Freemarker simple demo

The first step, import dependence

<dependency>
        <groupId>org.freemarker</groupId>
        <artifactId>freemarker</artifactId>
        <version>2.3.23</version>
</dependency>

Next, create a file named ftl expand the template

Four elements in the template file

  1, the text, the direct output section
  2, comments, i.e., <# --...--> not output format
  3, interpolation (Interpolation): $ {..} That portion will be used in partial replacement data model output
  4, FTL instructions: FreeMarker similar instructions, and HTML tags, plus # be distinguished former name, not output.

We will now create a simple template to create a file test.ftl

< HTML > 
< head > 
    < Meta charset = "UTF-8" > 
    < title > Freemarker entry of small DEMO </ title > 
</ head > 
< body > 
< # - I'm just a comment, I do not have any output - - > 
$ {name}, hello. Message {} $ 
</ body > 
</ HTML >

Here is the text, interpolation and comments

The third step is to generate a file

Steps for usage:

Step 1: Create a Configuration object, a new direct object. Freemarker argument constructor is the version number.

Step two: set the path template file is located.

The third step: character set template files. General is utf-8.

Step four: Load a template, create a template object.

Step 5: Create a data set to use a template, which can be pojo can also be a map. Usually Map.

Step Six: Create a Writer object, generally create a FileWriter object, specify the file name generation.

Step Seven: call the process method template object output file.

Eighth step: Close stream

Code:

Create a Test class main method is as follows:

// Create the configuration class 1 
the Configuration the Configuration = new new the Configuration (Configuration.getVersion ()); 
// 2 where the template directory is set. 
Configuration.setDirectoryForTemplateLoading (new new File ( "D: / demo_work / freemarkerDemo / src / main / Resources / ")); 
// 3 character set. 
configuration.setDefaultEncoding (" UTF-8 "); 
. 4 // load template 
template template = configuration.getTemplate (" test.ftl "); 
. // 5 to create a data model 
Map = new new HashMap the Map (); 
map.put ( "name", "Joe Smith"); 
map.put ( "the Message", "Welcome Freemarker!"); 
. 6 // create objects Writer 
Writer out = new FileWriter ( File new new ( "D: \\ the test.html")); 
// output. 7. 
template.process (Map, OUT); 
// close. 8 Writer object. 
the out.close ();

After the execution, the D root directory to see test.html generated.