【java】SpringMVC基础配置

本当迷

2022 年 07 月 31 日

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java

## pom.xml

```java
<?xml version="1.0" encoding="UTF-8"?>

<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">
    <parent>
        <artifactId>spring</artifactId>
        <groupId>org.example</groupId>
        <version>1.0-SNAPSHOT</version>
    </parent>
    <modelVersion>4.0.0</modelVersion>

<artifactId>springMVC02</artifactId>
    <packaging>war</packaging>

<name>springMVC02 Maven Webapp</name>
    
    <url>http://www.example.com</url>

<dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.10.RELEASE</version>
        </dependency>
    </dependencies>

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.1</version>
                <configuration>
                    <port>80</port>
                    <path>/</path>
                    
                    <uriEncoding>UTF-8</uriEncoding>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

```

## ServletIntiConfig类

servlet加载SpringMVC

```java
package com.bdm.config;

import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

import javax.servlet.Filter;

public class ServletContainersInitConfig extends AbstractAnnotationConfigDispatcherServletInitializer {

protected Class<?>[] getServletConfigClasses() {
        return new Class[]{SpringMvcConfig.class};
    }

protected String[] getServletMappings() {
        return new String[]{"/"};
    }

protected Class<?>[] getRootConfigClasses() {
        return new Class[0];
    }

@Override
    protected Filter[] getServletFilters() {
        // 防止乱码
        final CharacterEncodingFilter filter = new CharacterEncodingFilter();
        filter.setEncoding("UTF-8");

return new Filter[]{filter};
    }
}

```

## SpringMvcConfig类

spring相关配置

```java
package com.bdm.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

/**
 * @code Description
 * @code author 本当迷
 * @code date 2022/7/31-12:30
 */
// 创建springmvc的配置文件，加载controller对应的bean
@Configuration
@ComponentScan("com.bdm.controller")
public class SpringMvcConfig {

}

```

## UserController

业务处理

```java
package com.bdm.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * @code Description
 * @code author 本当迷
 * @code date 2022/7/31-12:24
 */
// 使用@Controller定义MVC bean
@Controller
public class UserController {

// 设置当前操作的访问路径
    @RequestMapping("/save")
    // 设置当前操作的返回值类型
    @ResponseBody
    public String save(){
        System.out.println("user save ...");
        return "{'name':'bdm'}";
    }
}

```

最后修改：2022 年 07 月 31 日