升级新版本

yzg-util-base/src/main/java/com/yanzuoguang/util/helper/StringHelper.java

@@ -5,9 +5,11 @@ import com.yanzuoguang.util.base.ObjectHelper;
 import com.yanzuoguang.util.exception.ExceptionHelper;
 
 import java.io.UnsupportedEncodingException;
+import java.math.BigDecimal;
 import java.nio.charset.StandardCharsets;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
+import java.text.DecimalFormat;
 import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -444,7 +446,16 @@ public class StringHelper {
         }
     }
 
-    private static boolean isBaseType(String clsName, Class<?> cls, Class<?> fromCls, Object fromValue) {
+    /**
+     * 是否属于基础类型
+     *
+     * @param clsName   基础类型名称
+     * @param cls       基础类型
+     * @param fromCls   来源类型
+     * @param fromValue 基础类型值
+     * @return 是否属于基础类型
+     */
+    public static boolean isBaseType(String clsName, Class<?> cls, Class<?> fromCls, Object fromValue) {
         if (clsName.equals(fromCls.getName())) {
             return true;
         }
@@ -461,7 +472,32 @@ public class StringHelper {
      * @return 转换成功的字符串
      */
     public static String toString(Object obj) {
-        return obj == null ? null : obj.toString();
+        Class<?> fromCls = obj != null ? obj.getClass() : Object.class;
+        boolean isDouble = StringHelper.isBaseType(StringHelper.TYPE_DOUBLE, Double.class, fromCls, obj);
+        boolean isFromDouble = obj instanceof BigDecimal || isDouble;
+
+        if (isFromDouble) {
+            // 格式化设置(显示所有整数部分，小数点保留2位)
+            DecimalFormat decimalFormat = new DecimalFormat("#.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000");
+            String to = decimalFormat.format(obj);
+            String[] split = to.split("\\.");
+            StringBuilder sb = new StringBuilder(split[0]);
+            if (sb.length() == 0) {
+                sb.append("0");
+            }
+            if (split.length > 1) {
+                // 去掉右边的0
+                String right = StringHelper.trimRight(split[1], "0");
+                if (!right.isEmpty()) {
+                    sb.append(".");
+                    sb.append(right);
+                }
+            }
+            return sb.toString();
+        } else {
+            return obj == null ? null : obj.toString();
+        }
+
     }
 
     /**

yzg-util-base/src/test/java/helper/TestStringHelper.java

@@ -4,6 +4,8 @@ import com.yanzuoguang.util.helper.StringHelper;
 import org.junit.Assert;
 import org.junit.Test;
 
+import java.math.BigDecimal;
+
 public class TestStringHelper {
     @Test
     public void testFirstRun() {
@@ -38,5 +40,25 @@ public class TestStringHelper {
         System.out.println(StringHelper.trim("1005050103", "1", "0", "3"));
     }
 
+    @Test
+    public void testToString() {
+        System.out.println(StringHelper.toString(0.0000000));
+        System.out.println(StringHelper.toString(50.0000001));
+        System.out.println(StringHelper.toString(0.02));
+        System.out.println(StringHelper.toString(0.0000001));
+        System.out.println(StringHelper.toString(50.00050000));
+        System.out.println(StringHelper.toString(0.00050000));
+        System.out.println(StringHelper.toString(0.1000000));
+        System.out.println(StringHelper.toString(5.1000000));
+        System.out.println(StringHelper.toString(100.1000000));
+
+
+        System.out.println(StringHelper.toString(new BigDecimal("0.0000000")));
+        System.out.println(StringHelper.toString(new BigDecimal("0.0000001")));
+        System.out.println(StringHelper.toString(new BigDecimal("0.00050000")));
+        System.out.println(StringHelper.toString(new BigDecimal("0.1000000")));
+        System.out.println(StringHelper.toString(new BigDecimal("100.1000000")));
+    }
+
 
 }