今天看一个SpringMVC的项目,然后编写接口,并通过前台的ajax调用来访问接口,当然这所有的一切好像都没有什么问题,你看下面是我们的ajax,
function sendMessage() {
var curPath=window.document.location.href;
var pathName=window.document.location.pathname;
var pos=curPath.indexOf(pathName);
var localhostPaht=curPath.substring(0,pos);
var projectName=pathName.substring(0,pathName.substr(1).indexOf('/')+1);
var params={
"name":"wangdneggao"
}
var json = JSON.stringify(params);
$.ajax({
url : localhostPaht + projectName+"/demo/index",
data:json,
type : 'post',
contentType : 'application/json;charset=utf-8',
success : function(data) {
console.log(data);
},
error : function(error) {
console.log('接口不通' + error);
}
});
}
sendMessage();
调用后台的demo/index这个接口,但是访问了半天可以总是提示404
如下:
出现这样的结果当然是让人和头疼的因为这个问题,我调试一天,工程重新搭建,重新搭建,就这样
但是到最后的时刻,问题还是解决了,让人还是能看到一些生活的希望
听说SpringMVC的配置很重要,那么我们首先从pom.xml文件说起:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.wdg.SqzpAdmin</groupId>
<artifactId>SqzpAdmin</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<build>
<finalName>SqzpAdmin</finalName>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.1</version>
<configuration>
<path>/SqzpAdmin</path>
<port>8080</port>
<uriEncoding>UTF-8</uriEncoding>
<server>tomcat7</server>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.0</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<spring.version>4.0.5.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.47</version>
</dependency>
</dependencies>
</project>
上面是一个非常简单的SpringMVC,里面用到的使用到的依赖都是最为基础的依赖,那么下下面是web.xml
当然仅仅配置一个转发器就行了:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<display-name>SqzpAdmin</display-name>
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
这些都配置好了之后要做的事情是:SpringMVC-servlet.xml
<?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"
xmlns:util="http://www.springframework.org/schema/util" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-4.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd">
<!-- 解决中文乱码 -->
<mvc:annotation-driven>
<mvc:message-converters register-defaults="true">
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/plain;charset=UTF-8</value>
<value>text/html;charset=UTF-8</value>
<value>application/json;charset=UTF-8</value>
</list>
</property>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
<bean id="utf8Charset" class="java.nio.charset.Charset"
factory-method="forName">
<constructor-arg value="UTF-8" />
</bean>
<bean class="org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter" />
<bean
class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/" />
</bean>
<!-- 静态资源处理 -->
<mvc:default-servlet-handler />
<mvc:annotation-driven />
<context:component-scan base-package="com.wdg.controller"></context:component-scan>
</beans>
还有一个是controller:
package com.wdg.controller;
import java.io.IOException;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.wdg.util.BuildJsonOfObject;
@Controller
@RequestMapping("/demo")
public class DemoController {
private Logger log;
public DemoController() {
this.log = Logger.getLogger(this.getClass());
}
@RequestMapping("/index")
public String index(@RequestBody String params) {
log.info("-----------------开始addcomment------------------------------------");
log.info("-----------------结束addcomment------------------------------------");
return BuildJsonOfObject.buildJsonOfString("demo");
}
@RequestMapping(value = "/addcomment", produces = "application/json; charset=utf-8")
public @ResponseBody String addComment(@RequestBody String params) throws IOException {
log.info("-----------------开始addcomment------------------------------------");
log.info("-----------------结束addcomment------------------------------------");
return params;
}
}
上面就是简单的工程了,但是访问一直出现404,原因是因为我们需要在接口的前面加上:@ResponseBody 这个注释,问题就解决了,希望对你有所帮助