fix

mallinkService/src/main/java/com/iformall/domain/vo/WxBillSum.java

@@ -65,6 +65,12 @@ public class WxBillSum implements Serializable {
     }
     
     public String getOwe() {
+    	if (StringUtils.isBlank(needPay)) {
+    		needPay = "0";
+    	}
+    	if (StringUtils.isBlank(paid)) {
+    		paid = "0";
+    	}
     	return new BigDecimal(needPay).subtract(new BigDecimal(paid)).toPlainString();
     }
     public BigDecimal getOweNumber() {