1. 程式人生 > >Java前端Rsa公鑰加密,後端Rsa私鑰解密(支援字元和中文)

Java前端Rsa公鑰加密,後端Rsa私鑰解密(支援字元和中文)

Java前端Rsa公鑰加密,後端Rsa私鑰解密(支援字元和中文)

 

複製程式碼

package com.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

import it.sauronsoftware.base64.Base64;

/** */
/**
 * <p>
 * BASE64編碼解碼工具包
 * </p>
 * <p>
 * 依賴javabase64-1.3.1.jar
 * </p>
 * 
 * @author IceWee
 * @date 2012-5-19
 * @version 1.0
 */
public class Base64Utils {

    /** */
    /**
     * 檔案讀取緩衝區大小
     */
    private static final int CACHE_SIZE = 1024;

    /** */
    /**
     * <p>
     * BASE64字串解碼為二進位制資料
     * </p>
     * 
     * @param base64
     * @return
     * @throws Exception
     */
    public static byte[] decode(String base64) throws Exception {
        return Base64.decode(base64.getBytes());
    }

    /** */
    /**
     * <p>
     * 二進位制資料編碼為BASE64字串
     * </p>
     * 
     * @param bytes
     * @return
     * @throws Exception
     */
    public static String encode(byte[] bytes) throws Exception {
        return new String(Base64.encode(bytes));
    }

    /** */
    /**
     * <p>
     * 將檔案編碼為BASE64字串
     * </p>
     * <p>
     * 大檔案慎用,可能會導致記憶體溢位
     * </p>
     * 
     * @param filePath
     *            檔案絕對路徑
     * @return
     * @throws Exception
     */
    public static String encodeFile(String filePath) throws Exception {
        byte[] bytes = fileToByte(filePath);
        return encode(bytes);
    }

    /** */
    /**
     * <p>
     * BASE64字串轉回檔案
     * </p>
     * 
     * @param filePath
     *            檔案絕對路徑
     * @param base64
     *            編碼字串
     * @throws Exception
     */
    public static void decodeToFile(String filePath, String base64) throws Exception {
        byte[] bytes = decode(base64);
        byteArrayToFile(bytes, filePath);
    }

    /** */
    /**
     * <p>
     * 檔案轉換為二進位制陣列
     * </p>
     * 
     * @param filePath
     *            檔案路徑
     * @return
     * @throws Exception
     */
    public static byte[] fileToByte(String filePath) throws Exception {
        byte[] data = new byte[0];
        File file = new File(filePath);
        if (file.exists()) {
            FileInputStream in = new FileInputStream(file);
            ByteArrayOutputStream out = new ByteArrayOutputStream(2048);
            byte[] cache = new byte[CACHE_SIZE];
            int nRead = 0;
            while ((nRead = in.read(cache)) != -1) {
                out.write(cache, 0, nRead);
                out.flush();
            }
            out.close();
            in.close();
            data = out.toByteArray();
        }
        return data;
    }

    /** */
    /**
     * <p>
     * 二進位制資料寫檔案
     * </p>
     * 
     * @param bytes
     *            二進位制資料
     * @param filePath
     *            檔案生成目錄
     */
    public static void byteArrayToFile(byte[] bytes, String filePath) throws Exception {
        InputStream in = new ByteArrayInputStream(bytes);
        File destFile = new File(filePath);
        if (!destFile.getParentFile().exists()) {
            destFile.getParentFile().mkdirs();
        }
        destFile.createNewFile();
        OutputStream out = new FileOutputStream(destFile);
        byte[] cache = new byte[CACHE_SIZE];
        int nRead = 0;
        while ((nRead = in.read(cache)) != -1) {
            out.write(cache, 0, nRead);
            out.flush();
        }
        out.close();
        in.close();
    }

}

複製程式碼

RsaUtil工具類,可以呼叫裡面的方法,產生公鑰私鑰對,和採用公鑰加密,私鑰加密等

複製程式碼

package com.utils;

import java.io.ByteArrayOutputStream;
import java.security.Key;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.Signature;
import java.security.interfaces.RSAPrivateKey;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.HashMap;
import java.util.Map;

import javax.crypto.Cipher;

/** */
/**
 * <p>
 * RSA公鑰/私鑰/簽名工具包
 * </p>
 * <p>
 * 羅納德·李維斯特(Ron [R]ivest)、阿迪·薩莫爾(Adi [S]hamir)和倫納德·阿德曼(Leonard [A]dleman)
 * </p>
 * <p>
 * 字串格式的金鑰在未在特殊說明情況下都為BASE64編碼格式<br/>
 * 由於非對稱加密速度極其緩慢,一般檔案不使用它來加密而是使用對稱加密,<br/>
 * 非對稱加密演算法可以用來對對稱加密的金鑰加密,這樣保證金鑰的安全也就保證了資料的安全
 * </p>
 * 
 * @author IceWee
 * @date 2012-4-26
 * @version 1.0
 */
public class RSAUtils {

    /** */
    /**
     * 加密演算法RSA
     */
    public static final String KEY_ALGORITHM = "RSA";

    /** */
    /**
     * 簽名演算法
     */
    public static final String SIGNATURE_ALGORITHM = "MD5withRSA";

    /** */
    /**
     * 獲取公鑰的key
     */
    private static final String PUBLIC_KEY = "RSAPublicKey";

    /** */
    /**
     * 獲取私鑰的key
     */
    private static final String PRIVATE_KEY = "RSAPrivateKey";

    /** */
    /**
     * RSA最大加密明文大小
     */
    private static final int MAX_ENCRYPT_BLOCK = 117;

    /** */
    /**
     * RSA最大解密密文大小
     */
    private static final int MAX_DECRYPT_BLOCK = 128;

    /** */
    /**
     * <p>
     * 生成金鑰對(公鑰和私鑰)
     * </p>
     * 
     * @return
     * @throws Exception
     */
    public static Map<String, Object> genKeyPair() throws Exception {
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance(KEY_ALGORITHM);
        keyPairGen.initialize(1024);
        KeyPair keyPair = keyPairGen.generateKeyPair();
        RSAPublicKey publicKey = (RSAPublicKey) keyPair.getPublic();
        RSAPrivateKey privateKey = (RSAPrivateKey) keyPair.getPrivate();
        Map<String, Object> keyMap = new HashMap<String, Object>(2);
        keyMap.put(PUBLIC_KEY, publicKey);
        keyMap.put(PRIVATE_KEY, privateKey);
        return keyMap;
    }

    /** */
    /**
     * <p>
     * 用私鑰對資訊生成數字簽名
     * </p>
     * 
     * @param data
     *            已加密資料
     * @param privateKey
     *            私鑰(BASE64編碼)
     * 
     * @return
     * @throws Exception
     */
    public static String sign(byte[] data, String privateKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        PrivateKey privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initSign(privateK);
        signature.update(data);
        return Base64Utils.encode(signature.sign());
    }

    /** */
    /**
     * <p>
     * 校驗數字簽名
     * </p>
     * 
     * @param data
     *            已加密資料
     * @param publicKey
     *            公鑰(BASE64編碼)
     * @param sign
     *            數字簽名
     * 
     * @return
     * @throws Exception
     * 
     */
    public static boolean verify(byte[] data, String publicKey, String sign) throws Exception {
        byte[] keyBytes = Base64Utils.decode(publicKey);
        X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        PublicKey publicK = keyFactory.generatePublic(keySpec);
        Signature signature = Signature.getInstance(SIGNATURE_ALGORITHM);
        signature.initVerify(publicK);
        signature.update(data);
        return signature.verify(Base64Utils.decode(sign));
    }

    /** */
    /**
     * <P>
     * 私鑰解密
     * </p>
     * 
     * @param encryptedData
     *            已加密資料
     * @param privateKey
     *            私鑰(BASE64編碼)
     * @return
     * @throws Exception
     */
    public static byte[] decryptByPrivateKey(byte[] encryptedData, String privateKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, privateK);
        int inputLen = encryptedData.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 對資料分段解密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_DECRYPT_BLOCK;
        }
        byte[] decryptedData = out.toByteArray();
        out.close();
        return decryptedData;
    }

    /** */
    /**
     * <p>
     * 公鑰解密
     * </p>
     * 
     * @param encryptedData
     *            已加密資料
     * @param publicKey
     *            公鑰(BASE64編碼)
     * @return
     * @throws Exception
     */
    public static byte[] decryptByPublicKey(byte[] encryptedData, String publicKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(publicKey);
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicK = keyFactory.generatePublic(x509KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.DECRYPT_MODE, publicK);
        int inputLen = encryptedData.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 對資料分段解密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_DECRYPT_BLOCK) {
                cache = cipher.doFinal(encryptedData, offSet, MAX_DECRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(encryptedData, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_DECRYPT_BLOCK;
        }
        byte[] decryptedData = out.toByteArray();
        out.close();
        return decryptedData;
    }

    /** */
    /**
     * <p>
     * 公鑰加密
     * </p>
     * 
     * @param data
     *            源資料
     * @param publicKey
     *            公鑰(BASE64編碼)
     * @return
     * @throws Exception
     */
    public static byte[] encryptByPublicKey(byte[] data, String publicKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(publicKey);
        X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key publicK = keyFactory.generatePublic(x509KeySpec);
        // 對資料加密
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, publicK);
        int inputLen = data.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 對資料分段加密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
                cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(data, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_ENCRYPT_BLOCK;
        }
        byte[] encryptedData = out.toByteArray();
        out.close();
        return encryptedData;
    }

    /** */
    /**
     * <p>
     * 私鑰加密
     * </p>
     * 
     * @param data
     *            源資料
     * @param privateKey
     *            私鑰(BASE64編碼)
     * @return
     * @throws Exception
     */
    public static byte[] encryptByPrivateKey(byte[] data, String privateKey) throws Exception {
        byte[] keyBytes = Base64Utils.decode(privateKey);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(keyBytes);
        KeyFactory keyFactory = KeyFactory.getInstance(KEY_ALGORITHM);
        Key privateK = keyFactory.generatePrivate(pkcs8KeySpec);
        Cipher cipher = Cipher.getInstance(keyFactory.getAlgorithm());
        cipher.init(Cipher.ENCRYPT_MODE, privateK);
        int inputLen = data.length;
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        int offSet = 0;
        byte[] cache;
        int i = 0;
        // 對資料分段加密
        while (inputLen - offSet > 0) {
            if (inputLen - offSet > MAX_ENCRYPT_BLOCK) {
                cache = cipher.doFinal(data, offSet, MAX_ENCRYPT_BLOCK);
            } else {
                cache = cipher.doFinal(data, offSet, inputLen - offSet);
            }
            out.write(cache, 0, cache.length);
            i++;
            offSet = i * MAX_ENCRYPT_BLOCK;
        }
        byte[] encryptedData = out.toByteArray();
        out.close();
        return encryptedData;
    }

    /** */
    /**
     * <p>
     * 獲取私鑰
     * </p>
     * 
     * @param keyMap
     *            金鑰對
     * @return
     * @throws Exception
     */
    public static String getPrivateKey(Map<String, Object> keyMap) throws Exception {
        Key key = (Key) keyMap.get(PRIVATE_KEY);
        return Base64Utils.encode(key.getEncoded());
    }

    /** */
    /**
     * <p>
     * 獲取公鑰
     * </p>
     * 
     * @param keyMap
     *            金鑰對
     * @return
     * @throws Exception
     */
    public static String getPublicKey(Map<String, Object> keyMap) throws Exception {
        Key key = (Key) keyMap.get(PUBLIC_KEY);
        return Base64Utils.encode(key.getEncoded());
    }

    /**
     * java端公鑰加密
     */
    public static String encryptedDataOnJava(String data, String PUBLICKEY) {
        try {
            data = Base64Utils.encode(encryptByPublicKey(data.getBytes(), PUBLICKEY));
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return data;
    }

    /**
     * java端私鑰解密
     */
    public static String decryptDataOnJava(String data, String PRIVATEKEY) {
        String temp = "";
        try {
            byte[] rs = Base64Utils.decode(data);
            temp = new String(RSAUtils.decryptByPrivateKey(rs, PRIVATEKEY),"UTF-8"); //以utf-8的方式生成字串

        } catch (Exception e) {
            e.printStackTrace();
        }
        return temp;
    }

}

複製程式碼

json工具類

複製程式碼

package com.utils;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonNull;

public class JsonUtil {

    private static Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd").serializeNulls().create();

    /**
     * @MethodName : toJson
     * @Description : 將物件轉為JSON串,此方法能夠滿足大部分需求
     * @param src
     *            :將要被轉化的物件
     * @return :轉化後的JSON串
     */
    public static String toJson(Object src) {
        if (src == null) {
            return gson.toJson(JsonNull.INSTANCE);
        }
        return gson.toJson(src);
    }
}

複製程式碼

 到這一步我們的工具類準備的差不多了,可以開始進入我們的主題了,java端Rsa測試類和web端互動的demo了

Rsa測試java測試類

複製程式碼

package com.test;

import java.util.Map;

import org.junit.Test;

import com.utils.Base64Utils;
import com.utils.RSAUtils;

public class RSATester {

    static String publicKey;
    static String privateKey;

    static {
        try {
            Map<String, Object> keyMap = RSAUtils.genKeyPair();
            publicKey = RSAUtils.getPublicKey(keyMap);
            privateKey = RSAUtils.getPrivateKey(keyMap);
            System.err.println("公鑰: \n\r" + publicKey);
            System.err.println("私鑰: \n\r" + privateKey);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws Exception {
        testJavaRsa();
    }

    @Test
    public void tests() throws Exception {
        String data = "hNYdT0/8wxljGvLQVPYUDeoWS217rmB5msKOljb6OBsOhdL1Domxt6Sy3BqdGqS3StGJuZuQ9wEFzGdyoTQ7IRiC0gRrkLuxvCUq8FANt1JpJCBqvzLdQD/ygCjkJMWWkMU4EFUW3xYkAsidqM8Zynhpk+mdja3789Ng4s68xJI=";

        String privateKey = "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";
        byte[] rs = Base64Utils.decode(data);

        String r1 = new String(RSAUtils.decryptByPrivateKey(rs, privateKey));

        System.out.println("\r\n\r\n" + r1 + "okb");

    }

    static void testSign() throws Exception {
        System.err.println("私鑰加密——公鑰解密");
        String source = "32232";
        System.out.println("原文字:\r\n" + source);
        byte[] data = source.getBytes();
        byte[] encodedData = RSAUtils.encryptByPrivateKey(data, privateKey);
        System.out.println("加密後:\r\n" + new String(encodedData));
        byte[] decodedData = RSAUtils.decryptByPublicKey(encodedData, publicKey);
        String target = new String(decodedData);
        System.out.println("解密後: \r\n" + target);
        System.err.println("私鑰簽名——公鑰驗證簽名");
        String sign = RSAUtils.sign(encodedData, privateKey);
        System.err.println("簽名:\r" + sign);
        boolean status = RSAUtils.verify(encodedData, publicKey, sign);
        System.err.println("驗證結果:\r" + status);
    }

    static void test() throws Exception {
        System.err.println("公鑰加密——私鑰解密");
        String source = "這是一行沒有任何意義的文字,你看完了等於沒看,不是嗎?";
        System.out.println("\r加密前文字:\r\n" + source);
        byte[] data = source.getBytes();
        byte[] encodedData = RSAUtils.encryptByPublicKey(data, publicKey);
        System.out.println("加密後文字:\r\n" + new String(encodedData));
        System.out.println("----------------:base64處理:" + Base64Utils.encode(encodedData));
        byte[] decodedData = RSAUtils.decryptByPrivateKey(encodedData, privateKey);
        String target = new String(decodedData);
        System.out.println("解密後文字: \r\n" + target);
    }

    /*
     * 測試自己封裝java端加密和解密的方法
     */

    static void testJavaRsa() {
        String PUBLICKEY = "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCcd+0zTY9Gn94iqkQJTlxYnEnCeFsLkk0a7hoAvi2B74VzDVV3xH0ZO9RkXvo1SgCB+uzbEWdrgQkzTqyjfTtgOguu3OnkVxIMJF34ibchTY0LWHGxq1m2gLGuVVqrlu1LtdV0X7xo/5zc8Mr+46veWb86kSpqe6rOAm69WWo5GwIDAQAB";
        String PRIVATEKEY = "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";
        String data = "你好啊,馮老師!s 223 [email protected]";
        data = RSAUtils.encryptedDataOnJava(data, PUBLICKEY);
        System.out.println("加密資料:" + data);

        System.out.println("解密資料:" + RSAUtils.decryptDataOnJava(data, PRIVATEKEY));
    }

    static void testFrontEncrptAndAfterDecrypt() {
        String PRIVATEKEY = "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";
        String data = "FBGU7sQfpSfCgB2hqFuIqkivEUHVRHD8JFdyxYeWqQHsTj9UEuVmvi28n1fOHRwW+3aZD3ttdzfUHWiXD2NErcX/CYs5BtSXT7RcJfWWcXvegq5BBDEAJCADWCRdYnblN+SLUC+ctDXcLw4xmjwAajowSzhCfY/lU3TdnJjO488=";
        System.out.println("解密資料:" + RSAUtils.decryptDataOnJava(data, PRIVATEKEY));
    }

}

複製程式碼

 前端加密jsp頁面

複製程式碼

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="js/jquery-2.1.3.js"></script>
<script src="js/jsencrypt.min.js"></script>
</head>
<body>

    <script type="text/javascript">
        $(function() {
            $("#bt").click(
                    function() {

                        var encrypt = new JSEncrypt();
                        encrypt.setPublicKey($("#publickey").val());
                        encrypt.setPrivateKey($("#privatekey").val());
                        var password = $("#password").val();
                        var uname = $("#uname").val();
                        password = encrypt.encrypt(password);

                        uname = encrypt.encrypt(uname);
                        $("#jmName").val(uname);
                        $("#jmPasswrod").val(password);
                        var jsonData = {
                            "password" : password,
                            "uname" : uname
                        };

                        $.post("jiemi.do", jsonData, function(result) {
                            alert("解密的使用者名稱:" + result.uname + "\n" + "解密的密碼:"
                                    + result.password);

                        }, 'json');
                    });
        });
    </script>
    <h2>公鑰:</h2>
    <textarea id="publickey" rows="5" cols="45">MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCJ9s1qlOyv9qpuaTqauW6fUftzE50rVk3yVPZwv1aO1Ch/XSEz76xCwkyvqpaqceRXrPpdBmO5+ruJ+I8osOHo7L5GWEOcMOO+8izp9hXKBBrmRMD4Egpn00k9DhVIEKp/vyddZPS/doxB8onhN6poTJDLdFLFVEicMf52caN9GQIDAQAB
        </textarea>
    <h2>私鑰</h2>
    <textarea rows="10" cols="45" id="privatekey">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</textarea>
    <hr />
    <form>
        使用者名稱:<input type="text" name="uname" id="uname" /> 密碼:<input
            type="text" name="password" id="password" />
        <hr />
        使用者密文
        <textarea id="jmName">
    </textarea>
        密碼密文
        <textarea id="jmPasswrod">
    </textarea>
        <input type="button" id="bt" value="提交" />
    </form>

</body>
</html>

複製程式碼

 後端servlet解密

複製程式碼

package com;

import java.io.IOException;
import java.util.HashMap;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.utils.JsonUtil;
import com.utils.RSAUtils;

/**
 * Servlet implementation class JieMiServlet
 */
public class JieMiServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        // 獲取資料
        String uname = request.getParameter("uname");
        String password = request.getParameter("password");
        String PRIVATEKEY = "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";
        // 解密
        uname = RSAUtils.decryptDataOnJava(uname, PRIVATEKEY);
        password = RSAUtils.decryptDataOnJava(password, PRIVATEKEY);
        // 用map封裝返回的資料
        HashMap<String, Object> result = new HashMap<String, Object>();
        result.put("uname", uname);
        result.put("password", password);

        response.getWriter().print(JsonUtil.toJson(result));

    }

}

複製程式碼

需要注意的是:前端需要加入jquery-2.1.3.js和jsencrypt.min.js庫,後端需要加入javabase64-1.3.1.jar和gson-2.5.jar(方便json返回)

專案演示程式碼連結:專案demo下載

github的專案連結地址