update readme

.idea/libraries/Maven__javax_validation_validation_api_1_1_0_Final.xml

@@ -0,0 +1,13 @@
+<component name="libraryTable">
+  <library name="Maven: javax.validation:validation-api:1.1.0.Final">
+    <CLASSES>
+      <root url="jar://J:/localRepo/javax/validation/validation-api/1.1.0.Final/validation-api-1.1.0.Final.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://J:/localRepo/javax/validation/validation-api/1.1.0.Final/validation-api-1.1.0.Final-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES>
+      <root url="jar://J:/localRepo/javax/validation/validation-api/1.1.0.Final/validation-api-1.1.0.Final-sources.jar!/" />
+    </SOURCES>
+  </library>
+</component>

README.md

@@ -0,0 +1,33 @@
+通用工具包
+
+### 说明
+>1. 支持环境：java8
+>2. 该工具包基于springboot提取，按理说适用于所有java工程
+>3. 其中依赖jjwt、validation-api，但不传递依赖
+
+
+### 使用
+>yexuejc.base.version=1.1.2
+
+pom.xml
+```
+<dependencies>
+    <dependency>
+        <groupId>com.github.yexuejc</groupId>
+        <artifactId>yexuejc-base</artifactId>
+        <version>${yexuejc.base.version}</version>
+    </dependency>
+</dependencies>
+<repositories>
+    <repository>
+        <id>jitpack.io</id>
+        <url>https://jitpack.io</url>
+    </repository>
+</repositories>
+```
+
+### 工具文档
+[Wiki](WIKI.md)
+
+### 更新日志
+[更新记录](UPDATE.md)

UPDATE.md

@@ -0,0 +1,30 @@
+yexuejc-base 更新记录
+------------------
+
+#### version ：1.1.2
+**time：** 2018-5-16 15:03:28<br/>
+**branch：** master    <br/>
+**update：**     <br/>
+>1.修改依赖
+
+#
+#### version ：1.1.1
+**time：** 2018-5-12 22:25:05<br/>
+**branch：** master    <br/>
+**update：**     <br/>
+>1.添加RSA
+#
+
+##### version ：1.1.0
+**time：** 2018-5-12 22:25:05<br/>
+**branch：** master    <br/>
+**update：**     <br/>
+>1.添加支持加密功能
+#
+
+#### version ：1.0.0
+**time：** 2018-1-31 12:16:10<br/>
+**branch：** master    <br/>
+**update：**     <br/>
+>1.基于java8开发的web应用工具包
+#

WIKI.md

@@ -0,0 +1,9 @@
+yexuejc-base 文档
+------------------
+
+##### 1. RespsConsts 网络请求统一返回 常量
+##### 2. Resps 网络请求统一返回类
+##### 3. ApiVO 接口交互API
+##### 4. BaseVO 基类VO
+
+待完善......

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.yexuejc.base</groupId>
     <artifactId>yexuejc-base</artifactId>
-    <version>1.0.0</version>
+    <version>1.1.2</version>
 
     <name>${project.artifactId}</name>
 
@@ -20,6 +20,9 @@
         <jjwt.version>0.7.0</jjwt.version>
         <maven.compiler.verbose>true</maven.compiler.verbose>
         <java.version>1.8</java.version>
+        <validation-api.version>1.1.0.Final</validation-api.version>
+        <commons-codec.version>1.10</commons-codec.version>
+        <commons-io.version>2.6</commons-io.version>
     </properties>
 
     <dependencies>
@@ -28,7 +31,25 @@
             <groupId>io.jsonwebtoken</groupId>
             <artifactId>jjwt</artifactId>
             <version>${jjwt.version}</version>
-            <optional>true</optional>
+        </dependency>
+        <!-- 数据校验框架 -->
+        <dependency>
+            <groupId>javax.validation</groupId>
+            <artifactId>validation-api</artifactId>
+            <version>${validation-api.version}</version>
+        </dependency>
+        <!--base64使用到的依赖-->
+        <dependency>
+            <groupId>commons-codec</groupId>
+            <artifactId>commons-codec</artifactId>
+            <version>${commons-codec.version}</version>
+            <scope>compile</scope>
+        </dependency>
+        <!--IOUtils使用到的依赖-->
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>${commons-io.version}</version>
         </dependency>
     </dependencies>
 

src/main/java/com/yexuejc/base/encrypt/RSA.java

@@ -0,0 +1,187 @@
+package com.yexuejc.base.encrypt;
+
+
+import org.apache.commons.codec.binary.Base64;
+import org.apache.commons.io.IOUtils;
+
+import javax.crypto.Cipher;
+import java.io.ByteArrayOutputStream;
+import java.security.*;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.interfaces.RSAPublicKey;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.security.spec.X509EncodedKeySpec;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * RSA加解密 配置模式
+ *
+ * @ClassName: RSA
+ * @Description:
+ * @author: maxf
+ * @date: 2018/5/15 14:39
+ */
+public class RSA {
+
+    public static final String CHARSET = "UTF-8";
+    public static final String RSA_ALGORITHM = "RSA";
+
+    public static Map<String, String> initKeys(int keySize) {
+        //为RSA算法创建一个KeyPairGenerator对象
+        KeyPairGenerator kpg;
+        try {
+            kpg = KeyPairGenerator.getInstance(RSA_ALGORITHM);
+        } catch (NoSuchAlgorithmException e) {
+            throw new IllegalArgumentException("No such algorithm-->[" + RSA_ALGORITHM + "]");
+        }
+
+        //初始化KeyPairGenerator对象,密钥长度
+        kpg.initialize(keySize);
+        //生成密匙对
+        KeyPair keyPair = kpg.generateKeyPair();
+        //得到公钥
+        Key publicKey = keyPair.getPublic();
+        String publicKeyStr = Base64.encodeBase64URLSafeString(publicKey.getEncoded());
+        //得到私钥
+        Key privateKey = keyPair.getPrivate();
+        String privateKeyStr = Base64.encodeBase64URLSafeString(privateKey.getEncoded());
+        Map<String, String> keyPairMap = new HashMap<String, String>();
+        keyPairMap.put("publicKey", publicKeyStr);
+        keyPairMap.put("privateKey", privateKeyStr);
+
+        return keyPairMap;
+    }
+
+
+    /**
+     * 得到公钥
+     *
+     * @param publicKey 密钥字符串（经过base64编码）
+     * @throws Exception
+     */
+    public static RSAPublicKey getPublicKey(String publicKey) throws NoSuchAlgorithmException, InvalidKeySpecException {
+        //通过X509编码的Key指令获得公钥对象
+        KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);
+        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKey));
+        RSAPublicKey key = (RSAPublicKey) keyFactory.generatePublic(x509KeySpec);
+        return key;
+    }
+
+    /**
+     * 得到私钥
+     *
+     * @param privateKey 密钥字符串（经过base64编码）
+     * @throws Exception
+     */
+    public static RSAPrivateKey getPrivateKey(String privateKey) throws NoSuchAlgorithmException, InvalidKeySpecException {
+        //通过PKCS#8编码的Key指令获得私钥对象
+        KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM);
+        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKey));
+        RSAPrivateKey key = (RSAPrivateKey) keyFactory.generatePrivate(pkcs8KeySpec);
+        return key;
+    }
+
+    /**
+     * 公钥加密
+     *
+     * @param data
+     * @param publicKey
+     * @return
+     */
+    public static String publicEncrypt(String data, RSAPublicKey publicKey) {
+        try {
+            Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);
+            cipher.init(Cipher.ENCRYPT_MODE, publicKey);
+            return Base64.encodeBase64URLSafeString(rsaSplitCodec(cipher, Cipher.ENCRYPT_MODE, data.getBytes(CHARSET), publicKey.getModulus().bitLength()));
+        } catch (Exception e) {
+            throw new RuntimeException("加密字符串[" + data + "]时遇到异常", e);
+        }
+    }
+
+    /**
+     * 私钥解密
+     *
+     * @param data
+     * @param privateKey
+     * @return
+     */
+
+    public static String privateDecrypt(String data, RSAPrivateKey privateKey) {
+        try {
+            Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);
+            cipher.init(Cipher.DECRYPT_MODE, privateKey);
+            return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), privateKey.getModulus().bitLength()), CHARSET);
+        } catch (Exception e) {
+            throw new RuntimeException("解密字符串[" + data + "]时遇到异常", e);
+        }
+    }
+
+    /**
+     * 私钥加密
+     *
+     * @param data
+     * @param privateKey
+     * @return
+     */
+
+    public static String privateEncrypt(String data, RSAPrivateKey privateKey) {
+        try {
+            Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);
+            cipher.init(Cipher.ENCRYPT_MODE, privateKey);
+            return Base64.encodeBase64URLSafeString(rsaSplitCodec(cipher, Cipher.ENCRYPT_MODE, data.getBytes(CHARSET), privateKey.getModulus().bitLength()));
+        } catch (Exception e) {
+            throw new RuntimeException("加密字符串[" + data + "]时遇到异常", e);
+        }
+    }
+
+    /**
+     * 公钥解密
+     *
+     * @param data
+     * @param publicKey
+     * @return
+     */
+
+    public static String publicDecrypt(String data, RSAPublicKey publicKey) {
+        try {
+            Cipher cipher = Cipher.getInstance(RSA_ALGORITHM);
+            cipher.init(Cipher.DECRYPT_MODE, publicKey);
+            return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), publicKey.getModulus().bitLength()), CHARSET);
+        } catch (Exception e) {
+            throw new RuntimeException("解密字符串[" + data + "]时遇到异常", e);
+        }
+    }
+
+    private static byte[] rsaSplitCodec(Cipher cipher, int opmode, byte[] datas, int keySize) {
+        int maxBlock = 0;
+        if (opmode == Cipher.DECRYPT_MODE) {
+            maxBlock = keySize / 8;
+        } else {
+            maxBlock = keySize / 8 - 11;
+        }
+        ByteArrayOutputStream out = new ByteArrayOutputStream();
+        int offSet = 0;
+        byte[] buff;
+        int i = 0;
+        try {
+            while (datas.length > offSet) {
+                if (datas.length - offSet > maxBlock) {
+                    buff = cipher.doFinal(datas, offSet, maxBlock);
+                } else {
+                    buff = cipher.doFinal(datas, offSet, datas.length - offSet);
+                }
+                out.write(buff, 0, buff.length);
+                i++;
+                offSet = i * maxBlock;
+            }
+        } catch (Exception e) {
+            throw new RuntimeException("加解密阀值为[" + maxBlock + "]的数据时发生异常", e);
+        }
+        byte[] resultDatas = out.toByteArray();
+        IOUtils.closeQuietly(out);
+        return resultDatas;
+    }
+
+}

src/main/java/com/yexuejc/base/encrypt/RSA2.java

@@ -0,0 +1,62 @@
+package com.yexuejc.base.encrypt;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.security.KeyStore;
+import java.security.KeyStoreException;
+import java.security.NoSuchAlgorithmException;
+import java.security.UnrecoverableKeyException;
+import java.security.cert.Certificate;
+import java.security.cert.CertificateException;
+import java.security.cert.CertificateFactory;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.interfaces.RSAPublicKey;
+
+/**
+ * RSA加解密 证书模式
+ * 依赖 {@link RSA}
+ * @ClassName: RSA2
+ * @Description:
+ * @author: maxf
+ * @date: 2018/5/15 14:37
+ */
+public class RSA2 {
+
+    public static final String CHARSET = "UTF-8";
+    public static final String RSA_ALGORITHM = "RSA";
+
+    /**
+     * 得到公钥
+     *
+     * @param filepath 密钥文件路径
+     * @throws Exception
+     */
+    public static RSAPublicKey getPublicKey(String filepath) throws CertificateException, FileNotFoundException {
+        //通过证书,获取公钥
+        CertificateFactory cf = null;
+        cf = CertificateFactory.getInstance("X.509");
+        Certificate c = cf.generateCertificate(new FileInputStream(filepath));
+        return (RSAPublicKey) c.getPublicKey();
+    }
+
+    /**
+     * 得到私钥
+     *
+     * @param filepath 私钥路径
+     * @param alias    证书别名
+     * @param password 证书密码
+     * @return
+     * @throws NoSuchAlgorithmException
+     * @throws KeyStoreException
+     * @throws IOException
+     * @throws CertificateException
+     * @throws UnrecoverableKeyException
+     */
+    public static RSAPrivateKey getPrivateKey(String filepath, String alias, String password) throws NoSuchAlgorithmException, KeyStoreException, IOException, CertificateException, UnrecoverableKeyException {
+        KeyStore ks = KeyStore.getInstance("JKS");
+        ks.load(new FileInputStream(filepath), password.toCharArray());
+        return (RSAPrivateKey) ks.getKey(alias, password.toCharArray());
+    }
+
+}

src/main/java/com/yexuejc/base/http/Resps.java

@@ -20,6 +20,10 @@ public class Resps<T> implements Serializable {
      * 状态
      */
     private String code;
+    /**
+     * md5码
+     */
+    private String sign;
     /**
      * 内容
      */
@@ -133,6 +137,14 @@ public class Resps<T> implements Serializable {
         this.msg = msg;
     }
 
+    public String getSign() {
+        return sign;
+    }
+
+    public void setSign(String sign) {
+        this.sign = sign;
+    }
+
     @Override
     public String toString() {
         return JsonUtil.obj2Json(this);

src/main/java/com/yexuejc/base/pojo/BaseVO.java

@@ -5,6 +5,7 @@ import com.yexuejc.base.util.JsonUtil;
 import java.io.Serializable;
 
 /**
+ * 基类VO
  * @PackageName: com.yexuejc.util.base.pojo
  * @Description:
  * @author: maxf

src/main/java/com/yexuejc/base/pojo/PagerVO.java

@@ -0,0 +1,49 @@
+package com.yexuejc.base.pojo;
+
+import com.yexuejc.base.util.JsonUtil;
+
+import javax.validation.constraints.Min;
+import javax.validation.constraints.NotNull;
+
+/**
+ * 分页 VO
+ *
+ * @author: maxf
+ * @date: 2018/3/28 14:23
+ */
+public class PagerVO extends BaseVO {
+
+    private static final long serialVersionUID = 3490440129554644587L;
+
+    @NotNull
+    @Min(1L)
+    private Integer page = 1;
+    @NotNull
+    @Min(1L)
+    private Integer size = 20;
+
+    public int getOffset() {
+        return (this.page - 1) * this.size;
+    }
+
+    @Override
+    public String toString() {
+        return JsonUtil.obj2Json(this);
+    }
+
+    public Integer getPage() {
+        return page;
+    }
+
+    public void setPage(Integer page) {
+        this.page = page;
+    }
+
+    public Integer getSize() {
+        return size;
+    }
+
+    public void setSize(Integer size) {
+        this.size = size;
+    }
+}

src/main/java/com/yexuejc/base/pojo/ParamsPO.java

@@ -0,0 +1,45 @@
+package com.yexuejc.base.pojo;
+
+import com.yexuejc.base.util.JsonUtil;
+
+import java.io.Serializable;
+
+/**
+ * 解密前的请求参数格式
+ *
+ * @author: maxf
+ * @date: 2018/5/12 14:52
+ */
+public class ParamsPO implements Serializable {
+    private static final long serialVersionUID = 9171765814642105098L;
+
+    /**
+     * 参数
+     */
+    private String data;
+    /**
+     * md5
+     */
+    private String sign;
+
+    @Override
+    public String toString() {
+        return JsonUtil.obj2Json(this);
+    }
+
+    public String getData() {
+        return data;
+    }
+
+    public void setData(String data) {
+        this.data = data;
+    }
+
+    public String getSign() {
+        return sign;
+    }
+
+    public void setSign(String sign) {
+        this.sign = sign;
+    }
+}

src/main/java/com/yexuejc/base/util/JwtUtil.java

@@ -12,7 +12,7 @@ public class JwtUtil {
     /** token类型 */
     private static String JWT_HEADER_TYP = "JWT";
     /** token发行商 */
-    private static String JWT_CLAIMS_ISS = "uselaw.com";
+    private static String JWT_CLAIMS_ISS = "yexuejc.com";
 
     /**
      * 加密内容生成token

src/main/java/com/yexuejc/base/util/StrUtil.java

@@ -3,37 +3,52 @@ package com.yexuejc.base.util;
 import java.io.UnsupportedEncodingException;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.UUID;
+import java.util.*;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import static java.util.regex.Pattern.compile;
-
 /**
- * @PackageName: com.yexuejc.util.base.util
+ * 字符串工具类
+ *
+ * @ClassName: StrUtil
  * @Description:
  * @author: maxf
- * @date: 2017/12/28 17:34
+ * @date: 2018/5/12 19:13
  */
 public final class StrUtil {
-    public static char[] HEX_CHAR = new char[]{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
-            'e', 'f'};
-
-    private StrUtil() {
-    }
+    public static char[] HEX_CHAR = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
 
+    /**
+     * 判断字符串，数组，集合 是否为空
+     *
+     * @param obj
+     * @return
+     */
     public static boolean isEmpty(Object obj) {
         if (obj instanceof String) {
-            return obj == null || "".equals((String) obj);
+            if (obj == null || "".equals((String) obj)) {
+                return true;
+            } else {
+                return false;
+            }
         } else if (obj instanceof Object[]) {
-            return obj == null || ((Object[]) ((Object[]) obj)).length == 0;
-        } else if (obj instanceof Collection) {
-            return obj == null || ((Collection) obj).size() == 0;
+            if (obj == null || ((Object[]) obj).length == 0) {
+                return true;
+            } else {
+                return false;
+            }
+        } else if (obj instanceof Collection<?>) {
+            if (obj == null || ((Collection<?>) obj).size() == 0) {
+                return true;
+            } else {
+                return false;
+            }
         } else {
-            return obj == null;
+            if (obj == null) {
+                return true;
+            } else {
+                return false;
+            }
         }
     }
 
@@ -41,10 +56,23 @@ public final class StrUtil {
         return !isEmpty(obj);
     }
 
+    /**
+     * 生成UUID
+     *
+     * @return
+     */
     public static String genUUID() {
         return UUID.randomUUID().toString().replaceAll("-", "");
     }
 
+    /**
+     * 生成11位编号，可以用作订单号，有很小几率出现重复，需要做异常处理<br/>
+     * 左边第一位为正负标识：正数1 负数0<br/>
+     * 剩余位数为UUID的hashcode值<br/>
+     * 可以再生成的编号基础上嵌入其他标识编码
+     *
+     * @return
+     */
     public static String genNum() {
         int hashCode = UUID.randomUUID().toString().hashCode();
         StringBuffer num = new StringBuffer();
@@ -54,131 +82,215 @@ public final class StrUtil {
         } else {
             num.append("1");
         }
-
         return num.append(String.format("%010d", hashCode)).toString().substring(0, 8);
     }
 
+    /**
+     * 解析aa=bb&cc=dd&ee=ff格式的字符串，返回HashMap
+     *
+     * @param urlencoded
+     * @return
+     */
     public static Map<String, String> parseUrlencoded(String urlencoded) {
         if (isEmpty(urlencoded)) {
             return null;
-        } else {
-            String[] entrys = urlencoded.split("&");
-            if (isEmpty(entrys)) {
-                return null;
+        }
+        String[] entrys = urlencoded.split("&");
+        if (isEmpty(entrys)) {
+            return null;
+        }
+
+        Map<String, String> map = new HashMap<String, String>();
+        String[] kv = null;
+        for (String entry : entrys) {
+            if (isEmpty(entry)) {
+                continue;
+            }
+            kv = entry.split("=");
+            if (isEmpty(kv)) {
+                continue;
+            }
+            if (kv.length > 1) {
+                map.put(kv[0], kv[1]);
             } else {
-                Map<String, String> map = new HashMap();
-                String[] kv = null;
-                String[] var4 = entrys;
-                int var5 = entrys.length;
-
-                for (int var6 = 0; var6 < var5; ++var6) {
-                    String entry = var4[var6];
-                    if (!isEmpty(entry)) {
-                        kv = entry.split("=");
-                        if (!isEmpty(kv)) {
-                            if (kv.length > 1) {
-                                map.put(kv[0], kv[1]);
-                            } else {
-                                map.put(kv[0], null);
-                            }
-                        }
-                    }
-                }
-
-                return map;
+                map.put(kv[0], null);
             }
         }
+        return map;
     }
 
-    public static String toHex(byte[] buf) {
+    /**
+     * 字符串转换方法 把字节数组转换成16进制字符串
+     *
+     * @param buf 初始字节数组
+     * @return 转换后字符串
+     */
+    public static String toHex(byte buf[]) {
         StringBuffer strbuf = new StringBuffer(buf.length * 2);
-
-        for (int i = 0; i < buf.length; ++i) {
-            if ((buf[i] & 255) < 16) {
+        int i;
+        for (i = 0; i < buf.length; i++) {
+            if (((int) buf[i] & 0xff) < 0x10) {
                 strbuf.append("0");
             }
-
-            strbuf.append(Long.toString((long) (buf[i] & 255), 16));
+            strbuf.append(Long.toString((int) buf[i] & 0xff, 16));
         }
-
         return strbuf.toString();
     }
 
+    /**
+     * 获取字符串的MD5码
+     *
+     * @param str
+     * @return
+     */
     public static String toMD5(String str) {
         if (str == null) {
             return null;
-        } else {
-            MessageDigest md = null;
-
-            try {
-                md = MessageDigest.getInstance("MD5");
-            } catch (NoSuchAlgorithmException var3) {
-                var3.printStackTrace();
-                return null;
-            }
-
-            md.update(str.getBytes());
-            byte[] tmp = md.digest();
-            return toHex(tmp);
         }
+        MessageDigest md = null;
+        try {
+            md = java.security.MessageDigest.getInstance("MD5");
+        } catch (NoSuchAlgorithmException e) {
+            e.printStackTrace();
+            return null;
+        }
+        md.update(str.getBytes());
+        byte tmp[] = md.digest();
+        return toHex(tmp);
     }
 
+    /**
+     * SHA256加密
+     *
+     * @param str
+     * @return
+     */
+    public static String toSHA256(final String str) {
+        return toSHA(str, "SHA-256");
+    }
+
+    /**
+     * SHA加密
+     *
+     * @param str
+     * @param key
+     * @return
+     */
+    public static String toSHA(final String str, final String key) {
+        // 是否是有效字符串
+        if (str == null) {
+            return null;
+        }
+        MessageDigest messageDigest = null;
+        try {
+            messageDigest = MessageDigest.getInstance(key);
+        } catch (NoSuchAlgorithmException e) {
+            e.printStackTrace();
+            return null;
+        }
+        messageDigest.update(str.getBytes());
+        byte tmp[] = messageDigest.digest();
+        return toHex(tmp);
+    }
+
+    /**
+     * 用ISO-8859-1解码 再用UFT-8编码
+     *
+     * @param str
+     * @return
+     */
     public static String iso2utf(String str) {
         String utfStr = null;
-
         try {
             utfStr = new String(str.getBytes("ISO-8859-1"), "utf-8");
-        } catch (UnsupportedEncodingException var3) {
-            var3.printStackTrace();
+        } catch (UnsupportedEncodingException e) {
+            e.printStackTrace();
         }
-
         return utfStr;
     }
 
+    /**
+     * 判断字符串是否是数字
+     *
+     * @param str
+     * @return
+     */
     public static boolean isNumeric(String str) {
-        Pattern pattern = compile("[0-9]*");
+        Pattern pattern = Pattern.compile("[0-9]*");
         Matcher isNum = pattern.matcher(str);
-        return isNum.matches();
+        if (!isNum.matches()) {
+            return false;
+        }
+        return true;
     }
 
+    /**
+     * 对ID（32位）进行编码
+     *
+     * @param id
+     * @return
+     */
     public static String codeId(String id) {
-        if (id != null && id.length() == 32) {
-            StringBuilder coded = new StringBuilder();
-
-            int i;
-            for (i = 0; i < 13; ++i) {
-                coded.append(HEX_CHAR[(int) (Math.random() * 15.0D) + 1]);
-            }
-
-            coded.append(id.substring(0, 11));
-
-            for (i = 0; i < 7; ++i) {
-                coded.append(HEX_CHAR[(int) (Math.random() * 15.0D) + 1]);
-            }
-
-            coded.append(id.substring(11));
-
-            for (i = 0; i < 12; ++i) {
-                coded.append(HEX_CHAR[(int) (Math.random() * 15.0D) + 1]);
-            }
-
-            return coded.toString();
-        } else {
+        if (id == null || id.length() != 32) {
             return id;
         }
+
+        StringBuilder coded = new StringBuilder();
+        for (int i = 0; i < 13; i++) {
+            coded.append(HEX_CHAR[(int) (Math.random() * 15L) + 1]);
+        }
+        coded.append(id.substring(0, 11));
+        for (int i = 0; i < 7; i++) {
+            coded.append(HEX_CHAR[(int) (Math.random() * 15L) + 1]);
+        }
+        coded.append(id.substring(11));
+        for (int i = 0; i < 12; i++) {
+            coded.append(HEX_CHAR[(int) (Math.random() * 15L) + 1]);
+        }
+
+        return coded.toString();
     }
 
+    /**
+     * 对ID（32位）进行解码
+     *
+     * @param coded
+     * @return
+     */
     public static String decodeId(String coded) {
-        if (coded != null && coded.length() == 64) {
-            StringBuilder id = new StringBuilder();
-            id.append(coded.substring(13, 24));
-            id.append(coded.substring(31, 52));
-            return id.toString();
-        } else {
+        if (coded == null || coded.length() != 64) {
             return coded;
         }
+
+        StringBuilder id = new StringBuilder();
+        id.append(coded.substring(13, 24));
+        id.append(coded.substring(31, 52));
+
+        return id.toString();
     }
 
+    /**
+     * map parameters 转url parameters
+     *
+     * @param sortedParams
+     * @return
+     */
+    public static String getSignContent(Map<String, ?> sortedParams) {
+        StringBuffer content = new StringBuffer();
+        List<String> keys = new ArrayList<>(sortedParams.keySet());
+        Collections.sort(keys);
+        int index = 0;
+
+        for (int i = 0; i < keys.size(); ++i) {
+            String key = keys.get(i);
+            Object value = sortedParams.get(key);
+            if (isNotEmpty(key) && isNotEmpty(value)) {
+                content.append((index == 0 ? "" : "&") + key + "=" + value);
+                ++index;
+            }
+        }
+        return content.toString();
+    }
 
     /**
      * 替换手机号中间4位为*
@@ -192,4 +304,38 @@ public final class StrUtil {
     public static String replaceMobile(String mobile) {
         return mobile.replaceAll("(\\d{3})\\d{4}(\\d{4})", "$1****$2");
     }
+
+    /**
+     * map 排序
+     *
+     * @param sortedParams
+     * @return
+     */
+    public static Map<String, Object> mapSort(Map<String, ?> sortedParams) {
+        Map<String, Object> map = new HashMap<>();
+        List<String> keys = new ArrayList<>(sortedParams.keySet());
+        Collections.sort(keys);
+        int index = 0;
+        for (int i = 0; i < keys.size(); ++i) {
+            String key = keys.get(i);
+            Object value = sortedParams.get(key);
+            map.put(key, value);
+            ++index;
+        }
+        return map;
+    }
+
+    /**
+     * 设置Str带默认值
+     *
+     * @param msg
+     * @param defMsg
+     * @return
+     */
+    public static String setStr(String msg, String defMsg) {
+        if (StrUtil.isEmpty(msg)) {
+            return defMsg;
+        }
+        return msg;
+    }
 }

src/main/java/com/yexuejc/base/util/SysUtils.java

@@ -1,5 +1,7 @@
 package com.yexuejc.base.util;
 
+import java.net.URL;
+
 /**
  * 系统工具类
  *
@@ -22,4 +24,15 @@ public class SysUtils {
     public static String getCachePath() {
         return System.getProperty(PROJECT_ROOT_PATH);
     }
+
+    /**
+     * 从根路径获取文件URL
+     *
+     * @param clazz
+     * @return
+     */
+    public static URL getRootPath(Class clazz, String filePath) {
+        return clazz.getClass().getResource(StrUtil.setStr(filePath, "/"));
+    }
+
 }