优化代码

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/ExceptionUtil.java

@@ -18,8 +18,7 @@ public class ExceptionUtil
     {
         StringWriter sw = new StringWriter();
         e.printStackTrace(new PrintWriter(sw, true));
-        String str = sw.toString();
-        return str;
+        return sw.toString();
     }
 
     public static String getRootErrorMessage(Exception e)

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/ServletUtils.java

@@ -161,9 +161,8 @@ public class ServletUtils
      * 
      * @param response 渲染对象
      * @param string 待渲染的字符串
-     * @return null
      */
-    public static String renderString(HttpServletResponse response, String string)
+    public static void renderString(HttpServletResponse response, String string)
     {
         try
         {
@@ -176,7 +175,6 @@ public class ServletUtils
         {
             e.printStackTrace();
         }
-        return null;
     }
 
     /**
@@ -187,13 +185,13 @@ public class ServletUtils
     public static boolean isAjaxRequest(HttpServletRequest request)
     {
         String accept = request.getHeader("accept");
-        if (accept != null && accept.indexOf("application/json") != -1)
+        if (accept != null && accept.contains("application/json"))
         {
             return true;
         }
 
         String xRequestedWith = request.getHeader("X-Requested-With");
-        if (xRequestedWith != null && xRequestedWith.indexOf("XMLHttpRequest") != -1)
+        if (xRequestedWith != null && xRequestedWith.contains("XMLHttpRequest"))
         {
             return true;
         }
@@ -205,11 +203,7 @@ public class ServletUtils
         }
 
         String ajax = request.getParameter("__ajax");
-        if (StringUtils.inStringIgnoreCase(ajax, "json", "xml"))
-        {
-            return true;
-        }
-        return false;
+        return StringUtils.inStringIgnoreCase(ajax, "json", "xml");
     }
 
     /**

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/file/ImageUtils.java

@@ -55,7 +55,7 @@ public class ImageUtils
     /**
      * 读取文件为字节数据
      * 
-     * @param key 地址
+     * @param url 地址
      * @return 字节数据
      */
     public static byte[] readFile(String url)

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/poi/ExcelUtil.java

@@ -944,7 +944,7 @@ public class ExcelUtil<T>
         if (StringUtils.isNotEmpty(excel.targetAttr()))
         {
             String target = excel.targetAttr();
-            if (target.indexOf(".") > -1)
+            if (target.contains("."))
             {
                 String[] targets = target.split("[.]");
                 for (String name : targets)
@@ -1039,7 +1039,7 @@ public class ExcelUtil<T>
         for (Object[] os : this.fields)
         {
             Excel excel = (Excel) os[1];
-            maxHeight = maxHeight > excel.height() ? maxHeight : excel.height();
+            maxHeight = Math.max(maxHeight, excel.height());
         }
         return (short) (maxHeight * 20);
     }

ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/sql/SqlUtil.java

@@ -50,9 +50,9 @@ public class SqlUtil
             return;
         }
         String[] sqlKeywords = StringUtils.split(SQL_REGEX, "\\|");
-        for (int i = 0; i < sqlKeywords.length; i++)
+        for (String sqlKeyword : sqlKeywords)
         {
-            if (StringUtils.indexOfIgnoreCase(value, sqlKeywords[i]) > -1)
+            if (StringUtils.indexOfIgnoreCase(value, sqlKeyword) > -1)
             {
                 throw new UtilException("参数存在SQL注入风险");
             }