import java.lang.reflect.Method;

import java.util.Properties;

public class MixAll {

    /**

     * 将Properties中的值写入Object

     */

    public static void properties2Object(final Properties p, final Object object) {

        Method[] methods = object.getClass().getMethods();

        for (Method method : methods) {

            String mn = method.getName();

            if (mn.startsWith("set")) {

                try {

                    String tmp = mn.substring(4);

                    String first = mn.substring(3, 4);

                    String key = first.toLowerCase() + tmp;

                    String property = p.getProperty(key);

                    if (property != null) {

                        Class<?>[] pt = method.getParameterTypes();

                        if (pt != null && pt.length > 0) {

                            String cn = pt[0].getSimpleName();

                            Object arg = null;

                            if (cn.equals("int")) {

                                arg = Integer.parseInt(property);

                            } else if (cn.equals("long")) {

                                arg = Long.parseLong(property);

                            } else if (cn.equals("double")) {

                                arg = Double.parseDouble(property);

                            } else if (cn.equals("boolean")) {

                                arg = Boolean.parseBoolean(property);

                            } else if (cn.equals("String")) {

                                arg = property;

                            } else {

                                continue;

                            }

                            method.invoke(object, new Object[] { arg });

                        }

                    }

                } catch (Throwable e) {

                }

            }

        }

    }

}

public class PersonConfig {

    private String name;

    private int age;

    private double saving;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public double getSaving() {

        return saving;

    }

    public void setSaving(double saving) {

        this.saving = saving;

    }

    @Override

    public String toString() {

        return "PersonConfig [name=" + name + ", age=" + age + ", saving="

                + saving + "]";

    }

}

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.Properties;

import org.apache.commons.cli.CommandLine;

import org.apache.commons.cli.CommandLineParser;

import org.apache.commons.cli.DefaultParser;

import org.apache.commons.cli.Option;

import org.apache.commons.cli.Options;

import org.apache.commons.cli.ParseException;

public class TestCommandline {

    public static void main(String[] args) throws ParseException, IOException {

        Options options = new Options();

        Option opt = new Option("c", "config", true, "config file path");

        opt.setRequired(true);

        options.addOption(opt);

        CommandLineParser parser = new DefaultParser();

        CommandLine commandLine = parser.parse(options, args);

        String optNmae = "c";

        if (commandLine.hasOption(optNmae)) {

            File file = new File(commandLine.getOptionValue(optNmae));

            InputStream in = new BufferedInputStream(new FileInputStream(file));

            Properties properties = new Properties();

            properties.load(in);

            PersonConfig personConfig = new PersonConfig();

            System.out.println(personConfig); // 前

            MixAll.properties2Object(properties, personConfig);

            System.out.println(personConfig); // 后

            System.out.println("load config properties file OK, " + file);

            in.close();

        }

    }

}

name=Zno

age=18

saving=200.0

PersonConfig [name=null, age=, saving=0.0]

PersonConfig [name=Zno, age=, saving=200.0]

load config properties file OK, E:\config\person.properties

　　　 　import org.apache.commons.beanutils.BeanUtils;

        public void clean() {

            Field[] fields = this.getClass().getDeclaredFields();

            for (Field field : fields) {

                try {

                    String name = field.getName();

                    String property = BeanUtils.getProperty(this, name);

                    if ("未知".equals(property)) {

                        BeanUtils.setProperty(this, name, null);

                    }

                } catch (Exception e) {

                }

            }

        }