java: 找不到符号 符号: 方法 success() 位置: @interface org.apache.ibatis.annotations.Result
时间: 2023-09-22 16:09:13 浏览: 382
您好!根据您提供的错误信息,看起来您在使用Java编写代码时遇到了一个问题。
错误消息中显示找不到符号,具体是一个名为`success()`的方法。该方法的位置在`org.apache.ibatis.annotations.Result`注解中。
根据这个错误信息,可能是以下几种情况导致的:
1. 方法确实不存在:请检查您的代码,确保在`org.apache.ibatis.annotations.Result`注解中确实定义了一个名为`success()`的方法。如果没有,您需要添加该方法或者修改注解中的方法名。
2. 编译错误:如果您最近对代码进行了修改,并且没有正确编译,可能会导致找不到符号的错误。请尝试重新编译代码并检查是否解决了问题。
3. 依赖问题:如果您使用了外部库或框架,可能是由于依赖问题导致找不到符号。请确保您已正确导入所需的库和框架,并且版本兼容。
请根据以上提示逐一排查问题,希望能帮到您!如果您有更多问题,请随时提问。
相关问题
使用SSM框架完成用户信息查询的示例. 可以写前端页面只返回json信息 要求3:在代码中需要体现控制层(controller)调用服务层(service),服务层(service)调用dao层
假设我们要查询用户信息,具体实现如下:
前端页面:
```html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户信息查询</title>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
</head>
<body>
<label for="userId">用户ID:</label>
<input type="text" id="userId">
<br>
<button onclick="getUserInfo()">查询</button>
<br>
<br>
<table id="userInfoTable" border="1">
<tr>
<th>用户ID</th>
<th>用户名</th>
<th>性别</th>
<th>年龄</th>
</tr>
</table>
</body>
<script>
function getUserInfo() {
var userId = $('#userId').val();
$.ajax({
url: "/user/info",
data: {
userId: userId
},
success: function (result) {
$("#userInfoTable tr:not(:first)").empty();
if (result.code == "200") {
var data = result.data;
for (var i = 0; i < data.length; i++) {
var tr = $("<tr></tr>");
tr.append("<td>" + data[i].userId + "</td>");
tr.append("<td>" + data[i].username + "</td>");
tr.append("<td>" + data[i].gender + "</td>");
tr.append("<td>" + data[i].age + "</td>");
$("#userInfoTable").append(tr);
}
} else {
alert(result.msg);
}
}
});
}
</script>
</html>
```
控制层(controller):
```java
package com.example.controller;
import com.example.entity.User;
import com.example.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.List;
@Controller
public class UserController {
@Autowired
private UserService userService;
@GetMapping("/user/info")
@ResponseBody
public Result<List<User>> getUserInfo(@RequestParam("userId") Integer userId) {
List<User> userList = userService.getUserInfo(userId);
if (userList != null && userList.size() > 0) {
return new Result<>(200, "查询成功", userList);
} else {
return new Result<>(500, "查询失败", null);
}
}
static class Result<T> {
private int code;
private String msg;
private T data;
public Result(int code, String msg, T data) {
this.code = code;
this.msg = msg;
this.data = data;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public T getData() {
return data;
}
public void setData(T data) {
this.data = data;
}
}
}
```
服务层(service):
```java
package com.example.service;
import com.example.dao.UserDao;
import com.example.entity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserService {
@Autowired
private UserDao userDao;
public List<User> getUserInfo(Integer userId) {
return userDao.getUserInfo(userId);
}
}
```
持久层(dao):
```java
package com.example.dao;
import com.example.entity.User;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface UserDao {
List<User> getUserInfo(@Param("userId") Integer userId);
}
```
以上就是一个基于SSM框架实现的用户信息查询的示例,其中控制层(controller)调用服务层(service),服务层(service)调用dao层。前端页面只返回json信息。
用springboot,vue,mybatis和elementUI实现上传PDF文件到数据库,需要上传到数据库的内容有文件名,文件上传时间,文件路径,上传者的编号。请告诉我需要添加的依赖,domain代码,controller代码,业务逻辑组件类代码,前端vue和element代码,mybatis代码和数据库建表语句,并用注释讲解
非常感谢您的提问,以下是您所需要的答案:
1. 添加依赖:
在 pom.xml 文件中添加以下依赖:
```
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.4</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.22</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.2.13</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.20</version>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itextpdf</artifactId>
<version>5.5.13.2</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.62</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-io</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.4</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>2.4.2</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>5.1.11</version>
</dependency>
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.2.13</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-core</artifactId>
<version>1.4.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.github.jai-imageio</groupId>
<artifactId>jai-imageio-jpeg2000</artifactId>
<version>1.3.0</version>
</dependency>
```
2. Domain 代码:
```
package com.example.demo.domain;
import lombok.Data;
@Data
public class PdfFile {
private Integer id;
private String fileName;
private String filePath;
private String uploadTime;
private Integer uploaderId;
}
```
3. Controller 代码:
```
package com.example.demo.controller;
import com.alibaba.fastjson.JSONObject;
import com.example.demo.domain.PdfFile;
import com.example.demo.service.PdfFileService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
@Controller
@RequestMapping("/pdfFile")
public class PdfFileController {
@Autowired
private PdfFileService pdfFileService;
@PostMapping("/upload")
@ResponseBody
public JSONObject upload(@RequestParam("file") MultipartFile file, @RequestParam("uploaderId") Integer uploaderId) throws IOException {
JSONObject result = new JSONObject();
if (file.isEmpty()) {
result.put("code", 400);
result.put("msg", "上传失败,请选择文件");
return result;
}
String fileName = file.getOriginalFilename();
String suffixName = fileName.substring(fileName.lastIndexOf("."));
String filePath = "D:/pdfFiles/";
fileName = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()) + "_" + uploaderId + suffixName;
File dest = new File(filePath + fileName);
if (!dest.getParentFile().exists()) {
dest.getParentFile().mkdirs();
}
file.transferTo(dest);
PdfFile pdfFile = new PdfFile();
pdfFile.setFileName(fileName);
pdfFile.setFilePath(filePath + fileName);
pdfFile.setUploadTime(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()));
pdfFile.setUploaderId(uploaderId);
pdfFileService.insert(pdfFile);
result.put("code", 200);
result.put("msg", "上传成功");
return result;
}
}
```
4. 业务逻辑组件类代码:
```
package com.example.demo.service.impl;
import com.example.demo.domain.PdfFile;
import com.example.demo.mapper.PdfFileMapper;
import com.example.demo.service.PdfFileService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class PdfFileServiceImpl implements PdfFileService {
@Autowired
private PdfFileMapper pdfFileMapper;
@Override
public int insert(PdfFile pdfFile) {
return pdfFileMapper.insert(pdfFile);
}
}
```
5. 前端 Vue 和 Element 代码:
```
<template>
<div class="pdf-file-upload">
<el-upload
class="upload-demo"
action="/pdfFile/upload"
:data="{ uploaderId: uploaderId }"
:on-success="handleSuccess"
:before-upload="beforeUpload"
:file-list="fileList"
multiple>
<el-button size="small" type="primary">点击上传</el-button>
<div slot="tip" class="el-upload__tip">只能上传pdf文件</div>
</el-upload>
</div>
</template>
<script>
export default {
name: "PdfFileUpload",
data() {
return {
uploaderId: 1,
fileList: []
};
},
methods: {
beforeUpload(file) {
const isPdf = file.type === "application/pdf";
if (!isPdf) {
this.$message.error("只能上传pdf文件");
}
return isPdf;
},
handleSuccess(response, file, fileList) {
if (response.code === 200) {
this.$message.success(response.msg);
} else {
this.$message.error(response.msg);
}
}
}
};
</script>
```
6. MyBatis 代码:
```
package com.example.demo.mapper;
import com.example.demo.domain.PdfFile;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface PdfFileMapper {
@Insert("INSERT INTO pdf_file(file_name, file_path, upload_time, uploader_id) VALUES(#{fileName}, #{filePath}, #{uploadTime}, #{uploaderId})")
int insert(PdfFile pdfFile);
}
```
7. 数据库建表语句:
```
CREATE TABLE `pdf_file` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`file_name` varchar(255) NOT NULL,
`file_path` varchar(255) NOT NULL,
`upload_time` datetime NOT NULL,
`uploader_id` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
```
以上是您所需要的答案,希望能够帮助到您!
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