今天继续实现AOP，到这里我个人认为是最灵活，可扩展的方式了，就拿日志管理来说，用Spring AOP 自定义注解形式实现日志管理。废话不多说，直接开始！！！
关于配置我还是的再说一遍。
在applicationContext-mvc.xml中要添加的
<mvc:annotation-driven />
<!-- 激活组件扫描功能,在包com.gcx及其子包下面自动扫描通过注解配置的组件 -->
<context:component-scan base-package="com.gcx" />
<!-- 启动对@AspectJ注解的支持 -->
<!-- proxy-target-class等于true是强制使用cglib代理，proxy-target-class默认是false，如果你的类实现了接口 就走JDK代理，如果没有，走cglib代理 -->
<!-- 注：对于单利模式建议使用cglib代理，虽然JDK动态代理比cglib代理速度快，但性能不如cglib -->
<!--如果不写proxy-target-class="true"这句话也没问题-->
<aop:aspectj-autoproxy proxy-target-class="true"/>
<!--切面-->
<bean id="systemLogAspect" class="com.gcx.annotation.SystemLogAspect"></bean>
接下来开始编写代码。
创建日志类实体
1 public class SystemLog { 2 private String id; 3 4 private String description; 5 6 private String method; 7 8 private Long logType; 9 10 private String requestIp; 11 12 private String exceptioncode; 13 14 private String exceptionDetail; 15 16 private String params; 17 18 private String createBy; 19 20 private Date createDate; 21 22 public String getId() { 23 return id; 24 } 25 26 public void setId(String id) { 27 this.id = id == null ? null : id.trim(); 28 } 29 30 public String getDescription() { 31 return description; 32 } 33 34 public void setDescription(String description) { 35 this.description = description == null ? null : description.trim(); 36 } 37 38 public String getMethod() { 39 return method; 40 } 41 42 public void setMethod(String method) { 43 this.method = method == null ? null : method.trim(); 44 } 45 46 public Long getLogType() { 47 return logType; 48 } 49 50 public void setLogType(Long logType) { 51 this.logType = logType; 52 } 53 54 public String getRequestIp() { 55 return requestIp; 56 } 57 58 public void setRequestIp(String requestIp) { 59 this.requestIp = requestIp == null ? null : requestIp.trim(); 60 } 61 62 public String getExceptioncode() { 63 return exceptioncode; 64 } 65 66 public void setExceptioncode(String exceptioncode) { 67 this.exceptioncode = exceptioncode == null ? null : exceptioncode.trim(); 68 } 69 70 public String getExceptionDetail() { 71 return exceptionDetail; 72 } 73 74 public void setExceptionDetail(String exceptionDetail) { 75 this.exceptionDetail = exceptionDetail == null ? null : exceptionDetail.trim(); 76 } 77 78 public String getParams() { 79 return params; 80 } 81 82 public void setParams(String params) { 83 this.params = params == null ? null : params.trim(); 84 } 85 86 public String getCreateBy() { 87 return createBy; 88 } 89 90 public void setCreateBy(String createBy) { 91 this.createBy = createBy == null ? null : createBy.trim(); 92 } 93 94 public Date getCreateDate() { 95 return createDate; 96 } 97 98 public void setCreateDate(Date createDate) { 99 this.createDate = createDate;100 }101 }
编写dao接口
1 package com.gcx.dao; 2 3 import com.gcx.entity.SystemLog; 4 5 public interface SystemLogMapper { 6 int deleteByPrimaryKey(String id); 7 8 int insert(SystemLog record); 9 10 int insertSelective(SystemLog record);11 12 SystemLog selectByPrimaryKey(String id);13 14 int updateByPrimaryKeySelective(SystemLog record);15 16 int updateByPrimaryKey(SystemLog record);17 }
编写service层
1 package com.gcx.service; 2 3 import com.gcx.entity.SystemLog; 4 5 public interface SystemLogService { 6 7 int deleteSystemLog(String id); 8 9 int insert(SystemLog record);10 11 int insertTest(SystemLog record);12 13 SystemLog selectSystemLog(String id);14 15 int updateSystemLog(SystemLog record);16 }
编写service实现类serviceImpl
1 package com.gcx.service.impl; 2 3 import javax.annotation.Resource; 4 5 import org.springframework.stereotype.Service; 6 7 import com.gcx.annotation.Log; 8 import com.gcx.dao.SystemLogMapper; 9 import com.gcx.entity.SystemLog;10 import com.gcx.service.SystemLogService;11 12 @Service("systemLogService")13 public class SystemLogServiceImpl implements SystemLogService {14 15 @Resource16 private SystemLogMapper systemLogMapper;17 18 @Override19 public int deleteSystemLog(String id) {20 21 return systemLogMapper.deleteByPrimaryKey(id);22 }23 24 @Override25 26 public int insert(SystemLog record) {27 28 return systemLogMapper.insertSelective(record);29 }30 31 @Override32 public SystemLog selectSystemLog(String id) {33 34 return systemLogMapper.selectByPrimaryKey(id);35 }36 37 @Override38 public int updateSystemLog(SystemLog record) {39 40 return systemLogMapper.updateByPrimaryKeySelective(record);41 }42 43 @Override44 public int insertTest(SystemLog record) {45 46 return systemLogMapper.insert(record);47 }48 49 }
到这里基本程序编写完毕
下面开始自定义注解
1 package com.gcx.annotation; 2 3 import java.lang.annotation.*; 4 5 @Target({ElementType.PARAMETER, ElementType.METHOD}) 6 @Retention(RetentionPolicy.RUNTIME) 7 @Documented 8 public @interface Log { 9 10 /** 要执行的操作类型比如：add操作 **/ 11 public String operationType() default ""; 12 13 /** 要执行的具体操作比如：添加用户 **/ 14 public String operationName() default "";15 }
下面编写切面
1 package com.gcx.annotation; 2 3 import java.lang.reflect.Method; 4 import java.util.Date; 5 import java.util.UUID; 6 7 import javax.annotation.Resource; 8 import javax.servlet.http.HttpServletRequest; 9 import javax.servlet.http.HttpSession; 10 11 import org.aspectj.lang.JoinPoint; 12 import org.aspectj.lang.ProceedingJoinPoint; 13 import org.aspectj.lang.annotation.After; 14 import org.aspectj.lang.annotation.AfterReturning; 15 import org.aspectj.lang.annotation.AfterThrowing; 16 import org.aspectj.lang.annotation.Around; 17 import org.aspectj.lang.annotation.Aspect; 18 import org.aspectj.lang.annotation.Before; 19 import org.aspectj.lang.annotation.Pointcut; 20 import org.slf4j.Logger; 21 import org.slf4j.LoggerFactory; 22 import org.springframework.stereotype.Component; 23 24 import com.gcx.entity.SystemLog; 25 import com.gcx.entity.User; 26 import com.gcx.service.SystemLogService; 27 import com.gcx.util.JsonUtil; 28 29 /** 30 * @author 杨建 31 * @E-mail: email 32 * @version 创建时间：2015-10-19 下午4:29:05 33 * @desc 切点类 34 */ 35 36 @Aspect 37 @Component 38 public class SystemLogAspect { 39 40 //注入Service用于把日志保存数据库 41 @Resource //这里我用resource注解，一般用的是@Autowired，他们的区别如有时间我会在后面的博客中来写 42 private SystemLogService systemLogService; 43 44 private static final Logger logger = LoggerFactory.getLogger(SystemLogAspect. class); 45 46 //Controller层切点 47 @Pointcut("execution (* com.gcx.controller..*.*(..))") 48 public void controllerAspect() { 49 } 50 51 /** 52 * 前置通知 用于拦截Controller层记录用户的操作 53 * 54 * @param joinPoint 切点 55 */ 56 @Before("controllerAspect()") 57 public void doBefore(JoinPoint joinPoint) { 58 System.out.println("==========执行controller前置通知==============="); 59 if(logger.isInfoEnabled()){ 60 logger.info("before " + joinPoint); 61 } 62 } 63 64 //配置controller环绕通知,使用在方法aspect()上注册的切入点 65 @Around("controllerAspect()") 66 public void around(JoinPoint joinPoint){ 67 System.out.println("==========开始执行controller环绕通知==============="); 68 long start = System.currentTimeMillis(); 69 try { 70 ((ProceedingJoinPoint) joinPoint).proceed(); 71 long end = System.currentTimeMillis(); 72 if(logger.isInfoEnabled()){ 73 logger.info("around " + joinPoint + "\tUse time : " + (end - start) + " ms!"); 74 } 75 System.out.println("==========结束执行controller环绕通知==============="); 76 } catch (Throwable e) { 77 long end = System.currentTimeMillis(); 78 if(logger.isInfoEnabled()){ 79 logger.info("around " + joinPoint + "\tUse time : " + (end - start) + " ms with exception : " + e.getMessage()); 80 } 81 } 82 } 83 84 /** 85 * 后置通知 用于拦截Controller层记录用户的操作 86 * 87 * @param joinPoint 切点 88 */ 89 @After("controllerAspect()") 90 public void after(JoinPoint joinPoint) { 91 92 /* HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest(); 93 HttpSession session = request.getSession(); */ 94 //读取session中的用户 95 // User user = (User) session.getAttribute("user"); 96 //请求的IP 97 //String ip = request.getRemoteAddr(); 98 User user = new User(); 99 user.setId(1);100 user.setName("张三");101 String ip = "127.0.0.1";102 try { 103 104 String targetName = joinPoint.getTarget().getClass().getName(); 105 String methodName = joinPoint.getSignature().getName(); 106 Object[] arguments = joinPoint.getArgs(); 107 Class targetClass = Class.forName(targetName); 108 Method[] methods = targetClass.getMethods();109 String operationType = "";110 String operationName = "";111 for (Method method : methods) { 112 if (method.getName().equals(methodName)) { 113 Class[] clazzs = method.getParameterTypes(); 114 if (clazzs.length == arguments.length) { 115 operationType = method.getAnnotation(Log.class).operationType();116 operationName = method.getAnnotation(Log.class).operationName();117 break; 118 } 119 } 120 }121 //*========控制台输出=========*// 122 System.out.println("=====controller后置通知开始====="); 123 System.out.println("请求方法:" + (joinPoint.getTarget().getClass().getName() + "." + joinPoint.getSignature().getName() + "()")+"."+operationType); 124 System.out.println("方法描述:" + operationName); 125 System.out.println("请求人:" + user.getName()); 126 System.out.println("请求IP:" + ip); 127 //*========数据库日志=========*// 128 SystemLog log = new SystemLog(); 129 log.setId(UUID.randomUUID().toString());130 log.setDescription(operationName); 131 log.setMethod((joinPoint.getTarget().getClass().getName() + "." + joinPoint.getSignature().getName() + "()")+"."+operationType); 132 log.setLogType((long)0); 133 log.setRequestIp(ip); 134 log.setExceptioncode( null); 135 log.setExceptionDetail( null); 136 log.setParams( null); 137 log.setCreateBy(user.getName()); 138 log.setCreateDate(new Date()); 139 //保存数据库 140 systemLogService.insert(log); 141 System.out.println("=====controller后置通知结束====="); 142 } catch (Exception e) { 143 //记录本地异常日志 144 logger.error("==后置通知异常=="); 145 logger.error("异常信息:{}", e.getMessage()); 146 } 147 } 148 149 //配置后置返回通知,使用在方法aspect()上注册的切入点150 @AfterReturning("controllerAspect()")151 public void afterReturn(JoinPoint joinPoint){152 System.out.println("=====执行controller后置返回通知====="); 153 if(logger.isInfoEnabled()){154 logger.info("afterReturn " + joinPoint);155 }156 }157 158 /** 159 * 异常通知 用于拦截记录异常日志 160 * 161 * @param joinPoint 162 * @param e 163 */ 164 @AfterThrowing(pointcut = "controllerAspect()", throwing="e") 165 public void doAfterThrowing(JoinPoint joinPoint, Throwable e) { 166 /*HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest(); 167 HttpSession session = request.getSession(); 168 //读取session中的用户 169 User user = (User) session.getAttribute(WebConstants.CURRENT_USER); 170 //获取请求ip 171 String ip = request.getRemoteAddr(); */ 172 //获取用户请求方法的参数并序列化为JSON格式字符串 173 174 User user = new User();175 user.setId(1);176 user.setName("张三");177 String ip = "127.0.0.1";178 179 String params = ""; 180 if (joinPoint.getArgs() != null && joinPoint.getArgs().length > 0) { 181 for ( int i = 0; i < joinPoint.getArgs().length; i++) { 182 params += JsonUtil.getJsonStr(joinPoint.getArgs()[i]) + ";"; 183 } 184 } 185 try { 186 187 String targetName = joinPoint.getTarget().getClass().getName(); 188 String methodName = joinPoint.getSignature().getName(); 189 Object[] arguments = joinPoint.getArgs(); 190 Class targetClass = Class.forName(targetName); 191 Method[] methods = targetClass.getMethods();192 String operationType = "";193 String operationName = "";194 for (Method method : methods) { 195 if (method.getName().equals(methodName)) { 196 Class[] clazzs = method.getParameterTypes(); 197 if (clazzs.length == arguments.length) { 198 operationType = method.getAnnotation(Log.class).operationType();199 operationName = method.getAnnotation(Log.class).operationName();200 break; 201 } 202 } 203 }204 /*========控制台输出=========*/ 205 System.out.println("=====异常通知开始====="); 206 System.out.println("异常代码:" + e.getClass().getName()); 207 System.out.println("异常信息:" + e.getMessage()); 208 System.out.println("异常方法:" + (joinPoint.getTarget().getClass().getName() + "." + joinPoint.getSignature().getName() + "()")+"."+operationType); 209 System.out.println("方法描述:" + operationName); 210 System.out.println("请求人:" + user.getName()); 211 System.out.println("请求IP:" + ip); 212 System.out.println("请求参数:" + params); 213 /*==========数据库日志=========*/ 214 SystemLog log = new SystemLog();215 log.setId(UUID.randomUUID().toString());216 log.setDescription(operationName); 217 log.setExceptioncode(e.getClass().getName()); 218 log.setLogType((long)1); 219 log.setExceptionDetail(e.getMessage()); 220 log.setMethod((joinPoint.getTarget().getClass().getName() + "." + joinPoint.getSignature().getName() + "()")); 221 log.setParams(params); 222 log.setCreateBy(user.getName()); 223 log.setCreateDate(new Date()); 224 log.setRequestIp(ip); 225 //保存数据库 226 systemLogService.insert(log); 227 System.out.println("=====异常通知结束====="); 228 } catch (Exception ex) { 229 //记录本地异常日志 230 logger.error("==异常通知异常=="); 231 logger.error("异常信息:{}", ex.getMessage()); 232 } 233 /*==========记录本地异常日志==========*/ 234 logger.error("异常方法:{}异常代码:{}异常信息:{}参数:{}", joinPoint.getTarget().getClass().getName() + joinPoint.getSignature().getName(), e.getClass().getName(), e.getMessage(), params); 235 236 } 237 238 }
我这里写的比较全，前置通知，环绕通知，后置通知，异常通知，后置饭后通知，都写上了，在我们实际编写中不写全也没事，我习惯上把记录日志的逻辑写在后置通知里面，我看网上也有些在前置通知里面的，但我感觉写在后置通知里比较好。
下面开始在controller中加入自定义的注解！！
1 package com.gcx.controller; 2 3 import org.springframework.beans.factory.annotation.Autowired; 4 import org.springframework.stereotype.Controller; 5 import org.springframework.web.bind.annotation.RequestMapping; 6 7 import com.gcx.annotation.Log; 8 import com.gcx.service.UserService; 9 10 @Controller11 @RequestMapping("userController")12 public class UserController {13 14 @Autowired15 private UserService userService;16 17 @RequestMapping("testAOP")18 @Log(operationType="add操作:",operationName="添加用户") 19 public void testAOP(String userName,String password){ 20 userService.addUser(userName, password);21 }22 }
下面编写测试类
1 @Test2 public void testAOP1(){3 //启动Spring容器 4 ApplicationContext ctx = new ClassPathXmlApplicationContext(new String[]{"classpath:applicationContext-mvc.xml","classpath:applicationContext-dataSource.xml"});5 //获取service或controller组件6 UserController userController = (UserController) ctx.getBean("userController");7 userController.testAOP("zhangsan", "123456");8 }9
数据库数据：
我原本想写两个切点，一个是service层，一个是controller层，service层是用来记录异常信息的日志，而controller层的是用来记录功能的日志，运行结果如下。 
这样做的话不知道在实际的项目中运行效率好不好，在这里请看到博客的大牛给点建议！！