//modelpublic class model{    private int id;    private String name;    private Date dateNow;    public int getId() {        return this.id;    }    public void setId(int id) {        this.id = id;    }    //..}import org.apache.commons.beanutils.BeanUtils;import java.util.Date;//Map<String, Object>;Map<String, Object> map = new HashMap<String, Object>();map.put("id", "idxxxxxx");map.put("name", "name");map.put("dateNow", new Date());try {    BeanUtils.populate(model, map);} catch (IllegalAccessException e) {    // TODO Auto-generated catch block    e.printStackTrace();} catch (InvocationTargetException e) {    // TODO Auto-generated catch block    e.printStackTrace();}

@RequestMapping(value = "http://www.mamicode.com/weather", method = RequestMethod.GET)@ResponseBodypublic String getWeather(HttpServletRequest request) throws Exception {        //百度天气API                String cityName = JsBase64.decode(request.getParameter("city"), "Unicode");        String baiduUrl = "http://api.map.baidu.com/telematics/v3/weather?location="+cityName+"&output=json&ak=DjKh3SLaEXaLMVCaaqaMaG2d";        StringBuffer strBuf;        try {                                                                   baiduUrl = "http://api.map.baidu.com/telematics/v3/weather?location="+URLEncoder.encode(cityName, "utf-8")+"&output=json&ak=DjKh3SLaEXaLMVCaaqaMaG2d";                            } catch (UnsupportedEncodingException e1) {                            e1.printStackTrace();                            }        strBuf = new StringBuffer();                    try{            URL url = new URL(baiduUrl);            URLConnection conn = url.openConnection();            BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream(),"utf-8"));//转码。            String line = null;            while ((line = reader.readLine()) != null)                strBuf.append(line + " ");                reader.close();        }catch(MalformedURLException e) {            e.printStackTrace();         }catch(IOException e){            e.printStackTrace();         }            return strBuf.toString();}

package utils;public class JsBase64 {    private static final byte[] encodingTable = {    (byte) ‘A‘, (byte) ‘B‘, (byte) ‘C‘, (byte) ‘D‘, (byte) ‘E‘,    (byte) ‘F‘, (byte) ‘G‘, (byte) ‘H‘, (byte) ‘I‘, (byte) ‘J‘,    (byte) ‘K‘, (byte) ‘L‘, (byte) ‘M‘, (byte) ‘N‘, (byte) ‘O‘,    (byte) ‘P‘, (byte) ‘Q‘, (byte) ‘R‘, (byte) ‘S‘, (byte) ‘T‘,    (byte) ‘U‘, (byte) ‘V‘, (byte) ‘W‘, (byte) ‘X‘, (byte) ‘Y‘,    (byte) ‘Z‘, (byte) ‘a‘, (byte) ‘b‘, (byte) ‘c‘, (byte) ‘d‘,    (byte) ‘e‘, (byte) ‘f‘, (byte) ‘g‘, (byte) ‘h‘, (byte) ‘i‘,    (byte) ‘j‘, (byte) ‘k‘, (byte) ‘l‘, (byte) ‘m‘, (byte) ‘n‘,    (byte) ‘o‘, (byte) ‘p‘, (byte) ‘q‘, (byte) ‘r‘, (byte) ‘s‘,    (byte) ‘t‘, (byte) ‘u‘, (byte) ‘v‘, (byte) ‘w‘, (byte) ‘x‘,    (byte) ‘y‘, (byte) ‘z‘, (byte) ‘0‘, (byte) ‘1‘, (byte) ‘2‘,    (byte) ‘3‘, (byte) ‘4‘, (byte) ‘5‘, (byte) ‘6‘, (byte) ‘7‘,    (byte) ‘8‘, (byte) ‘9‘, (byte) ‘+‘, (byte) ‘/‘    };    private static final byte[] decodingTable;    static {        decodingTable = new byte[128];        for (int i = 0; i < 128; i++) {            decodingTable[i] = (byte) -1;        }        for (int i = ‘A‘; i <= ‘Z‘; i++) {            decodingTable[i] = (byte) (i - ‘A‘);        }        for (int i = ‘a‘; i <= ‘z‘; i++) {            decodingTable[i] = (byte) (i - ‘a‘ + 26);        }        for (int i = ‘0‘; i <= ‘9‘; i++) {            decodingTable[i] = (byte) (i - ‘0‘ + 52);        }        decodingTable[‘+‘] = 62;        decodingTable[‘/‘] = 63;    }    public static byte[] encode(byte[] data, int offset) {        byte[] bytes;        int realCount = data.length - offset;        int modulus = realCount % 3;        if (modulus == 0) {            bytes = new byte[(4 * realCount) / 3];        } else {            bytes = new byte[4 * ((realCount / 3) + 1)];        }        int dataLength = (data.length - modulus);        int a1;        int a2;        int a3;        for (int i = offset, j = 0; i < dataLength; i += 3, j += 4) {            a1 = data[i] & 0xff;            a2 = data[i + 1] & 0xff;            a3 = data[i + 2] & 0xff;            bytes[j] = encodingTable[(a1 >>> 2) & 0x3f];            bytes[j + 1] = encodingTable[((a1 << 4) | (a2 >>> 4)) & 0x3f];            bytes[j + 2] = encodingTable[((a2 << 2) | (a3 >>> 6)) & 0x3f];            bytes[j + 3] = encodingTable[a3 & 0x3f];        }        int b1;        int b2;        int b3;        int d1;        int d2;        switch (modulus) {        case 0: /* nothing left to do */            break;        case 1:            d1 = data[data.length - 1] & 0xff;            b1 = (d1 >>> 2) & 0x3f;            b2 = (d1 << 4) & 0x3f;            bytes[bytes.length - 4] = encodingTable[b1];            bytes[bytes.length - 3] = encodingTable[b2];            bytes[bytes.length - 2] = (byte) ‘=‘;            bytes[bytes.length - 1] = (byte) ‘=‘;            break;        case 2:            d1 = data[data.length - 2] & 0xff;            d2 = data[data.length - 1] & 0xff;            b1 = (d1 >>> 2) & 0x3f;            b2 = ((d1 << 4) | (d2 >>> 4)) & 0x3f;            b3 = (d2 << 2) & 0x3f;            bytes[bytes.length - 4] = encodingTable[b1];            bytes[bytes.length - 3] = encodingTable[b2];            bytes[bytes.length - 2] = encodingTable[b3];            bytes[bytes.length - 1] = (byte) ‘=‘;            break;        }        return bytes;    }    public static byte[] decode(byte[] data) {        byte[] bytes;        byte b1;        byte b2;        byte b3;        byte b4;        data = discardNonBase64Bytes(data);        if (data[data.length - 2] == ‘=‘) {            bytes = new byte[(((data.length / 4) - 1) * 3) + 1];        } else if (data[data.length - 1] == ‘=‘) {            bytes = new byte[(((data.length / 4) - 1) * 3) + 2];        } else {            bytes = new byte[((data.length / 4) * 3)];        }        for (int i = 0, j = 0; i < (data.length - 4); i += 4, j += 3) {            b1 = decodingTable[data[i]];            b2 = decodingTable[data[i + 1]];            b3 = decodingTable[data[i + 2]];            b4 = decodingTable[data[i + 3]];            bytes[j] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[j + 1] = (byte) ((b2 << 4) | (b3 >> 2));            bytes[j + 2] = (byte) ((b3 << 6) | b4);        }        if (data[data.length - 2] == ‘=‘) {            b1 = decodingTable[data[data.length - 4]];            b2 = decodingTable[data[data.length - 3]];            bytes[bytes.length - 1] = (byte) ((b1 << 2) | (b2 >> 4));        } else if (data[data.length - 1] == ‘=‘) {            b1 = decodingTable[data[data.length - 4]];            b2 = decodingTable[data[data.length - 3]];            b3 = decodingTable[data[data.length - 2]];            bytes[bytes.length - 2] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[bytes.length - 1] = (byte) ((b2 << 4) | (b3 >> 2));        } else {            b1 = decodingTable[data[data.length - 4]];            b2 = decodingTable[data[data.length - 3]];            b3 = decodingTable[data[data.length - 2]];            b4 = decodingTable[data[data.length - 1]];            bytes[bytes.length - 3] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[bytes.length - 2] = (byte) ((b2 << 4) | (b3 >> 2));            bytes[bytes.length - 1] = (byte) ((b3 << 6) | b4);        }        return bytes;    }    public static byte[] decode(String data) {        byte[] bytes;        byte b1;        byte b2;        byte b3;        byte b4;        data = discardNonBase64Chars(data);        if (data.charAt(data.length() - 2) == ‘=‘) {            bytes = new byte[(((data.length() / 4) - 1) * 3) + 1];        } else if (data.charAt(data.length() - 1) == ‘=‘) {            bytes = new byte[(((data.length() / 4) - 1) * 3) + 2];        } else {            bytes = new byte[((data.length() / 4) * 3)];        }        for (int i = 0, j = 0; i < (data.length() - 4); i += 4, j += 3) {            b1 = decodingTable[data.charAt(i)];            b2 = decodingTable[data.charAt(i + 1)];            b3 = decodingTable[data.charAt(i + 2)];            b4 = decodingTable[data.charAt(i + 3)];            bytes[j] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[j + 1] = (byte) ((b2 << 4) | (b3 >> 2));            bytes[j + 2] = (byte) ((b3 << 6) | b4);        }        if (data.charAt(data.length() - 2) == ‘=‘) {            b1 = decodingTable[data.charAt(data.length() - 4)];            b2 = decodingTable[data.charAt(data.length() - 3)];            bytes[bytes.length - 1] = (byte) ((b1 << 2) | (b2 >> 4));        } else if (data.charAt(data.length() - 1) == ‘=‘) {            b1 = decodingTable[data.charAt(data.length() - 4)];            b2 = decodingTable[data.charAt(data.length() - 3)];            b3 = decodingTable[data.charAt(data.length() - 2)];            bytes[bytes.length - 2] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[bytes.length - 1] = (byte) ((b2 << 4) | (b3 >> 2));        } else {            b1 = decodingTable[data.charAt(data.length() - 4)];            b2 = decodingTable[data.charAt(data.length() - 3)];            b3 = decodingTable[data.charAt(data.length() - 2)];            b4 = decodingTable[data.charAt(data.length() - 1)];            bytes[bytes.length - 3] = (byte) ((b1 << 2) | (b2 >> 4));            bytes[bytes.length - 2] = (byte) ((b2 << 4) | (b3 >> 2));            bytes[bytes.length - 1] = (byte) ((b3 << 6) | b4);        }        for (int i = 0; i < bytes.length; i++)            System.out.println("," + bytes[i]);        return bytes;    }    private static byte[] discardNonBase64Bytes(byte[] data) {        byte[] temp = new byte[data.length];        int bytesCopied = 0;        for (int i = 0; i < data.length; i++) {            if (isValidBase64Byte(data[i])) {                temp[bytesCopied++] = data[i];            }        }        byte[] newData = http://www.mamicode.com/new byte[bytesCopied];        System.arraycopy(temp, 0, newData, 0, bytesCopied);        return newData;    }    private static String discardNonBase64Chars(String data) {        StringBuffer sb = new StringBuffer();        int length = data.length();        for (int i = 0; i < length; i++) {            if (isValidBase64Byte((byte) (data.charAt(i)))) {                sb.append(data.charAt(i));            }        }        return sb.toString();    }    private static boolean isValidBase64Byte(byte b) {        if (b == ‘=‘) {            return true;        } else if ((b < 0) || (b >= 128)) {            return false;        } else if (decodingTable[b] == -1) {            return false;        }        return true;    }    public static String encode(String data, String charset) throws Exception    {        // byte[] result = (data.getBytes("Unicode"));        if (data =http://www.mamicode.com/= null || data.length() == 0)            return data;        int offset = 0;        // getBytes("unicode")转完后会在前头加上两字节”FE“        byte[] result = encode(data.getBytes(charset), offset);        StringBuffer sb = new StringBuffer(result.length);        for (int i = 0; i < result.length; i++)            sb.append((char) result[i]);        return sb.toString();    }    public static String decode(String data, String charset) throws Exception    {        if (data =http://www.mamicode.com/= null || data.length() == 0)            return data;        return new String(JsBase64.decode(data), charset);    }    public static void main(String[] args) throws Exception {        String data = "我们";        String data1 = encode(data, "Unicode");        String data2 = decode(data1, "Unicode");        System.out.println(data);        System.out.println(data1);        System.out.println(data2);    }}

function getWeather(city) {    console.log(city);    console.log(escape(city));    $.ajax({        type:‘GET‘,        dataType : ‘json‘,        url : ‘/xxxx/weather.do?city=‘+encode64(city)+‘&e=‘+Math.random(), //‘http://api.map.baidu.com/telematics/v3/weather?location=‘+city+‘&output=json&ak=DjKh3SLaEXaLMVCaaqaMaG2d&jscallback=?‘,        success:function(data) {            console.log(data);            if (data.results) {                var todays = data.results[0].weather_data[0];                var pm25 = data.results[0].pm25;                                if (todays) {                    var weather = todays.weather;                    var temperature = todays.temperature;                }                                $(‘#clcx_div .weather‘).html(weather + ‘ ‘ + temperature + ‘ 空气质量: ‘ + pm25);            }        }    });}

var keyStr = "ABCDEFGHIJKLMNOP" +"QRSTUVWXYZabcdef" +"ghijklmnopqrstuv" +"wxyz0123456789+/" +"=";function encode64(input) {    input = unicodetoBytes(input);    var output = "";    var chr1, chr2, chr3 = "";    var enc1, enc2, enc3, enc4 = "";    var i = 0;    do {        chr1 = input[i++];        chr2 = input[i++];        chr3 = input[i++];        enc1 = chr1 >> 2;        enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);        enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);        enc4 = chr3 & 63;        if (isNaN(chr2)) {            enc3 = enc4 = 64;        } else if (isNaN(chr3)) {            enc4 = 64;        }        output = output +        keyStr.charAt(enc1) +        keyStr.charAt(enc2) +        keyStr.charAt(enc3) +        keyStr.charAt(enc4);        chr1 = chr2 = chr3 = "";        enc1 = enc2 = enc3 = enc4 = "";    } while (i < input.length);    return output;}function decode64(input) {    var output = "";    var chr1, chr2, chr3 = "";    var enc1, enc2, enc3, enc4 = "";    var i = 0;    // remove all characters that are not A-Z, a-z, 0-9, +, /, or =    var base64test = /[^A-Za-z0-9\+\/\=]/g;    if (base64test.exec(input)) {        alert("There were invalid base64 characters in the input text.\n" +        "Valid base64 characters are A-Z, a-z, 0-9, ‘+‘, ‘/‘, and ‘=‘\n" +        "Expect errors in decoding.");    }    input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");    output = new Array();    do {        enc1 = keyStr.indexOf(input.charAt(i++));        enc2 = keyStr.indexOf(input.charAt(i++));        enc3 = keyStr.indexOf(input.charAt(i++));        enc4 = keyStr.indexOf(input.charAt(i++));        chr1 = (enc1 << 2) | (enc2 >> 4);        chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);        chr3 = ((enc3 & 3) << 6) | enc4;        output.push(chr1);        if (enc3 != 64) {            output.push(chr2);        }        if (enc4 != 64) {            output.push(chr3);        }        chr1 = chr2 = chr3 = "";        enc1 = enc2 = enc3 = enc4 = "";    } while (i < input.length);    return bytesToUnicode(output);}function unicodetoBytes(s){    var result = new Array();    if (s == null || s == "")        return result;    result.push(255); // add "FE" to head    result.push(254);    for ( var i = 0; i < s.length; i++)    {        var c = s.charCodeAt(i).toString(16);        if (c.length == 1)            i = "000" + c;        else if (c.length == 2)            c = "00" + c;        else if (c.length == 3)            c = "0" + c;        var var1 = parseInt(c.substring(2), 16);        var var2 = parseInt(c.substring(0, 2), 16);        result.push(var1);        result.push(var2);    }    return result;}function bytesToUnicode(bs){    var result = "";    var offset = 0;    if (bs.length >= 2 && bs[0] == 255 && bs[1] == 254)        offset = 2; // delete "FE"    for ( var i = offset; i < bs.length; i += 2)    {        var code = bs[i] + (bs[i + 1] << 8);        result += String.fromCharCode(code);    }    return result;}