com.framework.infrastructure.utils.StringUtilsTest.java Source code

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Here is the source code for com.framework.infrastructure.utils.StringUtilsTest.java

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/**
 * Copyright (c) 2011-20012 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * 
 * Id StringUtilsTest.java 9:41:52 chenwentao
 */
package com.framework.infrastructure.utils;

import java.util.List;
import java.util.Map;

import junit.framework.Assert;

import org.apache.commons.lang.StringUtils;
import org.junit.Test;

import com.google.common.base.Joiner;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

/**
 *
 * @author chenwentao
 *
 */
public class StringUtilsTest {

    @Test
    public void utilsByApache() {
        //join
        List<String> inputList = Lists.newArrayList("a", "b", "c");
        String result = StringUtils.join(inputList, ",");
        Assert.assertEquals("a,b,c", result);

        Assert.assertEquals("001", StringUtils.leftPad("1", 3, "0"));
    }

    @Test
    public void joinByGuava() {

        //Null
        String[] fantasyGenres = { "Space Opera", null, "Horror", "Magic realism", null, "Religion" };
        String joined = Joiner.on(", ").skipNulls().join(fantasyGenres);
        System.out.println(joined);

        //Null.
        String[] fantasyGenres2 = { "Space Opera", null, "Horror", "Magic realism", null, "Religion" };
        joined = Joiner.on(", ").useForNull("NULL!!!").join(fantasyGenres2);
        System.out.println(joined);

        //join Map
        Map<Integer, String> map = Maps.newHashMap();
        map.put(1, "Space Opera");
        map.put(2, "Horror");
        map.put(3, "Magic realism");
        joined = Joiner.on(",").withKeyValueSeparator(":").join(map);
        System.out.println(joined);

        //append
        StringBuilder sb = new StringBuilder("StringBulder Demo: ");
        joined = Joiner.on(", ").skipNulls().appendTo(sb, fantasyGenres).toString();
        System.out.println(joined);
    }
}