JasperReport

Posted 2022-10-17

介绍

本文介绍报表工具JasperReport。 

示例

[codesyntax lang="java"]

package org.suren.demo.jasperreport;

import java.awt.Desktop;
import java.io.File;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.HashMap;

import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;

import org.junit.BeforeClass;

/**
 * JasperReport测试</br>
 * 本demo使用mysql作为数据源，填充到JasperReport模板中，最后导出报表。
 * @author suren
 * @date 2016年8月26日 下午5:18:39
 */
public class JasperReportTest

  /** 填充后的数据文件路径 */
  private static String jrprintPath;

  /**
   * 向模板中填充数据
   * @throws Exception
   */
  @BeforeClass
  public static void fill() throws Exception
  
    File reportFile = new File("MyReports", "Blank_A4.jasper");
    jrprintPath = JasperFillManager.fillReportToFile(
      reportFile.getAbsolutePath(), 
      new HashMap<String, Object>(), 
      getDemoConnection()
      );
    
    System.out.println(jrprintPath);
  
  
  /**
   * 导出html格式报表
   * @throws Exception
   */
  @org.junit.Test
  public void htmlExport() throws Exception
  
    String htmlPath = JasperExportManager.exportReportToHtmlFile(jrprintPath);
    
    System.out.println(htmlPath);
    
    Desktop.getDesktop().open(new File(htmlPath));
  
  
  /**
   * 数据库连接
   * @return
   * @throws JRException
   */
  private static Connection getDemoConnection() throws JRException
  
    Connection conn;

    try
    
      String driver = "com.mysql.jdbc.Driver";
      String connectString = "jdbc:mysql://localhost/surenpi";
      String user = "root";
      String password = "root";


      Class.forName(driver);
      conn = DriverManager.getConnection(connectString, user, password);
    
    catch (ClassNotFoundException e)
    
      throw new JRException(e);
    
    catch (SQLException e)
    
      throw new JRException(e);
      
    

    return conn;
  


 
[/codesyntax]
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