一、文件上传
添加文件上传相关依赖
<commons-fileupload.version>1.3.3</commons-fileupload.version>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons-fileupload.version}</version>
</dependency>
添加springmvc-servlet.xml里面的配置
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="UTF-8"></property>
<!-- 文件最大大小(字节) 1024*1024*50=50M-->
<property name="maxUploadSize" value="52428800"></property>
<!--resolveLazily属性启用是为了推迟文件解析,以便捕获文件大小异常-->
<property name="resolveLazily" value="true"/>
</bean>
uploa.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>文件上传</title>
</head>
<body>
<form action="${pageContext.request.contextPath}/book/upload" method="post" enctype="multipart/form-data">
上传文件:<<input type="file" name="file">
<button type="submit">上传</button>
</form>
</body>
</html>
HelloController
package com.xhh.controller;
import com.xhh.service.BookService;
import com.xhh.util.JSONResult;
import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.Map;
/**
* @author 林耀东
* @site www.baidu.com
* @company
* @create 2019-11-24 18:50
*/
/**
* 五种返回形式
* 1,转发到jsp界面
* 2, 转发到Action界面
* 3, 重定向到jsp界面
* 4, 重定向到Action界面
*/
@RequestMapping("/hello")
@Controller
public class HelloController {
@Autowired
private BookService bookService;
/**
* 重定向到jsp界面
* @param request
* @return
*/
@RequestMapping("/hello3")
public String hello3(HttpServletRequest request){
request.setAttribute("msg","调用了重定向方法到jsp页面");
return "redirect:/hello.jsp";
}
@RequestMapping("/upload")
public String upload(HttpServletRequest request, MultipartFile img){
try {
FileUtils.copyInputStreamToFile(img.getInputStream(),new File("D://imgs//"+img.getOriginalFilename()));
} catch (IOException e) {
e.printStackTrace();
}
return "redirect:hello3";
}
}
二、josn
package com.xhh.util;
public class JSONResult {
// 响应业务状态
private Integer status;
// 响应消息
private String msg;
// 响应中的数据
private Object data;
private String ok; // 不使用
public static JSONResult build(Integer status, String msg, Object data) {
return new JSONResult(status, msg, data);
}
public static JSONResult ok(Object data) {
return new JSONResult(data);
}
public static JSONResult ok() {
return new JSONResult(null);
}
public static JSONResult errorMsg(String msg) {
return new JSONResult(500, msg, null);
}
public static JSONResult errorMap(Object data) {
return new JSONResult(501, "error", data);
}
public static JSONResult errorTokenMsg(String msg) {
return new JSONResult(502, msg, null);
}
public static JSONResult errorException(String msg) {
return new JSONResult(555, msg, null);
}
public JSONResult() {
}
public JSONResult(Integer status, String msg, Object data) {
this.status = status;
this.msg = msg;
this.data = data;
}
public JSONResult(Object data) {
this.status = 200;
this.msg = "OK";
this.data = data;
}
public Boolean isOK() {
return this.status == 200;
}
public Integer getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
public String getOk() {
return ok;
}
public void setOk(String ok) {
this.ok = ok;
}
}
BookController
package com.xhh.ssm.controller;
import com.xhh.ssm.model.Book;
import com.xhh.ssm.service.BookService;
import com.xhh.ssm.utils.PageBean;
import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
@Controller
@RequestMapping("/book")
public class BookController {
@Autowired
private BookService bookService;
/* josn */
@ResponseBody
@RequestMapping("/json1")
public Map json1(Book book,HttpServletRequest request){
PageBean pageBean = new PageBean();
pageBean.setRequest(request);
List<Map> list = this.bookService.listPager(book, pageBean);
Map map = new HashMap();
map.put("total",pageBean.getTotal());
map.put("data",list);
return map;
}
@ResponseBody
@RequestMapping("/json2")
public List<Map> json2(Book book,HttpServletRequest request){
PageBean pageBean = new PageBean();
pageBean.setRequest(request);
List<Map> list = this.bookService.listPager(book, pageBean);
return list;
}
@ResponseBody
@RequestMapping("/json3")
public String json3(Book book,HttpServletRequest request){
return "springmvc string to josn";
}
}