放在一起
这是从前面的片段汇编而来的工作源文件。不要忘记将freemarker.jar放入CLASSPATH。
import freemarker.template.*;
import java.util.*;
import java.io.*;
public class Test {
public static void main(String[] args) throws Exception {
/* ------------------------------------------------------------------------ */
/* You should do this ONLY ONCE in the whole application life-cycle: */
/* Create and adjust the configuration singleton */
Configuration cfg = new Configuration(Configuration.VERSION_2_3_29);
cfg.setDirectoryForTemplateLoading(new File("/where/you/store/templates"));
// Recommended settings for new projects:
cfg.setDefaultEncoding("UTF-8");
cfg.setTemplateExceptionHandler(TemplateExceptionHandler.RETHROW_HANDLER);
cfg.setLogTemplateExceptions(false);
cfg.setWrapUncheckedExceptions(true);
cfg.setFallbackOnNullLoopVariable(false);
/* ------------------------------------------------------------------------ */
/* You usually do these for MULTIPLE TIMES in the application life-cycle: */
/* Create a data-model */
Map root = new HashMap();
root.put("user", "Big Joe");
Product latest = new Product();
latest.setUrl("products/greenmouse.html");
latest.setName("green mouse");
root.put("latestProduct", latest);
/* Get the template (uses cache internally) */
Template temp = cfg.getTemplate("test.ftlh");
/* Merge data-model with template */
Writer out = new OutputStreamWriter(System.out);
temp.process(root, out);
// Note: Depending on what `out` is, you may need to call `out.close()`.
// This is usually the case for file output, but not for servlet output.
}
}
Note:
为了简单起见，我取消了 exception。不要在实际产品中这样做。
为了完整起见，下面是数据模型中使用的 Product 类：
/**
* Product bean; note that it must be a public class!
*/
public class Product {
private String url;
private String name;
// As per the JavaBeans spec., this defines the "url" bean property
// It must be public!
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
// As per the JavaBean spec., this defines the "name" bean property
// It must be public!
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
和模板：
<html>
<head>
<title>Welcome!</title>
</head>
<body>
<h1>Welcome ${user}!</h1>
<p>Our latest product:
<a href="${latestProduct.url}">${latestProduct.name}</a>!
</body>
</html>