freemarker自定义标签的写法和应用
添加时间:2013-5-25 点击量:
起首是freemarker的jar包:地址
写标签类(须要持续TemplateDirectiveModel接口重写execute办法)
package freemarker;
import java.io.IOException;
import java.io.Writer;
import java.util.Map;
import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateNumberModel;
public class LabelDirective implements TemplateDirectiveModel {
@Override
public void execute(Environment env, Map params, TemplateModel[] loopVars,
TemplateDirectiveBody body) throws TemplateException, IOException {
Writer out = env.getOut();
//将模版里的数字参数转化成int类型的办法,,其它类型的转换请看freemarker文档
TemplateModel paramValue = (TemplateModel) params.get(num);
int num = ((TemplateNumberModel) paramValue).getAsNumber().intValue();
out.write(Akishimo num= + params.get(num)+的类型为:+paramValue.getClass());
if (body != null) {
body.render(env.getOut());
}else{
throw new RuntimeException(标签内部至少要加一个空格);
}
}
}
写设备和测试的类:
1 package freemarker;
2
3 import java.io.BufferedWriter;
4 import java.io.File;
5 import java.io.FileOutputStream;
6 import java.io.OutputStreamWriter;
7 import java.io.Writer;
8 import java.util.HashMap;
9 import java.util.Map;
10
11 import freemarker.template.Configuration;
12 import freemarker.template.DefaultObjectWrapper;
13 import freemarker.template.Template;
14
15 public class Test {
16
17 public static void main(String[] args) throws Exception {
18
19 Configuration cfg = new Configuration();
20 //将写好的标签参加,起名叫label
21 cfg.setSharedVariable(label, new LabelDirective());
22 cfg.setDirectoryForTemplateLoading(new File(temp));
23 cfg.setObjectWrapper(new DefaultObjectWrapper());
24
25 Template temp = cfg.getTemplate(list.ftl);
26
27 Map root = new HashMap();
28 root.put(user, rzy);
29
30 / Writer out = new OutputStreamWriter(System.out); /
31
32 File htmlFile = new File(E:/a.html);
33 Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(htmlFile), UTF-8));
34
35 temp.process(root, out);
36 out.flush();
37 }
38 }
模版list.ftl先这么写
<!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Transitional//EN http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>
<html xmlns=http://www.w3.org/1999/xhtml>
<head>
<meta http-equiv=Content-Type content=text/html; charset=utf-8 />
<title>无题目文档</title>
</head>
<body>
<h1>¥{user}自定义标签输出成果</h1><br/>
<@label num=12>
</@label>
</body>
</html>
运行后打开e盘里面生成的a.html成果为:
原来,再大的房子,再大的床,没有相爱的人陪伴,都只是冰冷的物质。而如果身边有爱人陪伴,即使房子小,床小,也觉得无关紧要,因为这些物质上面有了爱的温度,成了家的元素。—— 何珞《婚房》#书摘#
起首是freemarker的jar包:地址
写标签类(须要持续TemplateDirectiveModel接口重写execute办法)
package freemarker;
import java.io.IOException;
import java.io.Writer;
import java.util.Map;
import freemarker.core.Environment;
import freemarker.template.TemplateDirectiveBody;
import freemarker.template.TemplateDirectiveModel;
import freemarker.template.TemplateException;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateNumberModel;
public class LabelDirective implements TemplateDirectiveModel {
@Override
public void execute(Environment env, Map params, TemplateModel[] loopVars,
TemplateDirectiveBody body) throws TemplateException, IOException {
Writer out = env.getOut();
//将模版里的数字参数转化成int类型的办法,,其它类型的转换请看freemarker文档
TemplateModel paramValue = (TemplateModel) params.get(num);
int num = ((TemplateNumberModel) paramValue).getAsNumber().intValue();
out.write(Akishimo num= + params.get(num)+的类型为:+paramValue.getClass());
if (body != null) {
body.render(env.getOut());
}else{
throw new RuntimeException(标签内部至少要加一个空格);
}
}
}
写设备和测试的类:
1 package freemarker;
2
3 import java.io.BufferedWriter;
4 import java.io.File;
5 import java.io.FileOutputStream;
6 import java.io.OutputStreamWriter;
7 import java.io.Writer;
8 import java.util.HashMap;
9 import java.util.Map;
10
11 import freemarker.template.Configuration;
12 import freemarker.template.DefaultObjectWrapper;
13 import freemarker.template.Template;
14
15 public class Test {
16
17 public static void main(String[] args) throws Exception {
18
19 Configuration cfg = new Configuration();
20 //将写好的标签参加,起名叫label
21 cfg.setSharedVariable(label, new LabelDirective());
22 cfg.setDirectoryForTemplateLoading(new File(temp));
23 cfg.setObjectWrapper(new DefaultObjectWrapper());
24
25 Template temp = cfg.getTemplate(list.ftl);
26
27 Map root = new HashMap();
28 root.put(user, rzy);
29
30 / Writer out = new OutputStreamWriter(System.out); /
31
32 File htmlFile = new File(E:/a.html);
33 Writer out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(htmlFile), UTF-8));
34
35 temp.process(root, out);
36 out.flush();
37 }
38 }
模版list.ftl先这么写
<!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Transitional//EN http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>
<html xmlns=http://www.w3.org/1999/xhtml>
<head>
<meta http-equiv=Content-Type content=text/html; charset=utf-8 />
<title>无题目文档</title>
</head>
<body>
<h1>¥{user}自定义标签输出成果</h1><br/>
<@label num=12>
</@label>
</body>
</html>
运行后打开e盘里面生成的a.html成果为:
原来,再大的房子,再大的床,没有相爱的人陪伴,都只是冰冷的物质。而如果身边有爱人陪伴,即使房子小,床小,也觉得无关紧要,因为这些物质上面有了爱的温度,成了家的元素。—— 何珞《婚房》#书摘#