parquet ( 'plant_anot_db.parquet' ) df # output Import pandas as pd # read the table with 18M rows as Parquet fileĭf = pd. Parquet greatly reduces the storage requirement and is much faster in run time.I/O (by reading only required columns from large files) CSV, TSV), the Parquet file is optimized for query performance and requires less Apache Parquet is a columnar-based self-describing (with metadata) file format mostly used in the Hadoop ecosystem.to_parquet ( 'plant_anot_db.parquet' ) Import Apache Parquet file 1 hypothetical protein VITISV_022672 # save CSV or TSV file to Parquet formatĬom_df. read_csv ( 'plant_anot_db.txt', chunksize = 1000000 ) # Note: df is a TextFileReader object and not a dataframeĬom_df = pd. Import pandas as pd # read the table with 18M rows as chunks of 1M rows at a timeĭf = pd.
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