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 @Resource
16 private SystemLogMapper systemLogMapper;
17
18 @Override
19 public int deleteSystemLog(String id) {
20
21 return systemLogMapper.deleteByPrimaryKey(id);
22 }
23
24 @Override
25
26 public int insert(SystemLog record) {
27
28 return systemLogMapper.insertSelective(record);
29 }
30
31 @Override
32 public SystemLog selectSystemLog(String id) {
33
34 return systemLogMapper.selectByPrimaryKey(id);
35 }
36
37 @Override
38 public int updateSystemLog(SystemLog record) {
39
40 return systemLogMapper.updateByPrimaryKeySelective(record);
41 }
42
43 @Override
44 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 @Controller
11 @RequestMapping("userController")
12 public class UserController {
13
14 @Autowired
15 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 @Test
2 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！！