Struts 2 和 Jasper Report 集成示例

转x33g5p2x  于2021-10-21 转载在 Java  
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这个 struts 2 教程解释了如何在你的动态 web 应用程序中集成 Jasper iReport 来生成 PDF 报告。在开始编码之前，我们需要在 Struts 2 项目中包含 Jasper iReport JAR 依赖项。

使用的软件

  1. Eclipse
  2. MySQL Database
  3. JDK 8
  4. Tomcat 8
  5. iReport-5.6.0

必需的 jars

Struts 2 和 Jasper iReport 集成需要这些 jar 文件。

  1. asm-3.3.jar
  2. asm-commons-3.3.jar
  3. asm-tree-3.3.jar
    1.commons-beanutils-1.8.0.jar
    1.commons-collections-3.1.jar
    1.commons-digester-2.0.jar
    1.commons-fileupload-1.2.2.jar
    1.commons-logging-api-1.1.jar
    1.commons-io-2.0.1.jar
    1.commons-lang-2.5.jar
    1.commons-logging-1.1.3.jar
    1.freemarker-2.3.18.jar
  4. jasperreports-5.6.0.jar
  5. jasperreports-javaflow-5.6.0.jar
    1.javassist-3.11.0.GA.jar
    1.ognl-3.0.4.jar
  6. struts2-core-2.3.1.2.jar
  7. xwork-core-2.3.1.2.jar
  8. mysql-connector-java-5.1.38-bin

Eclipse 中的项目结构

如何开始编码

有时先写哪个代码或如何开始编码很重要？要让您的代码无错误，请按照以下步骤操作……

步骤- 1： 第一步是创建表脚本。

CREATE TABLE `pdfreport` (
  `NAME` varchar(20) DEFAULT NULL,
  `EMAIL` varchar(50) DEFAULT NULL,
  `MOBILE` varchar(12) DEFAULT NULL,
  `COLLEGE` varchar(50) DEFAULT NULL,
  `COURSE` varchar(10) DEFAULT NULL,
  `SKILLS` varchar(100) DEFAULT NULL,
  `MARKS1` int(3) DEFAULT NULL,
  `MARKS2` int(3) DEFAULT NULL,
  `MARKS3` int(3) DEFAULT NULL
);

第 2 步： 设计您的报告。

学生报告.jrxml

<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd"
	name="studentReport" pageWidth="595" pageHeight="842" columnWidth="555"
	leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20"
	uuid="ba63635c-ad40-41b0-9974-2f6d4d62ac4e">
	<property name="ireport.zoom" value="1.0" />
	<property name="ireport.x" value="0" />
	<property name="ireport.y" value="0" />
	<parameter name="logo" class="java.lang.String" />
	<queryString>
		<![CDATA[]]>
	</queryString>
	<field name="NAME" class="java.lang.String">
		<fieldDescription><![CDATA[]]>
		</fieldDescription>
	</field>
	<field name="email" class="java.lang.String">
		<fieldDescription><![CDATA[]]>
		</fieldDescription>
	</field>
	<field name="mobile" class="java.lang.String">
		<fieldDescription><![CDATA[]]>
		</fieldDescription>
	</field>
	<field name="college" class="java.lang.String">
		<fieldDescription><![CDATA[]]>
		</fieldDescription>
	</field>
	<field name="course" class="java.lang.String">
		<fieldDescription><![CDATA[]]>
		</fieldDescription>
	</field>
	<field name="skills" class="java.lang.String">
		<fieldDescription><![CDATA[]]>
		</fieldDescription>
	</field>
	<field name="marks1" class="java.lang.Integer">
		<fieldDescription><![CDATA[]]>
		</fieldDescription>
	</field>
	<field name="marks2" class="java.lang.Integer">
		<fieldDescription><![CDATA[]]>
		</fieldDescription>
	</field>
	<field name="marks3" class="java.lang.Integer">
		<fieldDescription><![CDATA[]]>
		</fieldDescription>
	</field>
	<background>
		<band splitType="Stretch" />
	</background>
	<title>
		<band height="79" splitType="Stretch">
			<image>
				<reportElement x="0" y="0" width="208" height="59"
					uuid="5dfbe355-b454-49e2-a674-d44dac7559c1" />
				<imageExpression><![CDATA[$P{logo}]]></imageExpression>
			</image>
			<line>
				<reportElement x="0" y="69" width="552" height="2"
					forecolor="#FFFF00" uuid="fb69bdb0-2581-4077-9048-32a081feac19" />
			</line>
		</band>
	</title>
	<pageHeader>
		<band height="35" splitType="Stretch">
			<staticText>
				<reportElement mode="Opaque" x="0" y="0" width="552"
					height="35" backcolor="#CCCCCC" uuid="0baae80b-49e8-4cc1-84e5-84c4dc4deccc" />
				<textElement textAlignment="Center">
					<font size="26" />
				</textElement>
				<text><![CDATA[Student Reports]]></text>
			</staticText>
		</band>
	</pageHeader>
	<columnHeader>
		<band height="41" splitType="Stretch" />
	</columnHeader>
	<detail>
		<band height="123" splitType="Stretch">
			<textField>
				<reportElement x="0" y="71" width="185" height="20"
					uuid="45be6758-b007-4fc8-bed2-d805dd1212a1" />
				<box>
					<pen lineWidth="0.25" />
					<topPen lineWidth="0.25" />
					<leftPen lineWidth="0.25" />
					<bottomPen lineWidth="0.25" />
					<rightPen lineWidth="0.25" />
				</box>
				<textElement textAlignment="Center" />
				<textFieldExpression><![CDATA[$F{marks1}]]></textFieldExpression>
			</textField>
			<textField>
				<reportElement x="185" y="71" width="185" height="20"
					uuid="e2900688-a1e6-4bd6-824f-1fec11357fa2" />
				<box>
					<pen lineWidth="0.25" />
					<topPen lineWidth="0.25" />
					<leftPen lineWidth="0.25" />
					<bottomPen lineWidth="0.25" />
					<rightPen lineWidth="0.25" />
				</box>
				<textElement textAlignment="Center" />
				<textFieldExpression><![CDATA[$F{marks2}]]></textFieldExpression>
			</textField>
			<textField>
				<reportElement x="370" y="71" width="185" height="20"
					uuid="e948ed81-1b35-4801-972a-cb3721978c6b" />
				<box>
					<pen lineWidth="0.25" />
					<topPen lineWidth="0.25" />
					<leftPen lineWidth="0.25" />
					<bottomPen lineWidth="0.25" />
					<rightPen lineWidth="0.25" />
				</box>
				<textElement textAlignment="Center" />
				<textFieldExpression><![CDATA[$F{marks3}]]></textFieldExpression>
			</textField>
			<staticText>
				<reportElement mode="Opaque" x="0" y="51" width="185"
					height="20" backcolor="#CCCCCC" uuid="1d29d647-fff0-4523-b12e-a9b9ee1e7f85" />
				<box>
					<pen lineWidth="0.25" />
					<topPen lineWidth="0.25" />
					<leftPen lineWidth="0.25" />
					<bottomPen lineWidth="0.25" />
					<rightPen lineWidth="0.25" />
				</box>
				<textElement textAlignment="Center">
					<font isBold="true" />
				</textElement>
				<text><![CDATA[Subject 1]]></text>
			</staticText>
			<staticText>
				<reportElement mode="Opaque" x="185" y="51" width="185"
					height="20" backcolor="#CCCCCC" uuid="be9225ad-4eea-49a9-aa82-20ee92ad365c" />
				<box>
					<pen lineWidth="0.25" />
					<topPen lineWidth="0.25" />
					<leftPen lineWidth="0.25" />
					<bottomPen lineWidth="0.25" />
					<rightPen lineWidth="0.25" />
				</box>
				<textElement textAlignment="Center">
					<font isBold="true" />
				</textElement>
				<text><![CDATA[Subject 2]]></text>
			</staticText>
			<staticText>
				<reportElement mode="Opaque" x="370" y="51" width="185"
					height="20" backcolor="#CCCCCC" uuid="ccd258aa-657e-44d3-8462-79c384616791" />
				<box>
					<pen lineWidth="0.25" />
					<topPen lineWidth="0.25" />
					<leftPen lineWidth="0.25" />
					<bottomPen lineWidth="0.25" />
					<rightPen lineWidth="0.25" />
				</box>
				<textElement textAlignment="Center">
					<font isBold="true" />
				</textElement>
				<text><![CDATA[Subject 3]]></text>
			</staticText>
			<textField>
				<reportElement x="0" y="20" width="92" height="20"
					uuid="fc8f42e0-0ae0-493e-9a4f-3e695d71be7e" />
				<textElement textAlignment="Center" />
				<textFieldExpression><![CDATA[$F{NAME}]]></textFieldExpression>
			</textField>
			<textField>
				<reportElement x="92" y="20" width="92" height="20"
					uuid="a56767ed-655c-4cb4-b9b2-3a0bfb1a0a26" />
				<textElement textAlignment="Center" />
				<textFieldExpression><![CDATA[$F{email}]]></textFieldExpression>
			</textField>
			<textField>
				<reportElement x="184" y="20" width="92" height="20"
					uuid="193b7881-25dc-445f-af6a-f26232466fa3" />
				<textElement textAlignment="Center" />
				<textFieldExpression><![CDATA[$F{mobile}]]></textFieldExpression>
			</textField>
			<textField>
				<reportElement x="276" y="20" width="92" height="20"
					uuid="abc9a75c-5118-4172-be15-7ad75414095d" />
				<textElement textAlignment="Center" />
				<textFieldExpression><![CDATA[$F{college}]]></textFieldExpression>
			</textField>
			<textField>
				<reportElement x="368" y="20" width="92" height="20"
					uuid="2b350d01-3274-43ae-8bd4-c3feaf277b69" />
				<textElement textAlignment="Center" />
				<textFieldExpression><![CDATA[$F{course}]]></textFieldExpression>
			</textField>
			<textField>
				<reportElement x="460" y="20" width="92" height="20"
					uuid="1239ea7f-5ca4-4aa4-80d3-9d1f4c3dad06" />
				<textElement textAlignment="Center" />
				<textFieldExpression><![CDATA[$F{skills}]]></textFieldExpression>
			</textField>
			<staticText>
				<reportElement mode="Opaque" x="0" y="0" width="92"
					height="20" backcolor="#CCCCCC" uuid="a0f72a52-fdac-49cd-9845-ea82ca2b7d93" />
				<textElement textAlignment="Center">
					<font isBold="true" />
				</textElement>
				<text><![CDATA[NAME]]></text>
			</staticText>
			<staticText>
				<reportElement mode="Opaque" x="92" y="0" width="92"
					height="20" backcolor="#CCCCCC" uuid="0d30c4d9-52ed-4965-815e-4fa98dc98b87" />
				<textElement textAlignment="Center">
					<font isBold="true" />
				</textElement>
				<text><![CDATA[Email]]></text>
			</staticText>
			<staticText>
				<reportElement mode="Opaque" x="184" y="0" width="92"
					height="20" backcolor="#CCCCCC" uuid="68f75f19-987f-4f38-a307-38f35a819608" />
				<textElement textAlignment="Center">
					<font isBold="true" />
				</textElement>
				<text><![CDATA[Mobile]]></text>
			</staticText>
			<staticText>
				<reportElement mode="Opaque" x="276" y="0" width="92"
					height="20" backcolor="#CCCCCC" uuid="ed266987-3428-446d-881d-ba7057107025" />
				<textElement textAlignment="Center">
					<font isBold="true" />
				</textElement>
				<text><![CDATA[College]]></text>
			</staticText>
			<staticText>
				<reportElement mode="Opaque" x="368" y="0" width="92"
					height="20" backcolor="#CCCCCC" uuid="12906bc7-1143-4064-bf6c-fc2c38c9b58c" />
				<textElement textAlignment="Center">
					<font isBold="true" />
				</textElement>
				<text><![CDATA[Course]]></text>
			</staticText>
			<staticText>
				<reportElement mode="Opaque" x="460" y="0" width="92"
					height="20" backcolor="#CCCCCC" uuid="ebba8c0c-fcfc-424d-844c-8d5ca576b05d" />
				<textElement textAlignment="Center">
					<font isBold="true" />
				</textElement>
				<text><![CDATA[Skills]]></text>
			</staticText>
			<line>
				<reportElement x="0" y="107" width="552" height="1"
					uuid="2221b6a3-4dbc-4719-ac8b-14e9313f4463" />
			</line>
		</band>
	</detail>
	<columnFooter>
		<band splitType="Stretch" />
	</columnFooter>
	<pageFooter>
		<band height="1" splitType="Stretch" />
	</pageFooter>
	<summary>
		<band splitType="Stretch" />
	</summary>
</jasperReport>

步骤– 3： 在项目 lib 文件夹中包含所有必需的 jar。

步骤– 4: 在 web.xml 中添加 Struts 2 过滤器

web.xml

<web-app>
        <display-name>Struts2JasperReportIntegration</display-name>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

步骤 – 5： 创建 a DAO 类。

报告DAO.java

package org.websparrow;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

public class ReportDAO {

	public ResultSet getPdf() {

		try {
			Class.forName("com.mysql.jdbc.Driver");
			Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb", "root", "");
			String query = "SELECT NAME, email, mobile, college, course, skills, marks1, marks2, marks3 FROM pdfreport";
			Statement stmt = con.createStatement();
			ResultSet rs = stmt.executeQuery(query);

			return rs;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}

	}

}

**步骤– 6：**创建Action 类。

ReportAction.java

package org.websparrow;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.sql.ResultSet;
import java.util.HashMap;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

import net.sf.jasperreports.engine.JRResultSetDataSource;
import net.sf.jasperreports.engine.JasperCompileManager;
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;

public class ReportAction extends ActionSupport {

	public ResultSet rs = null;
	public String submit = null;
	public InputStream fileInputStream;
	public String jasperPath = "";
	public String pdfName = "";
	public String rpt = "";

        //Generate Getters and Setters... 

	@Override
	public String execute() throws Exception {
		try {
			if (submit.equals("pdf")) {
				rs = new ReportDAO().getPdf();
				jasperPath = ServletActionContext.getServletContext().getRealPath("/Reports");
				pdfName = "Student Report";
				rpt = "studentReport.jrxml";
				JRResultSetDataSource resultSetDataSource = new JRResultSetDataSource(rs);
				HashMap<String, Object> pm = new HashMap<String, Object>();
				String logo = jasperPath + "/ws.jpg";
				pm.put("logo", logo);
				JasperReport jr = JasperCompileManager.compileReport(jasperPath + "/" + rpt);
				JasperPrint jp = JasperFillManager.fillReport(jr, pm, resultSetDataSource);
				JasperExportManager.exportReportToPdfFile(jp, jasperPath + pdfName + ".pdf");
				fileInputStream = new FileInputStream(new File(jasperPath + pdfName + ".pdf"));

			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return "SUCCESS";

	}	
}

第 7 步： 设计您的 User Interface 页面。

索引.jsp

<%@taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
<style type="text/css">
button {
	background-color: #008CBA;
	border: none;
	color: white;
	padding: 15px 32px;
	text-align: center;
	text-decoration: none;	
	display: inline-block;
	font-size: 16px;
	border-radius: 12px;
}
</style>
</head>
<body style="text-align: center;">
	<h1>Struts2 and Jasper iReport Integration Example</h1>
	<form method="POST" name="rpt" action="StudentReport.action">

		<button type="submit" name="submit" value="pdf">Generate Report</button>

	</form>
</body>
</html>

步骤– 8: 映射 struts.xml 中的 Action 类

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
	<constant name="struts.devMode" value="true" />
	<package name="default" extends="struts-default" namespace="/">
		<action name="StudentReport" class="org.websparrow.ReportAction">
			<result name="SUCCESS" type="stream">
				<param name="contentType">application/octet-stream</param>
				<param name="inputName">fileInputStream</param>
				<param name="contentDisposition">attachment;filename="${pdfName}.pdf"</param>
				<param name="bufferSize">1024</param>
			</result>
		</action>
	</package>
</struts>

第 9 步： 最后一切都完成了，现在启动您的服务器并运行项目。

输出 ：

找到用于测试应用程序的 URL localhost:8080/Struts2JasperReportIntegration/。我们将得到如下所示的输出。

Screen 1

Screen 2

Screen 3

版权说明 : 本文为转载文章, 版权归原作者所有 版权申明

原文链接 : https://www.websparrow.org/struts/struts2-and-jasper-ireport-integration-example

内容来源于网络，如有侵权，请联系作者删除！

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