springMvc精简整理

精简共分步

新建一个web工程  导入核心就二包，因为springmvc 包自己有依赖

<?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">
  <modelVersion>4.0.0</modelVersion>

  <groupId>org.example</groupId>
  <artifactId>untitled</artifactId>
  <version>1.0-SNAPSHOT</version>
   <packaging>war</packaging>
  <properties>

    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>
  <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>
</project>
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spring核心配置

package com.ithm.zConfig;

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

@Configuration
@ComponentScan("com.ithm.Config")
public class Springconfig {
}

 

 

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第三步  spring MVC 配置

package com.ithm.zConfig;

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

import javax.servlet.Filter;

public class ServletConfig  extends AbstractAnnotationConfigDispatcherServletInitializer {
    @Override
    protected Class<?>[] getRootConfigClasses() {
        return new Class[0];
    }

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

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

    @Override
    //本方来自spring web包，解析post 中文乱码
    protected Filter[] getServletFilters() {
        CharacterEncodingFilter filter = new CharacterEncodingFilter();
        filter.setEncoding("UTF-8");
        return new Filter[]{filter};
    }
}

 

 

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配置mvc那儿上面是精简写法，原写法为：

package com.ithm.zConfig;

import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.support.AbstractDispatcherServletInitializer;

public class ServletConfigInitbask extends AbstractDispatcherServletInitializer {
    @Override
    protected WebApplicationContext createServletApplicationContext() {
        AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
        ctx.register(Springconfig.class);
        return ctx;
    }

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

    @Override
    protected WebApplicationContext createRootApplicationContext() {
        return null;
    }
}
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++=最后一步是控制器++++++++++++

package com.ithm.Config;

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

@Controller
public class UserConfig {
    @RequestMapping("/eee")
    @ResponseBody
    public String save(String name,String age){
        System.out.println("name"+""+"="+ name);
        System.out.println("age"+""+"="+ age);
        return "{'a':'b2002'}";
    }
    @RequestMapping("/add")
    @ResponseBody
    public String add(){
        System.out.println("kkkk");
        return "{'d':'dddd'}";
    }

}

 

 如果是乱码以下是乱码解决：

    @Override
    //本方来自spring web包，解析post 中文乱码
    protected Filter[] getServletFilters() {
        CharacterEncodingFilter filter = new CharacterEncodingFilter();
        filter.setEncoding("UTF-8");
        return new Filter[]{filter};
    }
}

 

 

 

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++最简化示例完整结束+++++++++++++++++++++++++++++++++++++

 

以下是参数使用：

 

 客户端传参和服务器不一样使用@RequestParam（“”）括号里面放浏览器传来的参数。

public String save(@RequestParam("name") String name, String age){
如果对方传数组，只需要参数中name一样
public string arrParam(String[] likes)
如果对方传list 只需要参数和数组一样传，服务器指定参数时写法增加@RequestParam
pulic string listParam (@requestParam List<String> likes)

服务器要想支持json 共分4步
要加载json包，还需要在spring配置支持 json转换 @EbdbkeWebMvc,最后还在服务器参数中后中加@requestBody
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<dependency>
  <groupId>com.fasterxml.jackson.core</groupId>
  <artifactId>jackson-databind</artifactId>
  <version>2.9.0</version>
</dependency>

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最后浏览器发送，浏览器发送对像也可以pojo对象接收，json能自动处理

 

 

 

 如果浏览器发送多个List 也可以用json接收

 对于日期类型: 默认只支持Date 2008/2/5这样格式，加“-”这样就不行了

：

 

 

 

 

 

服务器返回，默认是返回页面，如果想直接返回数据：

 

 

REST 表现形式壮态转换

@RequestMapping(value = “/user/{id}”,method = RequestMethod.DELETE)

Public String delete(@pathVariable Integer id)

 

 

 

 

 全部精简后写法：

不同请求方式示例：

 

 

 

精简前参考：

 

 

 

 

 

最后静态文件放行

 

 

 

 

 

 

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