Jasper report subreport datasource example

Jasper report subreport datasource example

Hi Thomas, I'm not in the field of reporting any more.

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Please don't take it the wrong way but I think Jasper Reports is a waste of time compared to a much better free alternative available, mainly BIRT I have full experience with both of the frameworks. How do u fix the frame size in xls.

Can u plz explain. M also facing the same problem. How to freeze the panel in excel generated. I'm sorry guys, I wish I had the answers for you. I simply don't work with that framework any more, I'll try to find some time to check this issue in the mean time perhaps some one from the community will see this question. If you don't work in Jasper anymore, and in fact have a very negative opinion of it, then kindly remove your tutorial so that others may actually find something useful to answer their questions, rather than a half-complete tutorial.

Everything Code. Tuesday, December 15, Jasper Reports - Subreport usage demonstration. This post is part of Jasper Reports demo documentation projectplease read that post for information on downloading the discussed demo files jasperreports Optional feature for subreport is return parameters which allow passing information from calculations done within the subreport back to the master report, under the hood these are variables which are defined in the master report and passed to the subreport element we will see an example of this later in the post.

Lets start with the basics setup required to get the report demo running: First you will need to start the hsqldb database.

jasper report subreport datasource example

Next open all 3 reports in iReports. Make sure you have focus on the MasterReport tab Now click "Preview" In the popup windows select "Use Default" This should bring a semi-working report that looks something like this:. The report is fully operation. Lets start analyzing. Labels: demoguidejasper-reports. Anonymous March 12, at PM.

Maxim Veksler March 12, at PM. Anonymous March 22, at PM. Anonymous March 23, at PM. Maxim Veksler March 31, at PM. Anonymous September 9, at AM. Newer Post Older Post Home.

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Subscribe to: Post Comments Atom. Subscribe To Posts Atom. Comments Atom. I do 5 nines system development with some system administration.Documented by Sanda Zaharia. How to fill reports using data source objects. Data Sources Data sources are structured data containers used when filling generated reports.

Compiled JasperReport objects are now prepared to encapsulate their dynamic part of data within the generated report template. The filling process relies on expression evaluations, variable calculations and successive iterations through the records of the supplied data source object. Every report section is filled step-by-step.

Usually, data are loaded into data source objects. The engine expects to receive either a JRDataSource object as the data source of the report that it has to fill, or a java. Connection when the report data is found in a relational database.

Calling Jasper Report from Java Application

The JRDataSource interface is very simple. Only two methods should implemented here: public boolean next throws JRException; - called on the data source object by the reporting engine when iterating through the data at report-filling time public Object getFieldValue JRField jrField throws JRException; - provides the value for each report field in the current data source record It is important to notice that the only way to retrieve data from the data source is by using the report fields.

As a structured object, a data source object is more like a table with columns and rows containing data in the table cells. The rows of this table are the records through which the reporting engine iterates when filling the report and each column should be mapped to a report field, so that we can make use of the data source content in the report expressions.

There are several default implementations of the JRDataSource interface, depending on the way the records in the data source are acquired. It adds only one method, called moveFirstto the interface. All built-in data source implementations listed below are rewindable except for the JRResultSetDataSourcewhich does not support moving the record pointer back.

This is a problem only if this data source is used to manually wrap a java. ResultSet before passing it to the subreport. It is not a problem if the SQL query resides in the subreport template because the engine will reexecute it when restarting the subreport on the next page.

ResultSet object. Represents the most commonly used data source implementations when report data are extracted from a relational database. If a java. Connection is passed to the engine instead, it executes first the related query and stores the returned java.

Each object inside the array or the collection is considered a record in this type of data source. The mapping between a particular JavaBean property and the corresponding report field is made by naming conventions. The name of the report field must be the same as the name of the JavaBean property as specified by the JavaBean specifications. Map objects. Each Map object in the wrapped array or collection is considered a virtual record in the data source, and the value of each report field is extracted from the map using the report field name as the key TableModel data sources: the JRTableModelDataSource class - Wraps a javax.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. How can I do this? Can I copy this data source and pass it? Note: Using the same with master report datasource in subreport can cause the effect of loosing the first row in the subreport.

You can read Why is the first record missing from my subreport?

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Yes, you need to be careful about how to pass a data source. Then the subreport has its own SQL query. In your case you want to pass the actual data. It's on a different tab in that same window where you set the subreport connection in iReport. Often this is sufficient to pass the data source. But you might need a little code to handle things. Consider this example with a CSV data source re-used in subreports.

The reason why you can't just use the JRParameter. We solved this with a minimal helper class:. If you use ResultSet as the parameter, maybe loss one record as you definition the subreport in detail bands.

It's an old question already answered but i get to pass the undelying bean to the subreport, avoiding the loss of the first record or passing all the records to subreport. This solution has the advantage that the subreport can be used as main report and is "simply" pass the actual record as subreport datasource using groovy as report lang :.

I had a situation where I had a table in a subreport. The subreport only has a title band and a summary band, with the table in the summary. I wanted to use the subreport datasource for the table as well, but could not get either of the approaches in the accepted answer to work.Datasources are structured data container.

Adding a Second Query to a Jasper Report

While generating the report, JasperReports engine obtains data from the datasources. Data can be obtained from the databases, XML files, arrays of objects, and collection of objects. We saw in the chapter Filling Reportsthe fillReportXXX method expects to receive a data source of the report, which has to fill, in the form of net.

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JRDataSource object or a java. Connection when the report data is found in a relational database. At the report filling time, this method is called on the data source object by the reporting engine when iterating through the data. The only way to retrieve data from the data source is by using the report fields. There are several default implementations of the JRDataSource interface, depending on the way, the records in the data source are acquired.

ResultSet object. This is the most commonly used data source implementations when report data are extracted from a relational database.

If a java. Connection is passed to the engine instead, it executes first the related query and stores the returned java. Each object inside the array or the collection will be seen as one record in this type of data source. The mapping between a particular JavaBean property and the corresponding report field is made by naming conventions.

The name of the report field must be the same as the name of the JavaBean property as specified by the JavaBeans specifications. Map objects. Each Map object in the wrapped array or collection is considered a virtual record in the data source, and the value of each report field is extracted from the map using the report field named as the key. In many client-side applications, data is displayed in tabular format. A common requirement in many applications is to allow the user to print this tabular format as a report.

This class wraps a javax. TableModel object. Columns in the wrapped TableModel object can be accessed either by their names or by their 0-based indexes. Records in the XML data source are represented by node elements selected through the XPath expression.

XPath is a language used to navigate through an XML document's attributes and elements. Field values are retrieved using their column index. JRXlsDataSource represents an implementation for data sources, which retrieve their data from Excel documents.

Report-field mapping for this data source implementation is also based on the field column index. The class JREmptyDataSourcesimulates a data source with a given number of virtual empty records inside.

It is used by the UI tools to offer basic report preview functionality, or in special report templates, or for testing and debugging purposes.What is a Report? A report is a nicely formatted way of presenting the data that you have entered. Reports are all about querying a database and displaying the results in a nice format. What is Jasper Report? Jasper Reports-the heart of iReport is a content-rendering library, not a standalone application. It cannot run on its own and must be embedded in another client- or server-side Java application.

The library is written entirely in Java and can be used in a variety of Java-enabled applications, including J2EE or Web applications, to generate dynamic content. Its main purpose is to help to create page-oriented, ready-to-print documents in a simple and flexible manner. What is iReport? You can use iReport in two different ways- a.

Standalone installation b. Using Plugins. If you want to use standalone installation you need to download iReport-Designer for Jasper Reports from here. The latest version of Jasper Reports is currently iReport You can also try with any previous version. If you want to use plugins for NetBeans then download from here. Current iReport NetBeans plugin version is 4.

I assume that you hava a previous knowledge on how to design a report in iReport. First we need to design a report using iReport which is beyond of this topics. Note that I have already created the report with iReport 4. Note: Those above jar files are version specific i. In fact, I am always trying my best to provide you complete working example in every topics. Your like, share and comment are so much appreciated.

I am Md. I am a self learner and passionate about training and writing. I am always trying my best to share my knowledge through my blog. More Posts - Website.

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Follow Me:.Hello all, I am trying to build a report from my java application that uses subreport. But I can see the field value if I set it in the master report. Maybe I am missing something along the way or setting the datasource in a wrong way? Any help is appreciated : Using iReport 3. Have you taken care of mapping master report parameters mapping with sub report parameters.

The mapping is a must to pass values from master to sub-report. Hope this info info helps you? With this I can access all parameters from the master report in the subreport, no problems in there. Now what I need to do, is to get the same datasource from the master report in the subreport. Connection Expression: java. I am using a java bean describing the fields I need to show in the subreport.

Then I created a JRBeanDataSourceCollection with this bean called dataSourceand then added the datasource to the report as a parameter, as in the following code:.

Those fields in the java bean are the ones I need to read in the subreport, and therefore why I am trying to add the mydatasource parameter as a datasource to the subreport. In the end I created an arraylist with just one element, the bean I wanted as a datasource for my subreport, like this:. Then I added a parameter to my master report called "formData" of the exact same type as a datasource parameter. The problem I was having was because I was trying to do code above in a separate method, and for some wierd reason it didn't work.

Multiple Subreports in Main Report using same datasource

So I just left all in the same method that create the other parameters, and it did the trick. I have been wondering How iReport takes care of subreport I faced all above problem doing subreport in iReport.

In Main Report. I am trying to use multiple 2 subreports in one master report. In subreport1 I am showing some database results and from subreport2 i want to display 3 columns of data called formula, status, result. I am using empty datasource for the subreport3.

Now, my question is, "can we pass objects to the reports from subreports?

Create SubReports

I would like to know, can we pass objects via any mechanism? Can we store any mechanism which can store objects those eventually consist of different parameters? Will it be useful for me?Generally speaking, creating a subreport is very similar to creating any other report. The margins of a subreport are usually set to zero for subreports because a subreport is meant to be a portion of a page, not an entire document. The horizontal dimension of the subreport should be as large as the element into which it is placed in the parent report.

You add a subreport to a report by dragging the Subreport element from the palette. At design time the element is rendered as a rectangle with the dimensions specified in the subreport. The Subreport element does not need to be the same size as the subreport.

You can think of the Subreport element as a place holder defining the position of the top-left corner to which the subreport is aligned. However, we recommend that you set the dimensions of the Subreport element to the dimensions of the subreport to best visualize the layout of the final report.

When a subreport element is selected in the master report, the following properties are available on the Subreport tab of the Properties view:. Required Expression that can be used to load the Jasper object to use when filling the subreport portion of the document.

Evaluated at run time to retrieve the Jasper object for the subreport. See The Expression Property for more information. Specifies whether the subreport's report object is kept in memory or reloaded each time it's used.

jasper report subreport datasource example

It is common for a subreport element to be printed more than once or once for each record in the main dataset. The cache works only if the subreport expression type is Stringbecause that string is used as key for the cache. Only one of these expression types can be used. If there is no connection or data source expression, no data is passed to the subreport. This option is useful at times.

Optional expression used to produce a java. Map object at run time. Allows you to define how to store values in local variables calculated or processed in the subreport such as totals and record count. The subreport expression specifies the location of the Jasper file used to generate the subreport. If the expression is a string java. StringJasperReports assumes that the subreport must be loaded from a Jasper file and tries to locate the file in the same way that resources are located, as follows:.

This means that using an expression of type String means you are in some way trying to specify a file path. Optionally, you can put your Jasper file in the classpath and refer to it as a resource, using an expression something like "subreport. This makes perfect sense, considering that a Jasper object is not necessarily loaded from a physical file. To simplify report design when loading a subreport from the file system, do one of the following:.

For JasperReports to retrieve data and fill the subreport, you have to set the subreport data source.

jasper report subreport datasource example

The following options are available:. JDBC connections make using subreports simple enough. A connection expression must identify a java. Connection object ready to be used, so a connection to the database is already opened. It must be clear that if we pass a JDBC connection to the subreport, it is because we defined an SQL query in the subreport, a query that will be used to fill it.

Understanding Subreports

Using a different data source is sometimes necessary when a connection like JDBC is not being used; it is more complicated but extremely powerful. It requires writing a data source expression that returns a JRDataSource instance that you then use to fill the subreport. Depending on what you want to achieve, you can pass the data source that will feed the subreport through a parameter, or you can define the data source dynamically every time it is required.

Therefore, the parameter technique is not suitable when every record of the master report has its own subreport unless there is only one record in the master report. When we discuss data sources this will be more clear and you will see how this problem is easily solved with custom data sources.


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