記錄整合springmvc+log4j的的過程

簡介

由於進一步的學習以及便於自己更好的調試程序中遇到的錯誤，開始了將log4j整合到web項目中，項目是基於springmvc的，所以就做了一個springmvc和web項目的整合demo，本篇博客適用於對Maven有一定了解的朋友查看交流，對於初學者，首先我們先將springmvc框架搭建起來，然後再加入Log4j的整合

使用maven創建一個web工程

創建過程就不詳細說了，創建完成後我的項目結構如下

resources下面的log4j.properties暫時可以不創建，是整合log4j需要考慮的

二、首先添加創建springmvc框架時項目依賴的jar包

在pom.xml下面添加

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <spring.version>3.1.2.RELEASE</spring.version>
</properties>


<dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
    </dependency>
</dependencies>

三、創建springmvc-servlet.xml

在WEB-INF下面創建springmvc-servlet.xml添加配置如下

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:p="http://www.springframework.org/schema/p"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
            http://www.springframework.org/schema/beans/spring-beans.xsd
            http://www.springframework.org/schema/mvc
            http://www.springframework.org/schema/mvc/spring-mvc.xsd
            http://www.springframework.org/schema/context
            http://www.springframework.org/schema/context/spring-context.xsd"
       default-lazy-init="true">
    <!--springmvc的註解驅動-->
    <mvc:annotation-driven />
    <!--指定掃描 base-package下面的包-->
    <context:component-scan base-package="com.*"/>

    <!--配置springmvc的viewResolver解析器-->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

四、在web.xml配置中添加如下配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

    <!-- class  DispatcherServlet會自動掃描classpath下面的名字爲<servlet-name>-servlet.xml的配置文件，在這裏，因爲我servlet-name配置
    的是springmvc，所以掃描到的就是springmvc-servlet  -->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!--配置springmvc攔截.do的請求,類似也可以是 / 表示攔截所有的-->
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>

    <!--中文處理過濾，如果不設計中文的處理下面這部分可以移除-->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
  </web-app>

OK，到這裏我們最基本的關於springMVC的配置部分就完成了，接下來創建類

五、創建model類

User.java

package com.model;

/**
 * Created by Nagrand-FatCat on 2015/12/23.
 */

public class User {
    private  String username;
    private  String password;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

六、創建controller類

Helloworld.java

package com.controller;

import com.model.User;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

/**
 * Created by Nagrand-FatCat on 2015/12/23.
 */
@Controller
public class Helloworld {
    //private Logger logger=Logger.getLogger(this.getClass());
    @RequestMapping("index.do")
    public String toIndex(){
        return "index";
    }
    /*
    @RequestMapping("welcome.do")
    public String  welcome(Model model){
        model.addAttribute("res","hello world");
        return  "welcome";
    }
    */

    @RequestMapping("login.do")
    public String login(User user, Model model){
        System.out.println(user.getUsername());
        //logger.info("用戶:" + user.getUsername());
        model.addAttribute("user",user);
        return  "welcome";
    }

}

七、接下來創建頁面

先創建index.jsp

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2015/12/23
  Time: 14:34
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
    String path = request.getContextPath();
// 獲得本項目的地址(例如: http://localhost:8080/MyApp/)賦值給basePath變量
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
// 將 "項目路徑basePath" 放入pageContext中，待以後用EL表達式讀出。
    pageContext.setAttribute("basePath",basePath);
%>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <form action="login.do" method="post">
        用戶名 :<input type="text" name="username" >
        密碼   :<input type="password" name="password">
        <input type="submit" value="登陸">
    </form>
</body>
</html>

然後是welcome.jsp

<%--
  Created by IntelliJ IDEA.
  User: Administrator
  Date: 2015/12/23
  Time: 14:34
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%
    String path = request.getContextPath();
// 獲得本項目的地址(例如: http://localhost:8080/MyApp/)賦值給basePath變量
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
// 將 "項目路徑basePath" 放入pageContext中，待以後用EL表達式讀出。
    pageContext.setAttribute("basePath",basePath);
%>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <p>Welcome ,</p>
    <p> ${user.getUsername()} 用戶</p>
</body>
</html>

將項目部署到服務器上，完成創建，跑一下試試，springmvc框架就搭建完成了

八、接下來我們將log4j加入到項目裏

在resources/prop 下創建log4j.properties文件
內容如下：

### set log levels ###
log4j.rootLogger = debug,stdout,D,E

log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n

log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = E://logs/log.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = DEBUG
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File =E://logs/error.log
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

然後再web.xml中添加以下配置

<!--設置log4j的配置文件位置-->
<context-param>
    <param-name>log4jConfigLocation</param-name>
    <param-value>/WEB-INF/classes/prop/log4j.properties</param-value>
</context-param>
<!--使用監聽加載log4j的配置文件-->
<listener>
    <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>

最後將上面我在controller層下的Helloworld.java類中的 單行註釋 都去掉，因爲這部分是關於log4j的。然後就可以使用了，很簡單吧

跑一下，控制檯會輸出日誌文件的信息，E：//logs/log下面也生成了日誌文件，用日誌記錄程序運行的過程對我們調BUG有很多幫助呢