java - Jasper Dynamic Reports - using jasper reports to generate a report getting errors -


i want generate report database. working on jasper reporting tool , i'm getting following errors:

  exception in thread "main" java.lang.error: unresolved compilation          problems:      type cannot resolved      centeredstyle cannot resolved variable     type cannot resolved      boldstyle cannot resolved variable     type cannot resolved      centeredstyle cannot resolved variable     type cannot resolved      centeredstyle cannot resolved variable     type cannot resolved      centeredstyle cannot resolved variable      bigdecimal cannot resolved type     centeredstyle cannot resolved variable      @ project.reports.main(reports.java:36)

code:

 package project;  import java.io.filenotfoundexception; import java.io.fileoutputstream; import java.sql.connection; import java.sql.drivermanager; import java.sql.sqlexception;  import net.sf.dynamicreports.jasper.builder.jasperreportbuilder; import net.sf.dynamicreports.report.builder.dynamicreports; import net.sf.dynamicreports.report.builder.column.columns; import net.sf.dynamicreports.report.builder.column.textcolumnbuilder; import net.sf.dynamicreports.report.builder.component.components; import net.sf.dynamicreports.report.builder.datatype.datatypes; import net.sf.dynamicreports.report.constant.horizontalalignment; import net.sf.dynamicreports.report.exception.drexception; import net.sf.dynamicreports.report.builder.style.stylebuilder; import net.sf.dynamicreports.report.builder.datatype.bigdecimaltype; import net.sf.dynamicreports.report.builder.group.columngroupbuilder;  public class reports {    public static void main(string[] args) {     connection connection = null;     try {         class.forname("com.mysql.jdbc.driver");         connection = drivermanager.getconnection("jdbc:mysql://hostname:3306/project","root", "codingdevil");     } catch (sqlexception e) {         e.printstacktrace();         return;     } catch (classnotfoundexception e) {         e.printstacktrace();         return;     }      jasperreportbuilder report = dynamicreports.report();     columns col;     textcolumnbuilder<integer> rownumbercolumn = columns.reportrownumbercolumn("no.");     textcolumnbuilder<java.util.date> columndate = col.column("date", "date_of_sale", type.datetype()).setstyle(centeredstyle);     textcolumnbuilder<string>    columnitem = col.column("item name", "item_name", type.stringtype()).setstyle(boldstyle);     textcolumnbuilder<string>    columncustomer = col.column("customer name", "customer_name", type.stringtype()).setstyle(centeredstyle);     textcolumnbuilder<double>    columnunit = col.column("unit price", "item_price", type.doubletype()).setstyle(centeredstyle);     textcolumnbuilder<integer>    columnqty = col.column("qty", "item_qty", type.integertype()).setstyle(centeredstyle);     textcolumnbuilder<bigdecimal>    columnsub = columnqty.multiply(columnunit).settitle("subtotal").setstyle(centeredstyle);     report       .columns(               rownumbercolumn,columnitem,columncustomer,columndate,columnunit,columnqty,columnsub               )       .title(//title of report           components.text("simplereportexample")           .sethorizontalalignment(horizontalalignment.center))           .pagefooter(components.pagexofy())//show page number on page footer           .setdatasource("select * holidays",connection);      try {                 //show report         report.show();                  //export report pdf file         report.topdf(new fileoutputstream("c:/report.pdf"));     } catch (drexception e) {         e.printstacktrace();     } catch (filenotfoundexception e) {         e.printstacktrace();     }   } }

it seems project missing jars, , cannot understand meanings of these words, try check if have jar files need.

try use maven such in example.

add these dependencies pom.xml

<dependencies>         <!-- dynamicreports -->     <dependency>         <groupid>net.sourceforge.dynamicreports</groupid>         <artifactid>dynamicreports-core</artifactid>                     <version>3.1.3</version>     </dependency>          <!-- mysql database driver -->     <dependency>         <groupid>mysql</groupid>         <artifactid>mysql-connector-java</artifactid>         <version>5.1.25</version>     </dependency> </dependencies>

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