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@@ -0,0 +1,55 @@
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+package org.diagbot.graph;
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+
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+import org.apache.commons.lang3.StringUtils;
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+import org.junit.Test;
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+
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+import java.util.ArrayList;
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+import java.util.HashMap;
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+import java.util.List;
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+import java.util.Map;
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+
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+/**
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+ * 测试类
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+ */
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+public class DemoTest {
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+ /**
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+ * 测试map,如果map为空返回什么
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+ */
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+ @Test
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+ public void MapTest(){
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+ Map<String,String> k = new HashMap<>();
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+ if(k.size()>0){
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+ System.out.println("map不为空!!");
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+ }else {
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+ System.out.println("map为空!!!");
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+ }
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+ System.out.println(k.get("dd"));
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+ }
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+
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+ /**
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+ * 测试list
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+ */
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+ @Test
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+ public void ListTest(){
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+ List<String> testList = null;
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+ testList = new ArrayList<>();
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+ if(testList.size()>0){
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+ System.out.println("list不为空!!!");
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+ }else {
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+ System.out.println("list为空!!!");
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+ }
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+ }
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+
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+ /**
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+ * 测试string
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+ */
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+ @Test
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+ public void stringTest(){
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+ String k="";
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+ if(StringUtils.isNotEmpty(k)){
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+ System.out.println("k不为空!!!");
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+ }else {
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+ System.out.println("k为空!!!");
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+ }
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+ }
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+}
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