mybatis_generator

SSM-Mybatis-Generator

• Mybatis是目前很流行得一个持久层框架,Mybatis得逆向工程会根据我们设计好得数据库表(大前提),自动生成javabean(xxx.java,xxxExample.java), xxxMapper.java(interface), xxxMapper.xml

• IDEA + Mysql + Java程序 + xml配置文件 + SSM

  这里省略数据库建表得步骤.

Project Construct:

Step1 导入依赖

向"pom.xml"文件中加入下面的依赖

<dependency>
    <groupId>org.mybatis.generatorgroupId>
    <artifactId>mybatis-generator-coreartifactId>
    <version>1.3.5version>
dependency>

Step2 XML配置文件示例

在项目中添加"mbg.xml",可以随意取名,位置随意,只要在核心Java程序(在下面叫:“MBGTest.java”)中写对这个配置文件的路径就可以.

In the most common use case, MyBatis Generator (MBG) is driven by an XML configuration file. The configuration file tells MBG:

• How to connect to the database
• What objects to generate, and how to generate them
• What tables should be used for object generation

Official Website:http://www.mybatis.org/generator/configreference/xmlconfig.html

<generatorConfiguration>

    
    <context id="DB2Tables" targetRuntime="MyBatis3">
        
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        commentGenerator>

        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/classpie"
                        userId="root"
                        password="">
        jdbcConnection>

        
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        javaTypeResolver>

        
        <javaModelGenerator targetPackage="com.maven.ssm.bean" targetProject=".\src\main\java">
            
            <property name="enableSubPackages" value="true"/>
            
            <property name="trimStrings" value="true"/>
        javaModelGenerator>

        
        <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
            <property name="enableSubPackages" value="true"/>
        sqlMapGenerator>

        
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.maven.ssm.dao" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true"/>
        javaClientGenerator>
        
        
        <table tableName="classinfo" domainObjectName="ClassInfo">table>
        <table tableName="userinfo" domainObjectName="UserInfo">table>
    context>

generatorConfiguration>

Step3 Java核心程序

“MBGTest.java”,代码如下,黏贴复制修改一下xml配置文件的路径,没有其他的技术含量.

然后只需要运行一下这个Java程序就成了.

public class MBGTest {

	public static void main(String[] args) throws Exception {
		List<String> warnings = new ArrayList<String>();
		boolean overwrite = true;
		File configFile = new File("mbg.xml");
		ConfigurationParser cp = new ConfigurationParser(warnings);
		Configuration config = cp.parseConfiguration(configFile);
		DefaultShellCallback callback = new DefaultShellCallback(overwrite);
		MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
				callback, warnings);
		myBatisGenerator.generate(null);
	}

}

Step4 结果

来看一下运行完的结果,项目发生了哪些变化:

UserInfo.java

package com.maven.ssm.bean;

public class UserInfo {
    private String account;

    private String phone;

    private String password;

    private String name;

    private String school;

    private Integer role;

    private String avatar;

    public String getAccount() {
        return account;
    }

    public void setAccount(String account) {
        this.account = account == null ? null : account.trim();
    }

    public String getPhone() {
        return phone;
    }

    public void setPhone(String phone) {
        this.phone = phone == null ? null : phone.trim();
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name == null ? null : name.trim();
    }

    public String getSchool() {
        return school;
    }

    public void setSchool(String school) {
        this.school = school == null ? null : school.trim();
    }

    public Integer getRole() {
        return role;
    }

    public void setRole(Integer role) {
        this.role = role;
    }

    public String getAvatar() {
        return avatar;
    }

    public void setAvatar(String avatar) {
        this.avatar = avatar == null ? null : avatar.trim();
    }
}

UserInfoExample.java

package com.maven.ssm.bean;

import java.util.ArrayList;
import java.util.List;

public class UserInfoExample {
    protected String orderByClause;

    protected boolean distinct;

    protected List<Criteria> oredCriteria;

    public UserInfoExample() {
        oredCriteria = new ArrayList<Criteria>();
    }

    public void setOrderByClause(String orderByClause) {
        this.orderByClause = orderByClause;
    }

    public String getOrderByClause() {
        return orderByClause;
    }

    public void setDistinct(boolean distinct) {
        this.distinct = distinct;
    }

    public boolean isDistinct() {
        return distinct;
    }

    public List<Criteria> getOredCriteria() {
        return oredCriteria;
    }

    public void or(Criteria criteria) {
        oredCriteria.add(criteria);
    }

    public Criteria or() {
        Criteria criteria = createCriteriaInternal();
        oredCriteria.add(criteria);
        return criteria;
    }

    public Criteria createCriteria() {
        Criteria criteria = createCriteriaInternal();
        if (oredCriteria.size() == 0) {
            oredCriteria.add(criteria);
        }
        return criteria;
    }

    protected Criteria createCriteriaInternal() {
        Criteria criteria = new Criteria();
        return criteria;
    }

    public void clear() {
        oredCriteria.clear();
        orderByClause = null;
        distinct = false;
    }

    protected abstract static class GeneratedCriteria {
        protected List<Criterion> criteria;

        protected GeneratedCriteria() {
            super();
            criteria = new ArrayList<Criterion>();
        }

        public boolean isValid() {
            return criteria.size() > 0;
        }

        public List<Criterion> getAllCriteria() {
            return criteria;
        }

        public List<Criterion> getCriteria() {
            return criteria;
        }

        protected void addCriterion(String condition) {
            if (condition == null) {
                throw new RuntimeException("Value for condition cannot be null");
            }
            criteria.add(new Criterion(condition));
        }

        protected void addCriterion(String condition, Object value, String property) {
            if (value == null) {
                throw new RuntimeException("Value for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition, value));
        }

        protected void addCriterion(String condition, Object value1, Object value2, String property) {
            if (value1 == null || value2 == null) {
                throw new RuntimeException("Between values for " + property + " cannot be null");
            }
            criteria.add(new Criterion(condition, value1, value2));
        }

        public Criteria andAccountIsNull() {
            addCriterion("account is null");
            return (Criteria) this;
        }

        public Criteria andAccountIsNotNull() {
            addCriterion("account is not null");
            return (Criteria) this;
        }

        public Criteria andAccountEqualTo(String value) {
            addCriterion("account =", value, "account");
            return (Criteria) this;
        }

        public Criteria andAccountNotEqualTo(String value) {
            addCriterion("account <>", value, "account");
            return (Criteria) this;
        }

        public Criteria andAccountGreaterThan(String value) {
            addCriterion("account >", value, "account");
            return (Criteria) this;
        }

        public Criteria andAccountGreaterThanOrEqualTo(String value) {
            addCriterion("account >=", value, "account");
            return (Criteria) this;
        }

        public Criteria andAccountLessThan(String value) {
            addCriterion("account <", value, "account");
            return (Criteria) this;
        }

        public Criteria andAccountLessThanOrEqualTo(String value) {
            addCriterion("account <=", value, "account");
            return (Criteria) this;
        }

        public Criteria andAccountLike(String value) {
            addCriterion("account like", value, "account");
            return (Criteria) this;
        }

        public Criteria andAccountNotLike(String value) {
            addCriterion("account not like", value, "account");
            return (Criteria) this;
        }

        public Criteria andAccountIn(List<String> values) {
            addCriterion("account in", values, "account");
            return (Criteria) this;
        }

        public Criteria andAccountNotIn(List<String> values) {
            addCriterion("account not in", values, "account");
            return (Criteria) this;
        }

        public Criteria andAccountBetween(String value1, String value2) {
            addCriterion("account between", value1, value2, "account");
            return (Criteria) this;
        }

        public Criteria andAccountNotBetween(String value1, String value2) {
            addCriterion("account not between", value1, value2, "account");
            return (Criteria) this;
        }

        public Criteria andPhoneIsNull() {
            addCriterion("phone is null");
            return (Criteria) this;
        }

        public Criteria andPhoneIsNotNull() {
            addCriterion("phone is not null");
            return (Criteria) this;
        }

        public Criteria andPhoneEqualTo(String value) {
            addCriterion("phone =", value, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneNotEqualTo(String value) {
            addCriterion("phone <>", value, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneGreaterThan(String value) {
            addCriterion("phone >", value, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneGreaterThanOrEqualTo(String value) {
            addCriterion("phone >=", value, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneLessThan(String value) {
            addCriterion("phone <", value, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneLessThanOrEqualTo(String value) {
            addCriterion("phone <=", value, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneLike(String value) {
            addCriterion("phone like", value, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneNotLike(String value) {
            addCriterion("phone not like", value, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneIn(List<String> values) {
            addCriterion("phone in", values, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneNotIn(List<String> values) {
            addCriterion("phone not in", values, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneBetween(String value1, String value2) {
            addCriterion("phone between", value1, value2, "phone");
            return (Criteria) this;
        }

        public Criteria andPhoneNotBetween(String value1, String value2) {
            addCriterion("phone not between", value1, value2, "phone");
            return (Criteria) this;
        }

        public Criteria andPasswordIsNull() {
            addCriterion("password is null");
            return (Criteria) this;
        }

        public Criteria andPasswordIsNotNull() {
            addCriterion("password is not null");
            return (Criteria) this;
        }

        public Criteria andPasswordEqualTo(String value) {
            addCriterion("password =", value, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordNotEqualTo(String value) {
            addCriterion("password <>", value, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordGreaterThan(String value) {
            addCriterion("password >", value, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordGreaterThanOrEqualTo(String value) {
            addCriterion("password >=", value, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordLessThan(String value) {
            addCriterion("password <", value, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordLessThanOrEqualTo(String value) {
            addCriterion("password <=", value, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordLike(String value) {
            addCriterion("password like", value, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordNotLike(String value) {
            addCriterion("password not like", value, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordIn(List<String> values) {
            addCriterion("password in", values, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordNotIn(List<String> values) {
            addCriterion("password not in", values, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordBetween(String value1, String value2) {
            addCriterion("password between", value1, value2, "password");
            return (Criteria) this;
        }

        public Criteria andPasswordNotBetween(String value1, String value2) {
            addCriterion("password not between", value1, value2, "password");
            return (Criteria) this;
        }

        public Criteria andNameIsNull() {
            addCriterion("name is null");
            return (Criteria) this;
        }

        public Criteria andNameIsNotNull() {
            addCriterion("name is not null");
            return (Criteria) this;
        }

        public Criteria andNameEqualTo(String value) {
            addCriterion("name =", value, "name");
            return (Criteria) this;
        }

        public Criteria andNameNotEqualTo(String value) {
            addCriterion("name <>", value, "name");
            return (Criteria) this;
        }

        public Criteria andNameGreaterThan(String value) {
            addCriterion("name >", value, "name");
            return (Criteria) this;
        }

        public Criteria andNameGreaterThanOrEqualTo(String value) {
            addCriterion("name >=", value, "name");
            return (Criteria) this;
        }

        public Criteria andNameLessThan(String value) {
            addCriterion("name <", value, "name");
            return (Criteria) this;
        }

        public Criteria andNameLessThanOrEqualTo(String value) {
            addCriterion("name <=", value, "name");
            return (Criteria) this;
        }

        public Criteria andNameLike(String value) {
            addCriterion("name like", value, "name");
            return (Criteria) this;
        }

        public Criteria andNameNotLike(String value) {
            addCriterion("name not like", value, "name");
            return (Criteria) this;
        }

        public Criteria andNameIn(List<String> values) {
            addCriterion("name in", values, "name");
            return (Criteria) this;
        }

        public Criteria andNameNotIn(List<String> values) {
            addCriterion("name not in", values, "name");
            return (Criteria) this;
        }

        public Criteria andNameBetween(String value1, String value2) {
            addCriterion("name between", value1, value2, "name");
            return (Criteria) this;
        }

        public Criteria andNameNotBetween(String value1, String value2) {
            addCriterion("name not between", value1, value2, "name");
            return (Criteria) this;
        }

        public Criteria andSchoolIsNull() {
            addCriterion("school is null");
            return (Criteria) this;
        }

        public Criteria andSchoolIsNotNull() {
            addCriterion("school is not null");
            return (Criteria) this;
        }

        public Criteria andSchoolEqualTo(String value) {
            addCriterion("school =", value, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolNotEqualTo(String value) {
            addCriterion("school <>", value, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolGreaterThan(String value) {
            addCriterion("school >", value, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolGreaterThanOrEqualTo(String value) {
            addCriterion("school >=", value, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolLessThan(String value) {
            addCriterion("school <", value, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolLessThanOrEqualTo(String value) {
            addCriterion("school <=", value, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolLike(String value) {
            addCriterion("school like", value, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolNotLike(String value) {
            addCriterion("school not like", value, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolIn(List<String> values) {
            addCriterion("school in", values, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolNotIn(List<String> values) {
            addCriterion("school not in", values, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolBetween(String value1, String value2) {
            addCriterion("school between", value1, value2, "school");
            return (Criteria) this;
        }

        public Criteria andSchoolNotBetween(String value1, String value2) {
            addCriterion("school not between", value1, value2, "school");
            return (Criteria) this;
        }

        public Criteria andRoleIsNull() {
            addCriterion("role is null");
            return (Criteria) this;
        }

        public Criteria andRoleIsNotNull() {
            addCriterion("role is not null");
            return (Criteria) this;
        }

        public Criteria andRoleEqualTo(Integer value) {
            addCriterion("role =", value, "role");
            return (Criteria) this;
        }

        public Criteria andRoleNotEqualTo(Integer value) {
            addCriterion("role <>", value, "role");
            return (Criteria) this;
        }

        public Criteria andRoleGreaterThan(Integer value) {
            addCriterion("role >", value, "role");
            return (Criteria) this;
        }

        public Criteria andRoleGreaterThanOrEqualTo(Integer value) {
            addCriterion("role >=", value, "role");
            return (Criteria) this;
        }

        public Criteria andRoleLessThan(Integer value) {
            addCriterion("role <", value, "role");
            return (Criteria) this;
        }

        public Criteria andRoleLessThanOrEqualTo(Integer value) {
            addCriterion("role <=", value, "role");
            return (Criteria) this;
        }

        public Criteria andRoleIn(List<Integer> values) {
            addCriterion("role in", values, "role");
            return (Criteria) this;
        }

        public Criteria andRoleNotIn(List<Integer> values) {
            addCriterion("role not in", values, "role");
            return (Criteria) this;
        }

        public Criteria andRoleBetween(Integer value1, Integer value2) {
            addCriterion("role between", value1, value2, "role");
            return (Criteria) this;
        }

        public Criteria andRoleNotBetween(Integer value1, Integer value2) {
            addCriterion("role not between", value1, value2, "role");
            return (Criteria) this;
        }

        public Criteria andAvatarIsNull() {
            addCriterion("avatar is null");
            return (Criteria) this;
        }

        public Criteria andAvatarIsNotNull() {
            addCriterion("avatar is not null");
            return (Criteria) this;
        }

        public Criteria andAvatarEqualTo(String value) {
            addCriterion("avatar =", value, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarNotEqualTo(String value) {
            addCriterion("avatar <>", value, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarGreaterThan(String value) {
            addCriterion("avatar >", value, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarGreaterThanOrEqualTo(String value) {
            addCriterion("avatar >=", value, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarLessThan(String value) {
            addCriterion("avatar <", value, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarLessThanOrEqualTo(String value) {
            addCriterion("avatar <=", value, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarLike(String value) {
            addCriterion("avatar like", value, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarNotLike(String value) {
            addCriterion("avatar not like", value, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarIn(List<String> values) {
            addCriterion("avatar in", values, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarNotIn(List<String> values) {
            addCriterion("avatar not in", values, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarBetween(String value1, String value2) {
            addCriterion("avatar between", value1, value2, "avatar");
            return (Criteria) this;
        }

        public Criteria andAvatarNotBetween(String value1, String value2) {
            addCriterion("avatar not between", value1, value2, "avatar");
            return (Criteria) this;
        }
    }

    public static class Criteria extends GeneratedCriteria {

        protected Criteria() {
            super();
        }
    }

    public static class Criterion {
        private String condition;

        private Object value;

        private Object secondValue;

        private boolean noValue;

        private boolean singleValue;

        private boolean betweenValue;

        private boolean listValue;

        private String typeHandler;

        public String getCondition() {
            return condition;
        }

        public Object getValue() {
            return value;
        }

        public Object getSecondValue() {
            return secondValue;
        }

        public boolean isNoValue() {
            return noValue;
        }

        public boolean isSingleValue() {
            return singleValue;
        }

        public boolean isBetweenValue() {
            return betweenValue;
        }

        public boolean isListValue() {
            return listValue;
        }

        public String getTypeHandler() {
            return typeHandler;
        }

        protected Criterion(String condition) {
            super();
            this.condition = condition;
            this.typeHandler = null;
            this.noValue = true;
        }

        protected Criterion(String condition, Object value, String typeHandler) {
            super();
            this.condition = condition;
            this.value = value;
            this.typeHandler = typeHandler;
            if (value instanceof List<?>) {
                this.listValue = true;
            } else {
                this.singleValue = true;
            }
        }

        protected Criterion(String condition, Object value) {
            this(condition, value, null);
        }

        protected Criterion(String condition, Object value, Object secondValue, String typeHandler) {
            super();
            this.condition = condition;
            this.value = value;
            this.secondValue = secondValue;
            this.typeHandler = typeHandler;
            this.betweenValue = true;
        }

        protected Criterion(String condition, Object value, Object secondValue) {
            this(condition, value, secondValue, null);
        }
    }
}

UserInfoMapper.java

package com.maven.ssm.dao;

import com.maven.ssm.bean.UserInfo;
import com.maven.ssm.bean.UserInfoExample;
import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface UserInfoMapper {
    long countByExample(UserInfoExample example);

    int deleteByExample(UserInfoExample example);

    int deleteByPrimaryKey(String account);

    int insert(UserInfo record);

    int insertSelective(UserInfo record);

    List<UserInfo> selectByExample(UserInfoExample example);

    UserInfo selectByPrimaryKey(String account);

    int updateByExampleSelective(@Param("record") UserInfo record, @Param("example") UserInfoExample example);

    int updateByExample(@Param("record") UserInfo record, @Param("example") UserInfoExample example);

    int updateByPrimaryKeySelective(UserInfo record);

    int updateByPrimaryKey(UserInfo record);
}

UserInfoMapper.xml

<mapper namespace="com.maven.ssm.dao.UserInfoMapper">
  <resultMap id="BaseResultMap" type="com.maven.ssm.bean.UserInfo">
    <id column="account" jdbcType="VARCHAR" property="account" />
    <result column="phone" jdbcType="VARCHAR" property="phone" />
    <result column="password" jdbcType="VARCHAR" property="password" />
    <result column="name" jdbcType="VARCHAR" property="name" />
    <result column="school" jdbcType="VARCHAR" property="school" />
    <result column="role" jdbcType="INTEGER" property="role" />
    <result column="avatar" jdbcType="VARCHAR" property="avatar" />
  resultMap>
  <sql id="Example_Where_Clause">
    <where>
      <foreach collection="oredCriteria" item="criteria" separator="or">
        <if test="criteria.valid">
          <trim prefix="(" prefixOverrides="and" suffix=")">
            <foreach collection="criteria.criteria" item="criterion">
              <choose>
                <when test="criterion.noValue">
                  and ${criterion.condition}
                when>
                <when test="criterion.singleValue">
                  and ${criterion.condition} #{criterion.value}
                when>
                <when test="criterion.betweenValue">
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                when>
                <when test="criterion.listValue">
                  and ${criterion.condition}
                  <foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
                    #{listItem}
                  foreach>
                when>
              choose>
            foreach>
          trim>
        if>
      foreach>
    where>
  sql>
  <sql id="Update_By_Example_Where_Clause">
    <where>
      <foreach collection="example.oredCriteria" item="criteria" separator="or">
        <if test="criteria.valid">
          <trim prefix="(" prefixOverrides="and" suffix=")">
            <foreach collection="criteria.criteria" item="criterion">
              <choose>
                <when test="criterion.noValue">
                  and ${criterion.condition}
                when>
                <when test="criterion.singleValue">
                  and ${criterion.condition} #{criterion.value}
                when>
                <when test="criterion.betweenValue">
                  and ${criterion.condition} #{criterion.value} and #{criterion.secondValue}
                when>
                <when test="criterion.listValue">
                  and ${criterion.condition}
                  <foreach close=")" collection="criterion.value" item="listItem" open="(" separator=",">
                    #{listItem}
                  foreach>
                when>
              choose>
            foreach>
          trim>
        if>
      foreach>
    where>
  sql>
  <sql id="Base_Column_List">
    account, phone, password, name, school, role, avatar
  sql>
  <select id="selectByExample" parameterType="com.maven.ssm.bean.UserInfoExample" resultMap="BaseResultMap">
    select
    <if test="distinct">
      distinct
    if>
    <include refid="Base_Column_List" />
    from userinfo
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    if>
    <if test="orderByClause != null">
      order by ${orderByClause}
    if>
  select>
  <select id="selectByPrimaryKey" parameterType="java.lang.String" resultMap="BaseResultMap">
    select 
    <include refid="Base_Column_List" />
    from userinfo
    where account = #{account,jdbcType=VARCHAR}
  select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.String">
    delete from userinfo
    where account = #{account,jdbcType=VARCHAR}
  delete>
  <delete id="deleteByExample" parameterType="com.maven.ssm.bean.UserInfoExample">
    delete from userinfo
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    if>
  delete>
  <insert id="insert" parameterType="com.maven.ssm.bean.UserInfo">
    insert into userinfo (account, phone, password, 
      name, school, role, 
      avatar)
    values (#{account,jdbcType=VARCHAR}, #{phone,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, 
      #{name,jdbcType=VARCHAR}, #{school,jdbcType=VARCHAR}, #{role,jdbcType=INTEGER}, 
      #{avatar,jdbcType=VARCHAR})
  insert>
  <insert id="insertSelective" parameterType="com.maven.ssm.bean.UserInfo">
    insert into userinfo
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="account != null">
        account,
      if>
      <if test="phone != null">
        phone,
      if>
      <if test="password != null">
        password,
      if>
      <if test="name != null">
        name,
      if>
      <if test="school != null">
        school,
      if>
      <if test="role != null">
        role,
      if>
      <if test="avatar != null">
        avatar,
      if>
    trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="account != null">
        #{account,jdbcType=VARCHAR},
      if>
      <if test="phone != null">
        #{phone,jdbcType=VARCHAR},
      if>
      <if test="password != null">
        #{password,jdbcType=VARCHAR},
      if>
      <if test="name != null">
        #{name,jdbcType=VARCHAR},
      if>
      <if test="school != null">
        #{school,jdbcType=VARCHAR},
      if>
      <if test="role != null">
        #{role,jdbcType=INTEGER},
      if>
      <if test="avatar != null">
        #{avatar,jdbcType=VARCHAR},
      if>
    trim>
  insert>
  <select id="countByExample" parameterType="com.maven.ssm.bean.UserInfoExample" resultType="java.lang.Long">
    select count(*) from userinfo
    <if test="_parameter != null">
      <include refid="Example_Where_Clause" />
    if>
  select>
  <update id="updateByExampleSelective" parameterType="map">
    update userinfo
    <set>
      <if test="record.account != null">
        account = #{record.account,jdbcType=VARCHAR},
      if>
      <if test="record.phone != null">
        phone = #{record.phone,jdbcType=VARCHAR},
      if>
      <if test="record.password != null">
        password = #{record.password,jdbcType=VARCHAR},
      if>
      <if test="record.name != null">
        name = #{record.name,jdbcType=VARCHAR},
      if>
      <if test="record.school != null">
        school = #{record.school,jdbcType=VARCHAR},
      if>
      <if test="record.role != null">
        role = #{record.role,jdbcType=INTEGER},
      if>
      <if test="record.avatar != null">
        avatar = #{record.avatar,jdbcType=VARCHAR},
      if>
    set>
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    if>
  update>
  <update id="updateByExample" parameterType="map">
    update userinfo
    set account = #{record.account,jdbcType=VARCHAR},
      phone = #{record.phone,jdbcType=VARCHAR},
      password = #{record.password,jdbcType=VARCHAR},
      name = #{record.name,jdbcType=VARCHAR},
      school = #{record.school,jdbcType=VARCHAR},
      role = #{record.role,jdbcType=INTEGER},
      avatar = #{record.avatar,jdbcType=VARCHAR}
    <if test="_parameter != null">
      <include refid="Update_By_Example_Where_Clause" />
    if>
  update>
  <update id="updateByPrimaryKeySelective" parameterType="com.maven.ssm.bean.UserInfo">
    update userinfo
    <set>
      <if test="phone != null">
        phone = #{phone,jdbcType=VARCHAR},
      if>
      <if test="password != null">
        password = #{password,jdbcType=VARCHAR},
      if>
      <if test="name != null">
        name = #{name,jdbcType=VARCHAR},
      if>
      <if test="school != null">
        school = #{school,jdbcType=VARCHAR},
      if>
      <if test="role != null">
        role = #{role,jdbcType=INTEGER},
      if>
      <if test="avatar != null">
        avatar = #{avatar,jdbcType=VARCHAR},
      if>
    set>
    where account = #{account,jdbcType=VARCHAR}
  update>
  <update id="updateByPrimaryKey" parameterType="com.maven.ssm.bean.UserInfo">
    update userinfo
    set phone = #{phone,jdbcType=VARCHAR},
      password = #{password,jdbcType=VARCHAR},
      name = #{name,jdbcType=VARCHAR},
      school = #{school,jdbcType=VARCHAR},
      role = #{role,jdbcType=INTEGER},
      avatar = #{avatar,jdbcType=VARCHAR}
    where account = #{account,jdbcType=VARCHAR}
  update>
mapper>

Step5 测试一下Mapper

现在,测试一下看看xml实现文件是否可用,这里用插入一条数据才判断

测试之前,先记录一下数据库

在com.maven.ssm.test包下创建MapperTest.java文件,代码如下:

package com.maven.ssm.test;

import com.maven.ssm.bean.UserInfo;
import com.maven.ssm.dao.UserInfoMapper;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:applicationContext.xml"})
public class MapperTest {

    @Autowired
    UserInfoMapper userInfoMapper;

    @Test
    public void insertUserTest(){
        UserInfo userInfo = new UserInfo();
        userInfo.setAccount("11111111");
        userInfo.setPhone("15668055238");
        userInfo.setPassword("q123123");
        userInfo.setName("TestName");
        userInfo.setSchool("JustGuess");
        userInfo.setRole(0);
        int result = userInfoMapper.insertSelective(userInfo);
        if (result>0){
            System.out.println("insert user success!");
        } else {
            System.out.println("insert user failed!");
        }
    }
}

运行结果如下:

1.控制台输出结果:

2.数据库表中数据的变化:

Over

有问题请在留言中给出

That’s all,thank you.