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发表时间：2007-11-07
最近看了《JasperReports for Java Developers》，里面讲了怎么在Spring里使用JasperReport
照着里面的例子做了一下，例子是没有问题的，但是我把展现方式改为由JasperReportsHtmlView 展现就出问题了，所有的图片都出不来，是不是使用JasperReportsHtmlView还要配置其它的拦截器或是什么？我在Google里找了一通，也没能解决主要是E文不太好国外的论坛也找了，看得头大，所以把代码贴出来，那位用过的能指点一下，谢过了 web配置文件 <?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>ReportWebApp</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>jasperSpring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>jasperSpring</servlet-name>
<url-pattern>/jasperSpring/*</url-pattern>
</servlet-mapping>
</web-app>
前台Jsp页面： <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Generate Report</title> </head> <body> Click on the button to generate the report. <form name="reportForm" action="jasperSpring/report" method="get"><input type="submit" name="submitButton" value="Submit" /></form> </body> </html> jasperSpring-servlet.xml的内容： <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd"> <beans> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" destroy-method="close"> <property name="driverClassName"> <value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value> </property> <property name="url"> <value>jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=Northwind</value> </property> <property name="username"> <value>sa</value> </property> <property name="password"> <value>sa</value> </property> </bean> <bean id="publicUrlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="mappings"> <props> <prop key="report">jasperController</prop> </props> </property> </bean> <bean id="jasperController" class="net.aachina.jasperreport.JasperSpringController"> <property name="dataSource"> <ref local="dataSource" /> </property> </bean> <bean id="viewResolver" class="org.springframework.web.servlet.view.ResourceBundleViewResolver"> <property name="basename" value="views" /> </bean> <bean id="ImageServlet" class="net.sf.jasperreports.j2ee.servlets.ImageServlet"> </bean> </beans> 引用 views.properties中的内容
report.class=org.springframework.web.servlet.view.jasperreports.JasperReportsPdfView #report.class=org.springframework.web.servlet.view.jasperreports.JasperReportsHtmlView #report.class=net.aachina.jasperreport.render.JasperReportsHtmlView report.url=reports/ChartReportDemo.jasper 控制器JasperSpringController的源码：
package net.aachina.jasperreport;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
import net.sf.jasperreports.engine.JRResultSetDataSource;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class JasperSpringController implements Controller {
private DataSource dataSource;
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, ClassNotFoundException, SQLException
{
return new ModelAndView("report", getModel());
}
@SuppressWarnings("unchecked")
private Map getModel() throws ClassNotFoundException, SQLException
{
Connection connection;
Statement statement;
ResultSet resultSet;
HashMap model = new HashMap();
String query = "SELECT"+
" Employees.[LastName] AS Employees_LastName,"+
" Employees.[FirstName] AS Employees_FirstName,"+
" Employees.[EmployeeID] AS Employees_EmployeeID,"+
" Orders.[OrderID] AS Orders_OrderID,"+
" Orders.[OrderDate] AS Orders_OrderDate "+
" FROM "+
" Employees INNER JOIN Orders ON Employees.[EmployeeID] = Orders.[EmployeeID]";
connection = dataSource.getConnection();
statement = connection.createStatement();
resultSet = statement.executeQuery(query);
JRResultSetDataSource resultSetDataSource =new JRResultSetDataSource(resultSet);
model.put("datasource", resultSetDataSource);
return model;
}
public void setDataSource(DataSource dataSource)
{
this.dataSource = dataSource;
}
}
JasperReport页面在IReport中的效果： 页面输出PDF效果： 但把输出改为JasperReportsHtmlView页面上的所有图片都显示不出来，应该是还有什么属性值设置的不对，哪位知道的请指点一下，项目里面的Jar包太大了不然把整个项目都上传上来 声明：ITeye文章版权属于作者，受法律保护。没有作者书面许可不得转载。
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发表时间：2007-11-07
直接使用Servlet 可以正确的输出为HTML，代码为：
package net.aachina.jasperreport;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.HashMap;
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.JRExporterParameter;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.export.JRHtmlExporter;
import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;
import net.sf.jasperreports.j2ee.servlets.ImageServlet;
public class HtmlReportServlet extends HttpServlet {
public static final String REPORT_DIRECTORY = "/reports";
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
Connection connection;
ServletContext context = this.getServletConfig().getServletContext();
String reportName = "ChartReportDemo";
PrintWriter printWriter = response.getWriter();
InputStream reportStream = getServletConfig().getServletContext()
.getResourceAsStream(
"/" + REPORT_DIRECTORY + "/" + reportName + ".jasper");
JasperPrint jasperPrint;
try {
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
connection = DriverManager
.getConnection("jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=Northwind","sa","sa");
jasperPrint = JasperFillManager.fillReport(reportStream,
new HashMap(), connection);
JRHtmlExporter htmlExporter = new JRHtmlExporter();
response.setContentType("text/html");
request.getSession().setAttribute(
ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE,
jasperPrint);
htmlExporter.setParameter(JRExporterParameter.JASPER_PRINT,
jasperPrint);
htmlExporter.setParameter(JRExporterParameter.OUTPUT_WRITER,
printWriter);
htmlExporter.setParameter(JRHtmlExporterParameter.CHARACTER_ENCODING, "gb2312");
htmlExporter.setParameter(JRHtmlExporterParameter.IMAGES_URI,
"image?image=");
htmlExporter.exportReport();
connection.close();
System.out.println("done!");
} catch (Throwable t) {
// display stack trace in the browser
t.printStackTrace(printWriter);
}
}
}
web.xml修改为： <?xml version="1.0" encoding="UTF-8"?> <web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <display-name> ReportWebApp</display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>jasperSpring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet> <servlet-name>ImageServlet</servlet-name> <servlet-class>net.sf.jasperreports.j2ee.servlets.ImageServlet</servlet-class> </servlet> <servlet> <servlet-name>HtmlReportServlet</servlet-name> <servlet-class> net.aachina.jasperreport.HtmlReportServlet </servlet-class> </servlet> <servlet-mapping> <servlet-name>jasperSpring</servlet-name> <url-pattern>/jasperSpring/*</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>HtmlReportServlet</servlet-name> <url-pattern>/htmlReport</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>ImageServlet</servlet-name> <url-pattern>/image</url-pattern> </servlet-mapping> </web-app> index.jsp的form action修改为：htmlReport 输出效果：图片上传不知道怎么编辑^_^ |
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发表时间：2007-11-07
终于解决了！
方法来源于：http://forum.springframework.org/showthread.php?t=25030 其实自己也应该想到的BS一下自己。为了不让后来人受累，我把代码再Copy过来使帖子完整^_^
package net.aachina.jasperreport.render;
import java.io.ByteArrayOutputStream;
import java.util.Map;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.ui.jasperreports.JasperReportsUtils;
import org.springframework.util.CollectionUtils;
import org.springframework.web.servlet.view.jasperreports.AbstractJasperReportsSingleFormatView;
import org.springframework.web.util.WebUtils;
import net.sf.jasperreports.engine.JRExporter;
import net.sf.jasperreports.engine.JRExporterParameter;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.export.JRHtmlExporter;
import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;
import net.sf.jasperreports.j2ee.servlets.ImageServlet;
public class JasperReportsHtmlViewExtend extends
AbstractJasperReportsSingleFormatView {
private static final int OUTPUT_BYTE_ARRAY_INITIAL_SIZE = 4096;
public JasperReportsHtmlViewExtend() {
setContentType("text/html; charset=UTF-8");
}
protected JRExporter createExporter() {
JRHtmlExporter jrHtmlExporter = new JRHtmlExporter();
jrHtmlExporter.setParameter(JRHtmlExporterParameter.IMAGES_URI,
"image?image=");
return jrHtmlExporter;
}
protected boolean useWriter() {
return true;
}
@Override
protected void renderReport(JasperPrint populatedReport, Map model,
HttpServletResponse response) throws Exception {
// TODO 自动生成方法存根
if (model.containsKey("requestObject")) {
HttpServletRequest request = (HttpServletRequest) model
.get("requestObject");
request.getSession().setAttribute(
ImageServlet.DEFAULT_JASPER_PRINT_SESSION_ATTRIBUTE,
populatedReport);
}
// Prepare report for rendering.
JRExporter exporter = createExporter();
// Set exporter parameters - overriding with values from the Model.
Map mergedExporterParameters = mergeExporterParameters(model);
if (!CollectionUtils.isEmpty(mergedExporterParameters)) {
exporter.setParameters(mergedExporterParameters);
}
if (useWriter()) {
// We need to write text to the response Writer.
// Copy the encoding configured for the report into the response.
String contentType = getContentType();
String encoding = (String) exporter
.getParameter(JRExporterParameter.CHARACTER_ENCODING);
if (encoding != null) {
// Only apply encoding if content type is specified but does not
// contain charset clause already.
if (contentType != null
&& contentType.toLowerCase().indexOf(
WebUtils.CONTENT_TYPE_CHARSET_PREFIX) == -1) {
contentType = contentType
+ WebUtils.CONTENT_TYPE_CHARSET_PREFIX + encoding;
}
}
response.setContentType(contentType);
// Render report into HttpServletResponse's Writer.
JasperReportsUtils.render(exporter, populatedReport, response
.getWriter());
}
else {
// We need to write binary output to the response OutputStream.
// Apply the content type as specified - we don't need an encoding
// here.
response.setContentType(getContentType());
// Render report into local OutputStream.
// IE workaround: write into byte array first.
ByteArrayOutputStream baos = new ByteArrayOutputStream(
OUTPUT_BYTE_ARRAY_INITIAL_SIZE);
JasperReportsUtils.render(exporter, populatedReport, baos);
// Write content length (determined via byte array).
response.setContentLength(baos.size());
// Flush byte array to servlet output stream.
ServletOutputStream out = response.getOutputStream();
baos.writeTo(out);
out.flush();
}
}
}
看代码就应该能明白了，哎 为什么我就没想到这么写呢 对了控制器里面也要修改一下： package net.aachina.jasperreport;
import java.io.IOException;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.sql.DataSource;
import net.sf.jasperreports.engine.JRResultSetDataSource;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
public class JasperSpringController implements Controller {
private DataSource dataSource;
public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException, ClassNotFoundException, SQLException
{
return new ModelAndView("report", getModel(request));
}
@SuppressWarnings("unchecked")
private Map getModel(HttpServletRequest request) throws ClassNotFoundException, SQLException
{
Connection connection;
Statement statement;
ResultSet resultSet;
HashMap model = new HashMap();
String query = "SELECT"+
" Employees.[LastName] AS Employees_LastName,"+
" Employees.[FirstName] AS Employees_FirstName,"+
" Employees.[EmployeeID] AS Employees_EmployeeID,"+
" Orders.[OrderID] AS Orders_OrderID,"+
" Orders.[OrderDate] AS Orders_OrderDate "+
" FROM "+
" Employees INNER JOIN Orders ON Employees.[EmployeeID] = Orders.[EmployeeID]";
connection = dataSource.getConnection();
statement = connection.createStatement();
resultSet = statement.executeQuery(query);
JRResultSetDataSource resultSetDataSource =new JRResultSetDataSource(resultSet);
model.put("datasource", resultSetDataSource);
model.put("requestObject",request);
System.out.println("well done!");
return model;
}
public void setDataSource(DataSource dataSource)
{
this.dataSource = dataSource;
}
}
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发表时间：2007-11-12
在上面的Controller中传入的是JRResultSetDataSource 如何传入Connection？因为报表文件里已经存在SQL语句了，如何直接传入Connection呢？这样最少页面看上去要整齐一点
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发表时间：2007-12-12
这样做，connection何时关闭？
以下做法供参考：将datasource（jdbc）作为一个value放入model，这样spring的jasper相关view就会取到这个datasource，进而获取connection，fillreport后由spring关闭connection。 请参考代码AbstractJasperReportsView.fillReport JRDataSource jrDataSource = getReportData(model);
if (jrDataSource != null) {
// Use the JasperReports JRDataSource.
if (logger.isDebugEnabled()) {
logger.debug("Filling report with JRDataSource [" + jrDataSource + "].");
}
return JasperFillManager.fillReport(this.report, model, jrDataSource);
}
else {
if (this.jdbcDataSource == null) {
this.jdbcDataSource = (DataSource) CollectionUtils.findValueOfType(model.values(), DataSource.class);
}
if (this.jdbcDataSource != null) {
// Use the JDBC DataSource.
if (logger.isDebugEnabled()) {
logger.debug("Filling report with JDBC DataSource [" + this.jdbcDataSource + "].");
}
Connection con = this.jdbcDataSource.getConnection();
try {
return JasperFillManager.fillReport(this.report, model, con);
}
finally {
try {
con.close();
}
catch (SQLException ex) {
logger.debug("Could not close JDBC Connection", ex);
}
}
}
else {
// Assume that the model contains parameters that identify
// the source for report data (e.g. Hibernate or JPA queries).
return JasperFillManager.fillReport(this.report, model);
}
}
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发表时间：2008-08-05
没有上传这个文件吗???ChartReportDemo.jasper
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