项目截图如下：

该项目是：Maven项目

pom.xml

4.0.0

JasperReports

JasperReports

war

0.0.1-SNAPSHOT

JasperReports Maven Webapp

http://maven.apache.org

junit

junit

3.8.1

test

net.sf.jasperreports

jasperreports

5.6.0

org.codehaus.groovy

groovy-all

2.2.2

mysql

mysql-connector-java

5.1.30

javax.servlet

servlet-api

2.5

org.apache.poi

poi

3.14

org.apache.poi

poi-ooxml

3.14

org.apache.poi

poi-ooxml-schemas

3.14

com.itextpdf

itext-asian

5.1.0

net.sourceforge.javydreamercsw

JasperReport

0.1

com.jaspersoft

ireport

1.0.0

com.itextpdf

itextpdf

5.1.0

JasperReports

DbReport.jrxml 如下：

Jdbc.java 如下：

package com.accord.dao;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.Statement;

public class Jdbc {

public static String driver="com.mysql.jdbc.Driver";

public static String url="jdbc:mysql://localhost:3306/db_studentinfo";

public static String user="root";

public static String pwd="123456";

public static Connection conn= getConnection();

public static Statement statement= getStatement();

public static Connection getConnection(){

if(conn==null){

try{

Class.forName(driver);

conn=DriverManager.getConnection(url,user,pwd);

}catch(Exception e){

e.printStackTrace();

}

}

return conn;

}

private static Statement getStatement(){

if(statement==null){

try{

statement=conn.createStatement();

}catch(Exception e){

e.printStackTrace();

}

}

return statement;

}

public static ResultSet getResultSet(String sql){

ResultSet rs=null;

try{

rs=statement.executeQuery(sql);

}catch(Exception e){

e.printStackTrace();

}

return rs;

}

public static void closeAll(ResultSet rs,Statement st,Connection cn){

try{

if(rs!=null){

rs.close();

}

if(st!=null){

st.close();

}

if(cn!=null){

cn.close();

}

}catch(Exception e){

e.printStackTrace();

}

}

}

创建一个Servlet，TestHttpReportServlet.java 如下：

package com.accord.test;

import java.io.File;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import javax.servlet.ServletContext;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import net.sf.jasperreports.engine.JRDataSource;

import net.sf.jasperreports.engine.JRException;

import net.sf.jasperreports.engine.JRExporterParameter;

import net.sf.jasperreports.engine.JRRuntimeException;

import net.sf.jasperreports.engine.JasperCompileManager;

import net.sf.jasperreports.engine.JasperFillManager;

import net.sf.jasperreports.engine.JasperPrint;

import net.sf.jasperreports.engine.JasperReport;

import net.sf.jasperreports.engine.data.JRMapArrayDataSource;

import net.sf.jasperreports.engine.export.JRHtmlExporter;

import net.sf.jasperreports.engine.export.JRPdfExporter;

import net.sf.jasperreports.engine.export.JRXlsExporter;

import net.sf.jasperreports.engine.export.JRXlsExporterParameter;

import net.sf.jasperreports.engine.util.JRLoader;

import com.accord.dao.Jdbc;

public class TestHttpReportServlet extends HttpServlet {

public static void main(String[] args) {

String path = "http://localhost:8080/JasperReports/TestHttpReportServlet";

String str = path.substring(0, path.lastIndexOf("/"));

System.out.println(str);

}

private static final long serialVersionUID = 1L;

public TestHttpReportServlet() {

super();

}

protected void doGet(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

// System.out.println("1");

doPost(request, response);

}

@SuppressWarnings("deprecation")

protected void doPost(HttpServletRequest request,

HttpServletResponse response) throws ServletException, IOException {

ServletContext context = this.getServletConfig().getServletContext();

try {

//JasperCompileManager.compileReportToFile("E:/report/DbReport.jrxml");

JasperCompileManager.compileReportToFile(context.getRealPath("/reports/DbReport.jrxml"));

} catch (JRException e1) {

e1.printStackTrace();

}//编译jrxml文件，生成jasper文件

File reportFile = new File(context.getRealPath("/reports/DbReport.jasper"));

if (!reportFile.exists())

throw new JRRuntimeException("FileWebappReport.jasper "

+ "not found. The report design must be compiledfirst.");

Map map = new HashMap();

map.put("name", "张三");

try {

File jasperFile = new File(context.getRealPath("/reports/DbReport.jasper"));

JasperReport jasperReport = (JasperReport) JRLoader.loadObject(jasperFile);

JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, map, Jdbc.getConnection());

String fileName = jasperPrint.getName() + ".html";

File destFile = new File(context.getRealPath("/reports"), fileName);

String destFileName = destFile.toString();

//生成html数据

JRHtmlExporter exporter = new JRHtmlExporter();

exporter.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);

exporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME,destFileName);

exporter.setParameter(JRExporterParameter.CHARACTER_ENCODING,"GB2312"); // 关键是此句

exporter.exportReport();

System.out.println(request.getRequestURL());

String path = request.getRequestURL().toString();

String str = path.substring(0, path.lastIndexOf("/"));

response.sendRedirect(str + "/reports/" + fileName);

//生成Excel

/*JRXlsExporter xls = new JRXlsExporter();

xls.setParameter(JRXlsExporterParameter.JASPER_PRINT, jasperPrint);

xls.setParameter(JRXlsExporterParameter.OUTPUT_STREAM, response.getOutputStream());

xls.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET, Boolean.FALSE);

xls.setParameter(JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND, Boolean.FALSE);

response.setHeader("Content-Disposition", "attachement;filename=first.xls");

response.setContentType("application/vnd_ms-excel");

xls.exportReport();*/

//生成pdf

/*JRPdfExporter pdf = new JRPdfExporter();

pdf.setParameter(JRExporterParameter.JASPER_PRINT, jasperPrint);

pdf.setParameter(JRExporterParameter.OUTPUT_STREAM, response.getOutputStream());

response.setHeader("Content-Disposition", "attachement;filename=first.pdf");

response.setContentType("application/pdf");

response.setCharacterEncoding("UTF-8");

pdf.exportReport();*/

} catch (JRException e) {

e.printStackTrace();

}

}

public JRDataSource getReportDataSource() {

JRMapArrayDataSource dataSource = new JRMapArrayDataSource(

getMaparray());

return dataSource;

}

public Map[] getMaparray() {

// map key键必须对应DbReport.jrxml中显示数据字段

Map map1 = new HashMap();

map1.put("id", 1);

map1.put("name", "aaa");

map1.put("age", "20");

Map map2 = new HashMap();

map2.put("id", 2);

map2.put("name", "bbb");

map2.put("age", "28");

Map map3 = new HashMap();

map3.put("id", 3);

map3.put("name", "ccc");

map3.put("age", "30");

Map[] mapArray = new Map[3];

mapArray[0] = map1;

mapArray[1] = map2;

mapArray[2] = map3;

return mapArray;

}

}

web.xml 如下：

Archetype Created Web Application

TestHttpReportServlet

TestHttpReportServlet

com.accord.test.TestHttpReportServlet

TestHttpReportServlet

/TestHttpReportServlet

打开浏览器，访问链接地址：http://localhost:8080/JasperReports/TestHttpReportServlet

TestHttpReport.java 如下：

package com.accord.test;

import java.io.File;

import java.io.IOException;

import java.util.HashMap;

import java.util.Map;

import javax.servlet.ServletContext;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import net.sf.jasperreports.engine.JRDataSource;

import net.sf.jasperreports.engine.JRException;

import net.sf.jasperreports.engine.JasperCompileManager;

import net.sf.jasperreports.engine.JasperFillManager;

import net.sf.jasperreports.engine.JasperPrint;

import net.sf.jasperreports.engine.JasperReport;

import net.sf.jasperreports.engine.JasperRunManager;

import net.sf.jasperreports.engine.data.JRMapArrayDataSource;

import net.sf.jasperreports.engine.export.JRXlsExporter;

import net.sf.jasperreports.engine.export.JRXlsExporterParameter;

import net.sf.jasperreports.engine.util.JRLoader;

import com.accord.dao.Jdbc;

@SuppressWarnings("serial")

public class TestHttpReport extends HttpServlet {

public void service(HttpServletRequest request,

HttpServletResponse response) {

try {

ServletContext context = this.getServletConfig().getServletContext();

//JasperCompileManager 编译管理器

//JasperFillManager 填充管理器

//JRXmlLoader xml加载器

//JasperPrintManager 打印管理器

//JasperExportManager 导出管理器

//JasperRunManager 运行管理器

//编译jrxml文件，生成jasper文件

JasperCompileManager.compileReportToFile(context.getRealPath("/reports/DbReport.jrxml"));

Map map = new HashMap();

map.put("name", "张三");

File jasperFile = new File(context.getRealPath("/reports/DbReport.jasper"));

JasperReport jasperReport = (JasperReport) JRLoader.loadObject(jasperFile);

JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, map, Jdbc.getConnection());

//以map数组位数据源，生成html文件

JasperRunManager.runReportToHtmlFile(context.getRealPath("/reports/DbReport.jasper"), "E:/report/test2.html", map, getReportDataSource());

try {

//生成excel

JRXlsExporter xls = new JRXlsExporter();

xls.setParameter(JRXlsExporterParameter.JASPER_PRINT, jasperPrint);

xls.setParameter(JRXlsExporterParameter.OUTPUT_STREAM, response.getOutputStream());

xls.setParameter(JRXlsExporterParameter.IS_ONE_PAGE_PER_SHEET, Boolean.FALSE);

xls.setParameter(JRXlsExporterParameter.IS_WHITE_PAGE_BACKGROUND, Boolean.FALSE);

response.setHeader("Content-Disposition", "attachment;filename=first.xls");

response.setContentType("application/vnd_ms-excel");

xls.exportReport();

} catch (IOException e) {

e.printStackTrace();

}

} catch (JRException e) {

e.printStackTrace();

}

}

public JRDataSource getReportDataSource() {

JRMapArrayDataSource dataSource = new JRMapArrayDataSource(getMaparray());

return dataSource;

}

public Map[] getMaparray() {

//map key键必须对应DbReport.jrxml中显示数据字段

Map map1=new HashMap();

map1.put("id", 1);

map1.put("name", "aaa");

map1.put("age", "20");

Map map2=new HashMap();

map2.put("id", 2);

map2.put("name", "bbb");

map2.put("age", "28");

Map map3=new HashMap();

map3.put("id", 3);

map3.put("name", "ccc");

map3.put("age", "30");

Map[] mapArray=new Map[3];

mapArray[0]=map1;

mapArray[1]=map2;

mapArray[2]=map3;

return mapArray;

}

}

TestJrxmlToJasper.java 如下：

package com.accord.test;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream;

import net.sf.jasperreports.engine.JRException;

import net.sf.jasperreports.engine.JasperCompileManager;

public class TestJrxmlToJasper {

public static void main(String[] args) throws Exception {

String path = "E:/report/DbReport.jrxml";

File file = new File(path);

String parentPath = file.getParent();

String jrxmlDestSourcePath = "E:/report/DbReport.jasper";

JasperCompileManager.compileReportToFile(path,

jrxmlDestSourcePath);

InputStream isRef = new FileInputStream(new File(jrxmlDestSourcePath));

/*ServletOutputStream sosRef = response.getOutputStream();

response.setContentType("application/pdf");

JasperRunManager.runReportToPdfStream(isRef,sosRef,new HashMap(),

new JREmptyDataSource());

sosRef.flush();

sosRef.close();*/

}

}

TestReport.java 如下：

package com.accord.test;

import java.io.File;

import java.util.HashMap;

import java.util.Map;

import com.accord.dao.Jdbc;

import net.sf.jasperreports.engine.JRExporterParameter;

import net.sf.jasperreports.engine.JasperCompileManager;

import net.sf.jasperreports.engine.JasperFillManager;

import net.sf.jasperreports.engine.JasperPrint;

import net.sf.jasperreports.engine.JasperReport;

import net.sf.jasperreports.engine.export.JRHtmlExporter;

import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;

import net.sf.jasperreports.engine.export.JRXlsExporter;

import net.sf.jasperreports.engine.export.JRXlsExporterParameter;

import net.sf.jasperreports.engine.export.JRXmlExporterParameter;

import net.sf.jasperreports.engine.util.JRLoader;

public class TestReport {

public static void main(String[] args) {

service();

}

//protected void service(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {\

public static void service(){

try{

//ServletContext context = this.getServletConfig().getServletContext();

//JasperCompileManager 编译管理器

//JasperFillManager 填充管理器

//JRXmlLoader xml加载器

//JasperPrintManager 打印管理器

//JasperExportManager 导出管理器

JasperCompileManager.compileReportToFile("E:/report/DbReport.jrxml");//编译jrxml文件，生成jasper文件

Map map=new HashMap();//参数map

map.put("name", "张三");

//生成jrprint文件

//JasperFillManager.fillReportToFile(context.getRealPath("/reports/DbReport.jasper"), map, JDBC.conn);

File jasperFile=new File("E:/report/DbReport.jasper");

JasperReport jasperReport =(JasperReport)JRLoader.loadObject(jasperFile);

JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, map,Jdbc.getConnection());

File file=new File("E:/report/DbReport.html");

//生成html 测试成功

/*JRHtmlExporter html = new JRHtmlExporter();

html.setParameter(JRHtmlExporterParameter.JASPER_PRINT, jasperPrint);

html.setParameter(JRHtmlExporterParameter.OUTPUT_FILE_NAME,"E:/report/DbReport.html");//生成文件

//html.setParameter(JRHtmlExporterParameter.OUTPUT_WRITER,response.getWriter()); // web页面显示

html.setParameter(JRHtmlExporterParameter.IS_USING_IMAGES_TO_ALIGN,Boolean.FALSE);

html.setParameter(JRExporterParameter.CHARACTER_ENCODING, "utf-8");

html.exportReport();*/

//生成excel

/*JRXlsExporter xls=new JRXlsExporter();

xls.setParameter(JRXlsExporterParameter.JASPER_PRINT, jasperPrint);

xls.setParameter(JRXlsExporterParameter.OUTPUT_STREAM, respon);

xls.exportReport();*/

//生成pdf

/*

JRPdfExporter pdf = new JRPdfExporter();

*/

}catch(Exception e){

e.printStackTrace();

}

}

}

注：JasperReport 生成的Pdf文件，中文不显示，这个没有解决，路过的大神指点一下！  992544491@qq.com

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