跨域

       浏览器的同源策略限制了一个源（origin）中加载文本或脚本与来自其它源（origin）中资源的交互方式。如果两个页面的协议（protocol）、端口（如果指定）、和主机任一不相同，则他们就不是同源的，在他们之间进行请求则认为是跨域。

如何解决

     跨域的解决方案主要有JSONP、改变domain、CORS等等，因为项目适用于使用CORS，这里只讨论CORS。

服务端处理

response.addHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "POST,GET,DELETE,PUT");
response.setHeader("Access-Control-Allow-Headers", "accept,content-type,cache-control,if-modified-since,pragma,x-requested-with");

   Access-Control-Allow-Headers部分可通过chrome调试查看页面发送的信息修改。

   如果是用spring框架的话可继承WebMvcConfigurerAdapter，添加HandlerInterceptor，在自定义HandlerInterceptor里面添加处理即可。

   angularjs会首先发送一个OPTIONS请求，其次才会真正请求数据，具体原理查看最后的引用链接。

spring JSONP支持

 

	/*** <p>http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#mvc-ann-jsonp</p>* <p>spring4.1.0 later</p>* @author whua**/@ControllerAdvicepublic static class JsonpCallbackAdvice extends AbstractJsonpResponseBodyAdvice {public JsonpCallbackAdvice(){super("callback");}}

angularjs处理

   

angular.module('MyModule', [], function($httpProvider) {// Use x-www-form-urlencoded Content-Type$httpProvider.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded;charset=utf-8';/*** The workhorse; converts an object to x-www-form-urlencoded serialization.* @param {Object} obj* @return {String}*/ var param = function(obj) {var query = '', name, value, fullSubName, subName, subValue, innerObj, i;for(name in obj) {value = obj[name];if(value instanceof Array) {for(i=0; i<value.length; ++i) {subValue = value[i];fullSubName = name + '[' + i + ']';innerObj = {};innerObj[fullSubName] = subValue;query += param(innerObj) + '&';}}else if(value instanceof Object) {for(subName in value) {subValue = value[subName];fullSubName = name + '[' + subName + ']';innerObj = {};innerObj[fullSubName] = subValue;query += param(innerObj) + '&';}}else if(value !== undefined && value !== null)query += encodeURIComponent(name) + '=' + encodeURIComponent(value) + '&';}return query.length ? query.substr(0, query.length - 1) : query;};// Override $http service's default transformRequest$httpProvider.defaults.transformRequest = [function(data) {return angular.isObject(data) && String(data) !== '[object File]' ? param(data) : data;}];
});

参考

1. http://www.cnblogs.com/y896926473/p/5754287.html

2. http://blog.csdn.net/jiang0946316/article/details/53645396

3.http://victorblog.com/2012/12/20/make-angularjs-http-service-behave-like-jquery-ajax/

myTestCase

import java.lang.reflect.Method;
import java.sql.Timestamp;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.log4j.LogManager;
import org.apache.log4j.Logger;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.ApplicationListener;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.context.event.ContextRefreshedEvent;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.transaction.support.DefaultTransactionDefinition;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.mvc.method.annotation.AbstractJsonpResponseBodyAdvice;import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;//
/*** * @author wangh* */
@Service
@EnableAutoConfiguration
@Configuration
public class ItfMonitor extends WebMvcConfigurerAdapter implements ApplicationListener<ContextRefreshedEvent> {public static final Logger log = LogManager.getLogger(ItfMonitor.class);@Autowiredpublic JdbcTemplate jdbcTemplate;@Autowiredpublic ExecutorService executorService;@Autowiredpublic RegHandler regHandler;@Beanpublic ExecutorService configPools() {return Executors.newFixedThreadPool(10);}@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(regHandler).addPathPatterns("/**");}public static class SingletonCls{private static int obj = -1;public static int getObj(){synchronized (SingletonCls.class) {obj += 1;	}return obj;}}@Transactional@Overridepublic void onApplicationEvent(ContextRefreshedEvent event) {if(SingletonCls.getObj() > 0 ){return;}try {//add flow column} catch (Exception ex) {if (log.isInfoEnabled()) {}System.out.println("服务启动完毕！！！");}}@Scope("prototype")@Componentpublic static class RegHandler implements HandlerInterceptor, Runnable {public RegHandler() {}@Autowiredpublic JdbcTemplate jdbcTemplate;@Autowiredpublic ExecutorService executorService;@AutowiredPlatformTransactionManager transactionManager;HandlerMethod hm;Map<String, String[]> reqPms;public RegHandler(JdbcTemplate jdbcTemplate, ExecutorService executorService) {this.jdbcTemplate = jdbcTemplate;this.executorService = executorService;}@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {//添加跨域处理response.addHeader("Access-Control-Allow-Origin", "*");response.setHeader("Access-Control-Allow-Methods", "POST,GET,DELETE,PUT");response.setHeader("Access-Control-Allow-Headers", "accept,content-type,cache-control,if-modified-since,pragma,x-requested-with");if (handler instanceof HandlerMethod) {this.hm = (HandlerMethod) handler;this.reqPms = request.getParameterMap();executorService.submit(this);}log.info(request.getRequestURI());return true;}@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {// TODO Auto-generated method stub}@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {}@Overridepublic void run() {TransactionStatus status = transactionManager.getTransaction(new DefaultTransactionDefinition());try {//todotransactionManager.commit(status);return;} catch (Exception e) {transactionManager.rollback(status);e.printStackTrace();return;}}}@Transactional@RestController@RequestMapping("/ItfMonitor")public static class ItfRestCtr {@Autowiredpublic JdbcTemplate jdbcTemplate;@RequestMapping("/getItfDetail")public Object getItfDetail(String cnname, String enname, String servicename, int hitnum) {final String sql = "select * from t_itfmonitor_detail where cnname =? and enname =? and servicename = ? and hitnum=?";return jdbcTemplate.queryForList(sql, cnname, enname, servicename, hitnum);}}/*** <p>http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#mvc-ann-jsonp</p>* <p>spring4.1.0 later</p>* @author whua**/@ControllerAdvicepublic static class JsonpCallbackAdvice extends AbstractJsonpResponseBodyAdvice {public JsonpCallbackAdvice(){super("callback");}}}