SpringMvc 相关,bean map转换,百度天气,base64.js,jsBase64.java;
1. Map<String, Object>与JavaBean[POJO, Model]转换;
//model public 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(); }
2. 查询百度天气:
@RequestMapping(value = "/weather", method = RequestMethod.GET) @ResponseBody public 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(); }
JsBase64.java
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 = 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 == 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 == 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); } }
前端调用:
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); } } }); }
base64.js:
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; }
