配置文件整理

時間 2019-11-05

標籤配置文件整理简体版

原文原文鏈接

spring_mvc配置javascript

所需jar包：html

commons-logging-1.1.3.jarjava

spring-aop-4.1.6.RELEASE.jarjquery

spring-beans-4.1.6.RELEASE.jarweb

spring-context-4.1.6.RELEASE.jarajax

spring-context-support-4.1.6.RELEASE.jarspring

spring-core-4.1.6.RELEASE.jarexpress

spring-expression-4.1.6.RELEASE.jarjson

spring-web-4.1.6.RELEASE.jarapi

spring-webmvc-4.1.6.RELEASE.jar

web.xml(myeclise path:/projectname/WebRoot/WEB-INF/web.xml)

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">

	<!-- 配置spring_mvc -->
	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--改變springmvc配置文件默認位置-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:mvc.xml</param-value>
        </init-param>
		<!-- 加載順序，數值越大越日後 -->
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>*.do</url-pattern>
	</servlet-mapping>
</web-app>

註解方式：

mvc.xml(默認命名規則爲：默認在WEB-INF下添加[DispatcherServletName]-servlet.xml，servlet中配置contextConfigLocation後可改變其路徑)

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

	<!-- 配置渲染器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!-- 結果視圖的前綴 -->
		<property name="prefix" value="/WEB-INF/jsp/"/>
		<!-- 結果視圖的後綴 -->
		<property name="suffix" value=".jsp"/>
	</bean>
	<!-- 掃描該包下的註解 -->
	<context:component-scan base-package="com.springmvc.controller"></context:component-scan>
</beans>

編寫Controller

package com.springmvc.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

@Controller
public class HelloController {

	@RequestMapping("/hello")
	public ModelAndView handlerRequest(HttpServletRequest req,
			HttpServletResponse resp) throws Exception{
		ModelAndView mv = new ModelAndView();
		mv.addObject("msg", "hello springmvc_annotation!");
		mv.setViewName("hello");
		return mv;
	}
}

配置文件方式：

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

	<!-- 配置HandlerMapping -->
	<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
	<!-- 配置HandlerAdapter -->
	<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean>
	<!-- 配置渲染器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!-- 結果視圖的前綴 -->
		<property name="prefix" value="/WEB-INF/jsp/"/>
		<!-- 結果視圖的後綴 -->
		<property name="suffix" value=".jsp"/>
	</bean>
	<!-- 配置請求和處理器 -->
	<bean name="/hello.do" class="com.springmvc.controller.HelloController"></bean>
</beans>

controller的4種配置方式：

<?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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">

	<!-- 1.該配置方位/hello.do時就會尋找name爲hello.do的bean -->
	<!--  配置HandlerMapping
	<bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"></bean>
	配置HandlerAdapter
	<bean class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter"></bean> -->
	
	<!-- 2.該類配置，訪問/hello.do時，spring會把請求分配helloController進行處理 -->
	<!-- <bean class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="mappings">
			<props>
				key對應url請求名，value對應處理器id
				<prop key="/hello.do">helloController</prop>
			</props>
		</property>
	</bean>
	配置請求和處理器
	<bean id="helloController" class="com.springmvc.controller.HelloController"></bean> -->
	
	<!-- 3.url匹配bean,請求爲hello*.do都將被匹配，根據controller類開頭去匹配 -->
	<bean class="org.springframework.web.servlet.mvc.support.ControllerClassNameHandlerMapping"></bean>
	<!-- 配置請求和處理器 -->
	<bean id="helloController" class="com.springmvc.controller.HelloController"></bean>
	
	<!-- 4.註解 -->
	<!-- <context:component-scan base-package="com.springmvc.controller"></context:component-scan> -->
	
	<!-- 配置渲染器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!-- 結果視圖的前綴 -->
		<property name="prefix" value="/WEB-INF/jsp/"/>
		<!-- 結果視圖的後綴 -->
		<property name="suffix" value=".jsp"/>
	</bean>
</beans>

result的4種跳轉方式：

1. 設置ModelAndView對象。根據View的名稱和視圖解析器跳轉到指定的頁面。

頁面：視圖解析器的前綴+view name+視圖解析器的後綴

<!-- 配置渲染器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!-- 結果視圖的前綴 -->
		<property name="prefix" value="/WEB-INF/jsp/"/>
		<!-- 結果視圖的後綴 -->
		<property name="suffix" value=".jsp"/>
	</bean>

2. 經過ServletAPI對象來實現。該方式不須要配置視圖解析器。

經過HttpServletResponse來進行輸出

@Controller
public class HelloController {
	@RequestMapping("/hello")
	public void hello(HttpServletResponse resp) throws IOException {
		resp.getWriter().println("hello springmvc use httpservlet api");
	}
}

經過HttpServletResponse來重定向

@Controller
public class HelloController {
	@RequestMapping("/hello")
	public void hello(HttpServletRequest req, HttpServletResponse resp) throws IOException {
		// 重定向
		System.out.println(req.getContextPath());
		resp.sendRedirect(req.getContextPath()+"/index.jsp");
	}
}

經過HttpServletRequest實現轉發

@Controller
public class HelloController {
	@RequestMapping("/hello")
	public void hello(HttpServletRequest req, HttpServletResponse resp) throws IOException, ServletException {
		// 轉發
		req.setAttribute("msg", "servlet api forward");
		req.getRequestDispatcher("/index.jsp").forward(req, resp);
	}
}

3.經過springmvc來實現轉發和重定向。——沒有視圖解析器

轉發實現方式1

@Controller
public class SpringmvcController {
	@RequestMapping("/hello1")
	public String hello() {
		// 轉發1
		return "hello1.jsp";
	}
}

轉發實現方式2

@Controller
public class SpringmvcController {
	@RequestMapping("/hello1")
	public String hello() {
		// 轉發2
		System.out.println("轉發2");
		return "forward:hello1.jsp";
	}
}

重定向實現

@Controller
public class SpringmvcController {
	@RequestMapping("/hello1")
	public String hello() {
		// 重定向
		return "redirect:hello1.jsp";
	}
}

4. 經過springmvc來實現轉發和重定向。——有視圖解析器

轉發實現

@Controller
public class SpringmvcController2 {
	@RequestMapping("/hello2")
	public String hello() {
		// 轉發
		return "hello2";
	}
}

重定向實現

注意：重定向視圖解析無效，因此只能重定向到另外一個請求。

@Controller
public class SpringmvcController2 {
	@RequestMapping("/hello2")
	public String hello() {
		// 轉發
		//return "hello2";
		// 重定向
		return "redirect:hello1.do";
	}
}

文件上傳

所需jar包：

commons-fileupload-1.3.2.jar

commons-io-2.2.jar

1. 配置文件上傳解析器：

<!-- 文件上傳解析器 -->
	<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
		<property name="defaultEncoding" value="utf-8"></property>
		<!-- 最大文件上傳大小 -->
    	<property name="maxUploadSize" value="104857600"/>
    	<!-- 緩存大小 -->
    	<property name="maxInMemorySize" value="40960"></property>
	</bean>

2. jsp頁面

<form action="upload.do" method="post" enctype="multipart/form-data">
    	文件：<input type="file" name="file" /><input type="submit" value="上傳" />
    </form>

3. controller

@Controller
public class FileuploadController {
	@RequestMapping("/upload")
	public String fileupload(@RequestParam("file")CommonsMultipartFile file, HttpServletRequest req) throws IOException {
		// 獲取文件名
		System.out.println(file.getOriginalFilename());
		// 獲取上傳文件的路徑
		String path = req.getRealPath("/fileupload");
		InputStream is = file.getInputStream();
		OutputStream os = new FileOutputStream(new File(path, file.getOriginalFilename()));
		int len = 0;
		byte[] buffer = new byte[400];
		while((len = is.read(buffer)) != -1) {
			os.write(buffer, 0, len);
		}
		os.close();
		is.close();
		return "/index.jsp";
	}
}

ajax處理

使用HttpServletResponse

controoller

@Controller
public class AjaxController {
	@RequestMapping("/ajax")
	public void ajax(String name, HttpServletResponse resp) throws IOException {
		resp.setCharacterEncoding("utf-8");
		if("bjsxt".equals(name)) {
			resp.getWriter().print("用戶名已存在！");
		}else {
			resp.getWriter().print("無人使用，能夠註冊！");
		}
	}
}

jsp

<script type="text/javascript" src="js/jquery-3.0.0.min.js"></script>
	<script type="text/javascript">
		$(function() {
			$("#txtName").blur(function() {
				$.post("ajax.do", {
					'name':$("#txtName").val()
				}, function(data) {
					$("#txtSpan").text(data);
				});
			})
		});
	</script>
  </head>
  
  <body>
    用戶名：<input type="text" id="txtName" />&nbsp;<span id="txtSpan"></span>
  </body>

json處理

所需jar包：

jackson-annotations-2.5.4.jar

jackson-core-2.5.4.jar

jackson-databind-2.5.4.jar

配置json轉換器

mvc.xml

<!-- 用於將對象轉換爲JSON -->
	<bean id="messageConverter" class="org.springframework.http.converter.StringHttpMessageConverter">
		<property name="supportedMediaTypes">
			<list>
				<value>text/plain;charset=UTF-8</value>
			</list>
		</property>
	</bean>
	<bean id="jsonConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"></bean>
	<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
		<property name="messageConverters">
			<list>
				<ref bean="messageConverter"/>
				<ref bean="jsonConverter"/>
			</list>
		</property>
	</bean>

controller

@Controller
public class JsonController {
	@RequestMapping("/json")
	@ResponseBody
	public List<User> json() {
		List<User> list = new ArrayList<User>();
		list.add(new User(1, "張三", "111"));
		list.add(new User(2, "李四", "222"));
		list.add(new User(3, "王五", "333"));
		return list;
	}
}

jsp

<script type="text/javascript">
		$(function() {
			$("#btn").click(function() {
				$.post("json.do", function(data){
					//console.info(data);
					var html = "";
					for(var i=0; i<data.length;i++) {
						html += "<tr><td>" + data[i].id + "</td><td>"+data[i].name+"</td><td>"+data[i].pwd+"</td></tr>"
					}
					$("#content").html(html);
				});
			});
		});
	</script>
  </head>
  
  <body>
  	<input id="btn" type="button" value="獲取json數據" />
    <table width="80%" align="center">
    	<tr>
    		<td>編號</td>
    		<td>姓名</td>
    		<td>密碼</td>
    	</tr>
    	<tbody id="content"></tbody>
    </table>
  </body>

亂碼解決

post亂碼，經過過濾器來解決

<filter>
  	<filter-name>characterEncodingFilter</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>
  </filter>
  <filter-mapping>
  	<filter-name>characterEncodingFilter</filter-name>
  	<url-pattern>*.do</url-pattern>
  </filter-mapping>

get亂碼，則需修改tomcat配置文件解決。

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