freemarker是一个Java template engine，可以基于模板+Data生成对应的HTML web pages, e-mails, configuration files, source code, etc.文件。
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| <dependency>
<groupId>org.freemarker</groupId>
<artifactId>freemarker</artifactId>
<version>2.3.30</version>
</dependency>
|
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| package freemaker.second;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
import freemarker.template.Version;
public class WebServiceGenerator {
private static WebServiceGenerator engine = new WebServiceGenerator();
private Template template = null;
Map<String, Object> dataMap = new HashMap<>();
private WebServiceGenerator() {
try {
init();
} catch (IOException e) {
e.printStackTrace();
}
}
private void init() throws IOException {
Configuration cfg = new Configuration(new Version(2, 3, 30));
String path = Thread.currentThread().getContextClassLoader().getResource("templates").getPath();
cfg.setDirectoryForTemplateLoading(new File(path));
try {
template = cfg.getTemplate("class.ftl");
} catch (IOException e) {
e.printStackTrace();
}
}
public static WebServiceGenerator get() {
return engine;
}
public WebServiceGenerator buildData() {
dataMap.put("package", this.getClass().getPackage() + ";");
dataMap.put("name", "HelloWorldservice");
dataMap.put("return", "String");
dataMap.put("methodname", "hello");
dataMap.put("params", "String name");
dataMap.put("body", "String res= \"Hi\" + name;\n System.out.println(res);");
dataMap.put("val", "res;");
System.out.println("Preparing Data");
return engine;
}
public void writeFile() {
Writer file = null;
try {
file = new FileWriter(new File("HelloWorldservice.java"));
template.process(dataMap, file);
file.flush();
System.out.println("Success");
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
file.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
public static void main(String[] args) {
WebServiceGenerator.get().buildData().writeFile();
}
}
|
class.ftl
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| ${package}
import javax.jws.*;
@WebService()
public class ${name}
{
@WebMethod()
public ${return} ${methodname}(${params})
{
${body}
return ${val}
}
}
|
output:
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| package freemaker.second;
import javax.jws.*;
@WebService()
public class HelloWorldservice {
@WebMethod()
public String hello(String name) {
String res = "Hi" + name;
System.out.println(res);
return res;
}
}
|
reference
https://dzone.com/articles/automated-webservice-code-generation-using-freemar
