Mybatis自己主动生成代码
林炳文Evankaka原创作品。
转载请注明出处http://blog.csdn.net/evankaka
摘要：本文将简要介绍如何利用Mybatis Generator自己主动生成Mybatis的相关代码，Mybatis Generator是一个很好用的工具，使用它能够大大节省开发的时间，并降低代码的编写量。
一、构建一个环境
1. 首先创建一个表：
CREATE TABLE
t_user
(
USER_ID INT NOT NULL AUTO_INCREMENT,
USER_NAME CHAR(30) NOT NULL,
USER_PASSWORD CHAR(10) NOT NULL,
USER_EMAIL CHAR(30) NOT NULL,
PRIMARY KEY (USER_ID)
)
ENGINE=InnoDB DEFAULT CHARSET=utf8;2. 在 Mybatis 主页 http://code.google.com/p/mybatis/ 上下载 Mybatis mybatis-generator-core 或者在这里下载：http://download.csdn.net/detail/evankaka/8926999
二、xml文件编写
1、新建一个project。然后新建例如以下包。都是空的
2、然后新建generator.xmll文件
内容例如以下：
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <!-- classPathEntry:数据库的JDBC驱动的jar包地址 --> <classPathEntry location="D:\Java\Jar\mysql-connector-java-5.1.22\mysql-connector-java-5.1.22-bin.jar" /> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <!-- 抑制警告 --> <property name="suppressTypeWarnings" value="true" /> <!-- 是否去除自己主动生成的凝视 true：是 ： false:否 --> <property name="suppressAllComments" value="false" /> <!-- 是否生成凝视代时间戳--> <property name="suppressDate" value="true" /> </commentGenerator> <!--数据库连接的信息：驱动类、连接地址、username、密码 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost/learning" userId="root" password="christmas258@"> </jdbcConnection> <!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer true。把JDBC DECIMAL 和 NUMERIC 类型解析为java.math.BigDecimal --> <!-- <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> --> <!--生成Model类存放位置 --> <javaModelGenerator targetPackage="com.lin.domain" targetProject="D:\lunaJee-workspace\MyBatisLearningChapter7\src"> <!-- 是否在当前路径下新加一层schema,eg：fase路径com.oop.eksp.user.model。 true:com.oop.eksp.user.model.[schemaName] --> <property name="enableSubPackages" value="false" /> <!-- 是否针对string类型的字段在set的时候进行trim调用 --> <property name="trimStrings" value="true" /> </javaModelGenerator> <!--生成映射文件存放位置 --> <sqlMapGenerator targetPackage="com.lin.mapper" targetProject="D:\lunaJee-workspace\MyBatisLearningChapter7\src"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <!--生成Dao类存放位置 --> <javaClientGenerator type="XMLMAPPER" targetPackage="com.lin.dao" targetProject="D:\lunaJee-workspace\MyBatisLearningChapter7\src"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <!-- tableName:用于自己主动生成代码的数据库表；domainObjectName:相应于数据库表的javaBean类名 --> <table schema="general" tableName="T_USER" domainObjectName="User"> <!--domain字段的命名规则。false:默觉得驼峰命名 true:按数据库真实命名 --> <property name="useActualColumnNames" value="false"/> <!-- 忽略列，不生成bean 字段 --> <!-- <ignoreColumn column="FRED" /> --> <!-- 指定列的java数据类型 --> <!-- <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> --> </table> </context> </generatorConfiguration>
三、自己主动代码生成
自己主动代码生成有4种方法
1、直接cmd下命令行生成
命令例如以下：java -jar 电脑上mybatis-generator-core-1.3.0.jar的绝对路径 -configfile 电脑上generator.xml的绝对路径，这里的generator.xml不一定要放在project的src文件里。
如我的这个项目就是：
执行的结果例如以下：
然后在eclipse中刷新一下：结果出来了
看看各个文件
（1）User.java
package com.lin.domain;
public class User {
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database column t_user.USER_ID
*
* @mbggenerated
*/
private Integer userId;
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database column t_user.USER_NAME
*
* @mbggenerated
*/
private String userName;
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database column t_user.USER_PASSWORD
*
* @mbggenerated
*/
private String userPassword;
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database column t_user.USER_EMAIL
*
* @mbggenerated
*/
private String userEmail;
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column t_user.USER_ID
*
* @return the value of t_user.USER_ID
*
* @mbggenerated
*/
public Integer getUserId() {
return userId;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column t_user.USER_ID
*
* @param userId the value for t_user.USER_ID
*
* @mbggenerated
*/
public void setUserId(Integer userId) {
this.userId = userId;
}
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column t_user.USER_NAME
*
* @return the value of t_user.USER_NAME
*
* @mbggenerated
*/
public String getUserName() {
return userName;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column t_user.USER_NAME
*
* @param userName the value for t_user.USER_NAME
*
* @mbggenerated
*/
public void setUserName(String userName) {
this.userName = userName == null ? null : userName.trim();
}
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column t_user.USER_PASSWORD
*
* @return the value of t_user.USER_PASSWORD
*
* @mbggenerated
*/
public String getUserPassword() {
return userPassword;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column t_user.USER_PASSWORD
*
* @param userPassword the value for t_user.USER_PASSWORD
*
* @mbggenerated
*/
public void setUserPassword(String userPassword) {
this.userPassword = userPassword == null ?
null : userPassword.trim();
}
/**
* This method was generated by MyBatis Generator.
* This method returns the value of the database column t_user.USER_EMAIL
*
* @return the value of t_user.USER_EMAIL
*
* @mbggenerated
*/
public String getUserEmail() {
return userEmail;
}
/**
* This method was generated by MyBatis Generator.
* This method sets the value of the database column t_user.USER_EMAIL
*
* @param userEmail the value for t_user.USER_EMAIL
*
* @mbggenerated
*/
public void setUserEmail(String userEmail) {
this.userEmail = userEmail == null ? null : userEmail.trim();
}
}
UserExample.java这个文件能够控制是否生成
package com.lin.domain;
import java.util.ArrayList;
import java.util.List;
public class UserExample {
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database table t_user
*
* @mbggenerated
*/
protected String orderByClause;
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database table t_user
*
* @mbggenerated
*/
protected boolean distinct;
/**
* This field was generated by MyBatis Generator.
* This field corresponds to the database table t_user
*
* @mbggenerated
*/
protected List<Criteria> oredCriteria;
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public UserExample() {
oredCriteria = new ArrayList<Criteria>();
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public void setOrderByClause(String orderByClause) {
this.orderByClause = orderByClause;
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public String getOrderByClause() {
return orderByClause;
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public void setDistinct(boolean distinct) {
this.distinct = distinct;
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public boolean isDistinct() {
return distinct;
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public List<Criteria> getOredCriteria() {
return oredCriteria;
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public void or(Criteria criteria) {
oredCriteria.add(criteria);
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public Criteria or() {
Criteria criteria = createCriteriaInternal();
oredCriteria.add(criteria);
return criteria;
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public Criteria createCriteria() {
Criteria criteria = createCriteriaInternal();
if (oredCriteria.size() == 0) {
oredCriteria.add(criteria);
}
return criteria;
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
protected Criteria createCriteriaInternal() {
Criteria criteria = new Criteria();
return criteria;
}
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
public void clear() {
oredCriteria.clear();
orderByClause = null;
distinct = false;
}
/**
* This class was generated by MyBatis Generator.
* This class corresponds to the database table t_user
*
* @mbggenerated
*/
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> 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 andUserIdIsNull() {
addCriterion("USER_ID is null");
return (Criteria) this;
}
public Criteria andUserIdIsNotNull() {
addCriterion("USER_ID is not null");
return (Criteria) this;
}
public Criteria andUserIdEqualTo(Integer value) {
addCriterion("USER_ID =", value, "userId");
return (Criteria) this;
}
public Criteria andUserIdNotEqualTo(Integer value) {
addCriterion("USER_ID <>", value, "userId");
return (Criteria) this;
}
public Criteria andUserIdGreaterThan(Integer value) {
addCriterion("USER_ID >", value, "userId");
return (Criteria) this;
}
public Criteria andUserIdGreaterThanOrEqualTo(Integer value) {
addCriterion("USER_ID >=", value, "userId");
return (Criteria) this;
}
public Criteria andUserIdLessThan(Integer value) {
addCriterion("USER_ID <", value, "userId");
return (Criteria) this;
}
public Criteria andUserIdLessThanOrEqualTo(Integer value) {
addCriterion("USER_ID <=", value, "userId");
return (Criteria) this;
}
public Criteria andUserIdIn(List<Integer> values) {
addCriterion("USER_ID in", values, "userId");
return (Criteria) this;
}
public Criteria andUserIdNotIn(List<Integer> values) {
addCriterion("USER_ID not in", values, "userId");
return (Criteria) this;
}
public Criteria andUserIdBetween(Integer value1, Integer value2) {
addCriterion("USER_ID between", value1, value2, "userId");
return (Criteria) this;
}
public Criteria andUserIdNotBetween(Integer value1, Integer value2) {
addCriterion("USER_ID not between", value1, value2, "userId");
return (Criteria) this;
}
public Criteria andUserNameIsNull() {
addCriterion("USER_NAME is null");
return (Criteria) this;
}
public Criteria andUserNameIsNotNull() {
addCriterion("USER_NAME is not null");
return (Criteria) this;
}
public Criteria andUserNameEqualTo(String value) {
addCriterion("USER_NAME =", value, "userName");
return (Criteria) this;
}
public Criteria andUserNameNotEqualTo(String value) {
addCriterion("USER_NAME <>", value, "userName");
return (Criteria) this;
}
public Criteria andUserNameGreaterThan(String value) {
addCriterion("USER_NAME >", value, "userName");
return (Criteria) this;
}
public Criteria andUserNameGreaterThanOrEqualTo(String value) {
addCriterion("USER_NAME >=", value, "userName");
return (Criteria) this;
}
public Criteria andUserNameLessThan(String value) {
addCriterion("USER_NAME <", value, "userName");
return (Criteria) this;
}
public Criteria andUserNameLessThanOrEqualTo(String value) {
addCriterion("USER_NAME <=", value, "userName");
return (Criteria) this;
}
public Criteria andUserNameLike(String value) {
addCriterion("USER_NAME like", value, "userName");
return (Criteria) this;
}
public Criteria andUserNameNotLike(String value) {
addCriterion("USER_NAME not like", value, "userName");
return (Criteria) this;
}
public Criteria andUserNameIn(List<String> values) {
addCriterion("USER_NAME in", values, "userName");
return (Criteria) this;
}
public Criteria andUserNameNotIn(List<String> values) {
addCriterion("USER_NAME not in", values, "userName");
return (Criteria) this;
}
public Criteria andUserNameBetween(String value1, String value2) {
addCriterion("USER_NAME between", value1, value2, "userName");
return (Criteria) this;
}
public Criteria andUserNameNotBetween(String value1, String value2) {
addCriterion("USER_NAME not between", value1, value2, "userName");
return (Criteria) this;
}
public Criteria andUserPasswordIsNull() {
addCriterion("USER_PASSWORD is null");
return (Criteria) this;
}
public Criteria andUserPasswordIsNotNull() {
addCriterion("USER_PASSWORD is not null");
return (Criteria) this;
}
public Criteria andUserPasswordEqualTo(String value) {
addCriterion("USER_PASSWORD =", value, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordNotEqualTo(String value) {
addCriterion("USER_PASSWORD <>", value, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordGreaterThan(String value) {
addCriterion("USER_PASSWORD >", value, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordGreaterThanOrEqualTo(String value) {
addCriterion("USER_PASSWORD >=", value, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordLessThan(String value) {
addCriterion("USER_PASSWORD <", value, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordLessThanOrEqualTo(String value) {
addCriterion("USER_PASSWORD <=", value, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordLike(String value) {
addCriterion("USER_PASSWORD like", value, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordNotLike(String value) {
addCriterion("USER_PASSWORD not like", value, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordIn(List<String> values) {
addCriterion("USER_PASSWORD in", values, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordNotIn(List<String> values) {
addCriterion("USER_PASSWORD not in", values, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordBetween(String value1, String value2) {
addCriterion("USER_PASSWORD between", value1, value2, "userPassword");
return (Criteria) this;
}
public Criteria andUserPasswordNotBetween(String value1, String value2) {
addCriterion("USER_PASSWORD not between", value1, value2, "userPassword");
return (Criteria) this;
}
public Criteria andUserEmailIsNull() {
addCriterion("USER_EMAIL is null");
return (Criteria) this;
}
public Criteria andUserEmailIsNotNull() {
addCriterion("USER_EMAIL is not null");
return (Criteria) this;
}
public Criteria andUserEmailEqualTo(String value) {
addCriterion("USER_EMAIL =", value, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailNotEqualTo(String value) {
addCriterion("USER_EMAIL <>", value, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailGreaterThan(String value) {
addCriterion("USER_EMAIL >", value, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailGreaterThanOrEqualTo(String value) {
addCriterion("USER_EMAIL >=", value, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailLessThan(String value) {
addCriterion("USER_EMAIL <", value, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailLessThanOrEqualTo(String value) {
addCriterion("USER_EMAIL <=", value, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailLike(String value) {
addCriterion("USER_EMAIL like", value, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailNotLike(String value) {
addCriterion("USER_EMAIL not like", value, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailIn(List<String> values) {
addCriterion("USER_EMAIL in", values, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailNotIn(List<String> values) {
addCriterion("USER_EMAIL not in", values, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailBetween(String value1, String value2) {
addCriterion("USER_EMAIL between", value1, value2, "userEmail");
return (Criteria) this;
}
public Criteria andUserEmailNotBetween(String value1, String value2) {
addCriterion("USER_EMAIL not between", value1, value2, "userEmail");
return (Criteria) this;
}
}
/**
* This class was generated by MyBatis Generator.
* This class corresponds to the database table t_user
*
* @mbggenerated do_not_delete_during_merge
*/
public static class Criteria extends GeneratedCriteria {
protected Criteria() {
super();
}
}
/**
* This class was generated by MyBatis Generator.
* This class corresponds to the database table t_user
*
* @mbggenerated
*/
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;
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;
}
protected Criterion(String condition) {
super();
this.condition = condition;
this.noValue = true;
}
protected Criterion(String condition, Object value) {
super();
this.condition = condition;
this.value = value;
if (value instanceof List<?>) {
this.listValue = true;
} else {
this.singleValue = true;
}
}
protected Criterion(String condition, Object value, Object secondValue) {
super();
this.condition = condition;
this.value = value;
this.secondValue = secondValue;
this.betweenValue = true;
}
}
}
（2）dao层文件。它自己主动取名为UserMapper.java，能够自己手动写成UserDao.java
package com.lin.dao;
import com.lin.domain.User;
import com.lin.domain.UserExample;
import java.util.List;
import org.apache.ibatis.annotations.Param;
public interface UserMapper {
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
int countByExample(UserExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
int deleteByExample(UserExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
int deleteByPrimaryKey(Integer userId);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
int insert(User record);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
int insertSelective(User record);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
List<User> selectByExample(UserExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
User selectByPrimaryKey(Integer userId);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
int updateByExampleSelective(@Param("record") User record, @Param("example") UserExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
int updateByExample(@Param("record") User record, @Param("example") UserExample example);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
int updateByPrimaryKeySelective(User record);
/**
* This method was generated by MyBatis Generator.
* This method corresponds to the database table t_user
*
* @mbggenerated
*/
int updateByPrimaryKey(User record);
}(3)Mapper.xml文件：
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > <mapper namespace="com.lin.dao.UserMapper" > <resultMap id="BaseResultMap" type="com.lin.domain.User" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> <id column="USER_ID" property="userId" jdbcType="INTEGER" /> <result column="USER_NAME" property="userName" jdbcType="CHAR" /> <result column="USER_PASSWORD" property="userPassword" jdbcType="CHAR" /> <result column="USER_EMAIL" property="userEmail" jdbcType="CHAR" /> </resultMap> <sql id="Example_Where_Clause" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> <where > <foreach collection="oredCriteria" item="criteria" separator="or" > <if test="criteria.valid" > <trim prefix="(" suffix=")" prefixOverrides="and" > <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 collection="criterion.value" item="listItem" open="(" close=")" separator="," > #{listItem} </foreach> </when> </choose> </foreach> </trim> </if> </foreach> </where> </sql> <sql id="Update_By_Example_Where_Clause" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> <where > <foreach collection="example.oredCriteria" item="criteria" separator="or" > <if test="criteria.valid" > <trim prefix="(" suffix=")" prefixOverrides="and" > <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 collection="criterion.value" item="listItem" open="(" close=")" separator="," > #{listItem} </foreach> </when> </choose> </foreach> </trim> </if> </foreach> </where> </sql> <sql id="Base_Column_List" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL </sql> <select id="selectByExample" resultMap="BaseResultMap" parameterType="com.lin.domain.UserExample" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> select <if test="distinct" > distinct </if> <include refid="Base_Column_List" /> from t_user <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> <if test="orderByClause != null" > order by ${orderByClause} </if> </select> <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> select <include refid="Base_Column_List" /> from t_user where USER_ID = #{userId,jdbcType=INTEGER} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> delete from t_user where USER_ID = #{userId,jdbcType=INTEGER} </delete> <delete id="deleteByExample" parameterType="com.lin.domain.UserExample" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> delete from t_user <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> </delete> <insert id="insert" parameterType="com.lin.domain.User" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> insert into t_user (USER_ID, USER_NAME, USER_PASSWORD, USER_EMAIL) values (#{userId,jdbcType=INTEGER}, #{userName,jdbcType=CHAR}, #{userPassword,jdbcType=CHAR}, #{userEmail,jdbcType=CHAR}) </insert> <insert id="insertSelective" parameterType="com.lin.domain.User" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> insert into t_user <trim prefix="(" suffix=")" suffixOverrides="," > <if test="userId != null" > USER_ID, </if> <if test="userName != null" > USER_NAME, </if> <if test="userPassword != null" > USER_PASSWORD, </if> <if test="userEmail != null" > USER_EMAIL, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="userId != null" > #{userId,jdbcType=INTEGER}, </if> <if test="userName != null" > #{userName,jdbcType=CHAR}, </if> <if test="userPassword != null" > #{userPassword,jdbcType=CHAR}, </if> <if test="userEmail != null" > #{userEmail,jdbcType=CHAR}, </if> </trim> </insert> <select id="countByExample" parameterType="com.lin.domain.UserExample" resultType="java.lang.Integer" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> select count(*) from t_user <if test="_parameter != null" > <include refid="Example_Where_Clause" /> </if> </select> <update id="updateByExampleSelective" parameterType="map" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> update t_user <set > <if test="record.userId != null" > USER_ID = #{record.userId,jdbcType=INTEGER}, </if> <if test="record.userName != null" > USER_NAME = #{record.userName,jdbcType=CHAR}, </if> <if test="record.userPassword != null" > USER_PASSWORD = #{record.userPassword,jdbcType=CHAR}, </if> <if test="record.userEmail != null" > USER_EMAIL = #{record.userEmail,jdbcType=CHAR}, </if> </set> <if test="_parameter != null" > <include refid="Update_By_Example_Where_Clause" /> </if> </update> <update id="updateByExample" parameterType="map" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> update t_user set USER_ID = #{record.userId,jdbcType=INTEGER}, USER_NAME = #{record.userName,jdbcType=CHAR}, USER_PASSWORD = #{record.userPassword,jdbcType=CHAR}, USER_EMAIL = #{record.userEmail,jdbcType=CHAR} <if test="_parameter != null" > <include refid="Update_By_Example_Where_Clause" /> </if> </update> <update id="updateByPrimaryKeySelective" parameterType="com.lin.domain.User" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> update t_user <set > <if test="userName != null" > USER_NAME = #{userName,jdbcType=CHAR}, </if> <if test="userPassword != null" > USER_PASSWORD = #{userPassword,jdbcType=CHAR}, </if> <if test="userEmail != null" > USER_EMAIL = #{userEmail,jdbcType=CHAR}, </if> </set> where USER_ID = #{userId,jdbcType=INTEGER} </update> <update id="updateByPrimaryKey" parameterType="com.lin.domain.User" > <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> update t_user set USER_NAME = #{userName,jdbcType=CHAR}, USER_PASSWORD = #{userPassword,jdbcType=CHAR}, USER_EMAIL = #{userEmail,jdbcType=CHAR} where USER_ID = #{userId,jdbcType=INTEGER} </update> </mapper>
这样就好了，serivce层的文件自己再去写写就好了。
假设不想要UserExample文件怎么办呢？
那就把
<table schema="general" tableName="T_USER" domainObjectName="User">
<!--domain字段的命名规则。false:默觉得驼峰命名 true:按数据库真实命名 -->
<property name="useActualColumnNames" value="false"/>
</table>换成： <table schema="general" tableName="T_USER" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false"
enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false">
<!--domain字段的命名规则，false:默觉得驼峰命名 true:按数据库真实命名 -->
<property name="useActualColumnNames" value="false"/>
</table>这样就能够了2、java代码读取xml文件生成
首先要导入例如以下的包：
然后在project里写一个文件例如以下：
package Test;
import java.io.File;
import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.exception.InvalidConfigurationException;
import org.mybatis.generator.exception.XMLParserException;
import org.mybatis.generator.internal.DefaultShellCallback;
public class BuildFile {
public static void main(String[] args) throws InvalidConfigurationException, IOException, XMLParserException, SQLException, InterruptedException {
List<String> warnings = new ArrayList<String>();
boolean overwrite = true;
File configFile = new File("D:\\lunaJee-workspace\\MyBatisLearningChapter7\\src\\generator.xml"); //输入绝对路径
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config=null;
config = cp.parseConfiguration(configFile);
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
MyBatisGenerator myBatisGenerator = null;
myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
myBatisGenerator.generate(null);
}
}
然后执行。再刷新下就能够了
这里说一下。generator.xml文件也是能够随便放的，我这里为了方便。把它和整个project放在一起了
3、eclipse插入mybatis generator生成
待续~~
4、maven生成
待续~~
