mybatis-meven-web项目报错500，Error parsing SQL Mapper Configuration.

这是一个简单的用户登录功能

  1. 用户填写用户名密码，提交到LoginServlet
  2. 在LoginServlet中使用Mybatis查询数据库，验证用户名密码是否正确
  3. 如果正确，响应“登陆成功”，否则登陆失败

1.目录结构

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2.target中的mapper和接口

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3.报错信息

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4.UserMapper接口代码

package com.oqs.mapper;

import com.oqs.pojo.User;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
/**
 * @author ikun
 */
public interface UserMapper {
    @Select("select * from tb_user where username=#{username}} and paaword=#{password}")
    User select(@Param("username") String username,@Param("password") String password);
}

5.UserMapper.xml


mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.oqs.mapper.UserMapper">

mapper>

6.LoginServlet代码

package com.oqs.web;

import com.oqs.mapper.UserMapper;
import com.oqs.pojo.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.Writer;

/**
 * @author ikun
 */
@WebServlet("/loginServlet")
public class LoginServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        String username = request.getParameter("username");
        String password = request.getParameter("password");


        String resource = "mybatis-config.xml";
        InputStream inputStream = Resources.getResourceAsStream(resource);
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);

        SqlSession sqlSession = sqlSessionFactory.openSession();

        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        User user = mapper.select(username, password);
        sqlSession.close();

        response.setContentType("txt/html;charset=utf-8");
        PrintWriter writer = response.getWriter();
        if (user != null) {
            //登陆成功
            writer.write("登陆成功");
        } else {
            writer.write("登陆失败");
        }

    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doGet(request, response);
    }
}

7.login.html代码

html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>logintitle>
    <link href="css/login.css" rel="stylesheet">
head>

<body>
<div id="loginDiv">
    <form action="/request-demo2/loginServlet" method="post" id="form">
        <h1 id="loginMsg">LOGIN INh1>
        <p>Username:<input id="username" name="username" type="text">p>

        <p>Password:<input id="password" name="password" type="password">p>

        <div id="subDiv">
            <input type="submit" class="button" value="login up">
            <input type="reset" class="button" value="reset">   
            <a href="register.html">没有账号？点击注册a>
        div>
    form>
div>

body>
html>

8.mybatis配置文件


configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql:///db1?useSSL=false&useServerPrepStmts=true"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            dataSource>
        environment>
    environments>
    <mappers>
        <mapper resource="com.oqs.mapper.UserMapper.xml"/>
    mappers>
configuration>

9.pom.xml

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0modelVersion>
    <groupId>org.examplegroupId>
    <artifactId>request-demo2artifactId>
    <packaging>warpackaging>
    <version>1.0-SNAPSHOTversion>
    <name>request-demo2 Maven Webappname>
    <url>http://maven.apache.orgurl>
    <properties>
        <maven.compiler.source>8maven.compiler.source>
        <maven.compiler.target>8maven.compiler.target>
    properties>


    <dependencies>
        <dependency>
            <groupId>javax.servletgroupId>
            <artifactId>javax.servlet-apiartifactId>
            <version>4.0.1version>
            <scope>providedscope>
        dependency>

        <dependency>
            <groupId>org.mybatisgroupId>
            <artifactId>mybatisartifactId>
            <version>3.5.13version>
        dependency>

        <dependency>
            <groupId>mysqlgroupId>
            <artifactId>mysql-connector-javaartifactId>
            <version>5.1.49version>
        dependency>

        <dependency>
            <groupId>commons-iogroupId>
            <artifactId>commons-ioartifactId>
            <version>2.7version>
        dependency>

        <dependency>
            <groupId>junitgroupId>
            <artifactId>junitartifactId>
            <version>3.8.1version>
            <scope>testscope>
        dependency>
    dependencies>

    <build>
        <resources>
            <resource>
                <directory>src/main/resourcesdirectory>
                <includes>
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>truefiltering>
            resource>
            <resource>
                <directory>src/main/javadirectory>
                <includes >
                    <include>**/*.propertiesinclude>
                    <include>**/*.xmlinclude>
                includes>
                <filtering>truefiltering>
            resource>
        resources>

        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.mavengroupId>
                <artifactId>tomcat7-maven-pluginartifactId>
                <version>2.2version>
            plugin>
        plugins>
    build>

project>

xml文件的扫描路径配置了吗？

img

把点换成斜线

  <mapper resource="com/oqs/mapper/UserMapper.xml"/>