前端代码 ：
　　　　　　$.ajax({

            　　 type:"GET",

                url:"http://localhost:8084/getPulbicKey",

                dataType:"json",

                success:function(data){

                 console.log(data);

                 var encrypt = new JSEncrypt();

                    encrypt.setPublicKey(data);

                    var encryptData = encrypt.encrypt("abc");//加密后的字符串  JSON加密

                    console.log(encryptData)

                        $.ajax({

                           　　 type:"GET",

                               url:"http://localhost:8084/decrypt",

                               dataType:"json",

                               data:{"encrypt":encryptData},

                               success:function(data){

                                   console.log(data);

                               },

                               error:function(data){

                                   console.log("error:"+data);

                               }

                        });

                },

                error:function(data){

                    console.log("error:"+data);

                }

         });        

package com.tran.demo.controller;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.Properties;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.core.io.ClassPathResource;

import org.springframework.core.io.Resource;

import org.springframework.stereotype.Controller;

import org.springframework.util.ResourceUtils;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import com.tran.demo.utils.SecurityUtil;

import com.tran.demo.utils.RetResponse;

import com.tran.demo.utils.RetResult;

import cn.hutool.crypto.asymmetric.RSA;

@Controller

public class WebController {

    private final static Logger log = LoggerFactory.getLogger(WebController.class);

    private final static String publicKey = "PUBLIC_KEY";

    private final static String privateKey = "PRIVATE_KEY";

    @RequestMapping("/index")

    public String index() {

        return "index";

    }

    @RequestMapping("/decrypt")

    @ResponseBody

    public RetResult decrypt(byte [] encrypt) throws Exception {

        File file = ResourceUtils.getFile("classpath:keys/secret_key.txt");

        Properties pro = new Properties();//创建集合

        　　  pro.load(new FileInputStream(file));

        System.out.println("PUBLIC_KEY"+pro.get("PRIVATE_KEY"));

        System.out.println("PRIVATE_KEY"+pro.get("PUBLIC_KEY"));

        String decryptRSADefault = SecurityUtil.decryptRSADefault(pro.get("PRIVATE_KEY").toString(), new String(encrypt,"UTF-8"));

        System.out.println("解密："+decryptRSADefault);

        return RetResponse.makeOKRsp();

    }

    @ResponseBody

    @RequestMapping("/getPulbicKey")

    public String getPublicKey() throws IOException {

        RSA rsa = new RSA();

        //Resource resource = new ClassPathResource("keys/secret_key.txt");

        　　 File file = ResourceUtils.getFile("classpath:keys/secret_key.txt");

        Properties pro = new Properties();//创建集合

        　　 FileOutputStream out = null ;

        try {

            if(!file.exists()) {

                file.createNewFile();

            }

            pro.setProperty(privateKey, rsa.getPrivateKeyBase64());

            pro.setProperty(publicKey, rsa.getPublicKeyBase64());

            out = new FileOutputStream(file);

            pro.store(out,"密钥");

            out.flush();

        } catch (Exception e) {

            log.error("流异常：：：{}", e );

        } finally {

            pro.clear();

            if(out != null ) {

                try {

                    out.close();

                } catch (IOException e) {

                    log.error("流异常",e);

                }

            }

        }

        return rsa.getPublicKeyBase64() ;

    }

}