spring mvc无xml

Spring MVC无xml文件

项目结构

pom.xml文件

<?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>com.xsh136</groupId>
    <artifactId>explorer</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>war</packaging>
    <dependencies>
        <!--引入servlet-->
        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <!--引入spring mvc-->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.3.9.RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.8</version>
        </dependency>


    </dependencies>


    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
            </plugin>
        </plugins>
    </build>

</project>

配置

WEBConf.java

配置文件，继承 WebMvcConfigurerAdapter类，功能与

springmvc-config.xml

配置文件一样，类上应该加@Configuration、
@ComponentScan、
@EnableWebMvc三个注解，重写的方法应该加上@Bean注解

package com.xsh136.explorer.conf;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.
Configuration;
import org.springframework.http.converter.json.
MappingJackson2HttpMessageConverter;
import org.springframework.web.multipart.MultipartResolver;
import org.springframework.web.multipart.commons.
CommonsMultipartResolver;
import org.springframework.web.servlet.config.annotation.
DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.
EnableWebMvc;
import org.springframework.web.servlet.config.annotation.
WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.
InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;

/**
 * Created by ZWW on 2017/8/3.
 */
@Configuration
@ComponentScan(basePackages = {"com.xsh136.explorer.controller"})
@EnableWebMvc
public class WEBConf extends WebMvcConfigurerAdapter{
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        super.configureDefaultServletHandling(configurer);
        configurer.enable();
    }

    @Bean
    public InternalResourceViewResolver viewResolver(){
        InternalResourceViewResolver bean=new InternalResourceViewResolver();
        bean.setViewClass(JstlView.class);
        bean.setPrefix("/WEB-INF/jsp/");
        bean.setSuffix(".jsp");
        return bean;
    }

    @Bean("multipartResolver")
    public MultipartResolver multipartResolver(){
        CommonsMultipartResolver bean=new CommonsMultipartResolver();
        bean.setDefaultEncoding("utf-8");
        return bean;
    }

    @Bean
    public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter(){
        MappingJackson2HttpMessageConverter bean=new MappingJackson2HttpMessageConverter();
        return bean;
    }
}

MVCLoader类继承AbstractAnnotationConfigDispatcherServletInitializer类，实现其中的方法，修改getServletConfigClasses（）方法和getServletMappings()方法

package com.xsh136.explorer.conf;

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

/**
 * Created by ZWW on 2017/8/3.
 */
public class MVCLoader extends AbstractAnnotationConfigDispatcherServletInitializer{

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

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

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

编写ExplorerController类，加@Controller、
@RequestMapping注解，代码如下：

package com.xsh136.explorer.controller;

import com.xsh136.explorer.tree.TreeNodeMy;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.
RequestMapping;
import org.springframework.web.bind.annotation.
ResponseBody;

import javax.swing.filechooser.FileSystemView;
import java.io.File;
import java.io.FileFilter;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * Created by ZWW on 2017/8/3.
 */
@Controller
@RequestMapping("/explorer")
public class ExplorerController {
    FileSystemView fsv=FileSystemView.getFileSystemView();
    SimpleDateFormat sdf=new SimpleDateFormat("yyyy/MM/dd HH:mm");
    DecimalFormat df=new DecimalFormat("###,####");
    @RequestMapping("/hello")
    public String hello(){
        return "hello";
    }

    @RequestMapping("/tree")
    @ResponseBody
    public List<TreeNodeMy> tree(String id){
        List<TreeNodeMy> treeNodeMies =new ArrayList<>();
        File[] files=null;
        if(id==null){
            files=File.listRoots();
        }else {
            files=new File(id).listFiles(new FileFilter() {
                @Override
                public boolean accept(File pathname) {
                    return pathname.isDirectory();
                }
            });
        }
        if(files!=null){
            for(File file:files){
                treeNodeMies.add(new TreeNodeMy(file.getAbsolutePath(),fsv.getSystemDisplayName(file)));
            }
        }
        return treeNodeMies;
    }

    @RequestMapping("/list")
    @ResponseBody
    public List<Map<String,String>> list(String id){
        List<Map<String,String>> datas=new ArrayList<>();

        File[] files=null;
        if(id!=null){
            files=new File(id).listFiles();
        }
        if(files!=null){
            for(File file:files){
                Map<String,String> map=new HashMap<>();
                map.put("name",fsv.getSystemDisplayName(file));
                map.put("modifyDate",sdf.format(new Date(file.lastModified())));
                map.put("type",fsv.getSystemTypeDescription(file));
                String size="";

                if(file.isFile()){
                    size=df.format(file.length());
                    map.put("size",size+"B");
                }
                datas.add(map);
            }
        }
        return datas;
    }
}

编写TreeNodeMy类，用于显示目录树结构

package com.xsh136.explorer.tree;

/**
 * Created by ZWW on 2017/8/3.
 */
public class TreeNodeMy {
    private String id;
    private String text;
    private String state="closed";

    public TreeNodeMy(String id, String text) {
        this.id = id;
        this.text = text;
    }

    public TreeNodeMy() {
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

    public String getState() {
        return state;
    }

    public void setState(String state) {
        this.state = state;
    }
}

采用easyui来进行界面显示，需要导入响应的文件，在WEB-INF下建立一个static文件夹，将所需要的文件加入进去
然后在webapp下建立一个html文件，代码如下

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" type="text/css" href="static/themes/icon.css">
    <link rel="stylesheet" type="text/css" href="static/themes/default/easyui.css">
    <script type="text/javascript" src="static/jquery.min.js"></script>
    <script type="text/javascript" src="static/jquery.easyui.min.js"></script>
    <script type="text/javascript">
        $(function () {
            $('#tree').tree({
                url:'explorer/tree',
                onClick: function(a){
                   // alert(a.text);  // 在用户点击的时候提示
                    $("#list").datagrid({
                        queryParams:{
                            id:a.id
                        }
                    })
                }

            });
            $('#list').datagrid({
                url:'explorer/list',
                columns:[[
                    {field:'name',title:'名称',width:100},
                    {field:'modifyDate',title:'修改日期',width:100},
                    {field:'type',title:'类型',width:100},
                    {field:'size',title:'大小'}
                ]]
            });
        })
    </script>
</head>
<body class="easyui-layout">

    <div data-options="region:'west',title:'目录树',iconCls:'icon-reload', split:true" style="width:300px;">
        <ul id="tree">

        </ul>
    </div>
    <div data-options="region:'center',title:'文件列表'" style="padding:5px;">
        <table id="list"></table>
    </div>
</body>
</html>