解决办法:
1:建自己的Mapper.java接口,目录和mybatis生成的mapper.java相同。先不定义方法
2:见一个自己的mapper xml,和mybatis生成的mapper xml放在一个目录即可。 namespace写自己Mapper.java的全类名,然后写<select>,这里引用mybatis生成的mapper.xml中的Base_Column_List和BaseResultMap,只要写全名即可,就是:com.xxx.xx.XxxMapper.Base_Column_List和com.xxx.xx.XxxMapper.BaseResultMap.
3:补充Mapper java中方法,方法名和<select>的id相同。
PS:
自定义的Mapper.xml和Mapper.java可以不和mybatis自动生成的在一个目录。
mybatis-generator默认是不产生分页语句的。需要加个插件。
参考:http://www.cnblogs.com/iamcui/p/4788910.html
https://github.com/reedF/rmi-demo/blob/master/src/main/java/org/mybatis/generator/plugin/PaginationMysqlPlugin.java
import java.util.List; import org.mybatis.generator.api.CommentGenerator; import org.mybatis.generator.api.IntrospectedTable; import org.mybatis.generator.api.PluginAdapter; import org.mybatis.generator.api.ShellRunner; import org.mybatis.generator.api.dom.java.Field; import org.mybatis.generator.api.dom.java.FullyQualifiedJavaType; import org.mybatis.generator.api.dom.java.JavaVisibility; import org.mybatis.generator.api.dom.java.Method; import org.mybatis.generator.api.dom.java.Parameter; import org.mybatis.generator.api.dom.java.TopLevelClass; import org.mybatis.generator.api.dom.xml.Attribute; import org.mybatis.generator.api.dom.xml.TextElement; import org.mybatis.generator.api.dom.xml.XmlElement; /** * <pre> * add pagination using mysql limit. * This class is only used in ibator code generator. * </pre> */ public class PaginationMysqlPlugin extends PluginAdapter { @Override public boolean modelExampleClassGenerated(TopLevelClass topLevelClass, IntrospectedTable introspectedTable) { // add field, getter, setter for limit clause addLimit(topLevelClass, introspectedTable, "offset"); addLimit(topLevelClass, introspectedTable, "limit"); return super.modelExampleClassGenerated(topLevelClass, introspectedTable); } @Override public boolean sqlMapSelectByExampleWithoutBLOBsElementGenerated( XmlElement element, IntrospectedTable introspectedTable) { // XmlElement isParameterPresenteElemen = (XmlElement) element // .getElements().get(element.getElements().size() - 1); // XmlElement isNotNullElement = new XmlElement("isGreaterEqual"); //$NON-NLS-1$ // isNotNullElement.addAttribute(new Attribute("property", "limitStart")); //$NON-NLS-1$ //$NON-NLS-2$ // isNotNullElement.addAttribute(new Attribute("compareValue", "0")); //$NON-NLS-1$ //$NON-NLS-2$ XmlElement isNotNullElement = new XmlElement("if"); isNotNullElement.addAttribute(new Attribute("test", "limit >= 0")); isNotNullElement.addElement(new TextElement( " limit ${offset} , ${limit}")); // isParameterPresenteElemen.addElement(isNotNullElement); element.addElement(isNotNullElement); return super.sqlMapUpdateByExampleWithoutBLOBsElementGenerated(element, introspectedTable); } private void addLimit(TopLevelClass topLevelClass, IntrospectedTable introspectedTable, String name) { CommentGenerator commentGenerator = context.getCommentGenerator(); Field field = new Field(); field.setVisibility(JavaVisibility.PROTECTED); field.setType(FullyQualifiedJavaType.getIntInstance()); field.setName(name); field.setInitializationString("-1"); commentGenerator.addFieldComment(field, introspectedTable); topLevelClass.addField(field); char c = name.charAt(0); String camel = Character.toUpperCase(c) + name.substring(1); Method method = new Method(); method.setVisibility(JavaVisibility.PUBLIC); method.setName("set" + camel); method.addParameter(new Parameter(FullyQualifiedJavaType .getIntInstance(), name)); method.addBodyLine("this." + name + "=" + name + ";"); commentGenerator.addGeneralMethodComment(method, introspectedTable); topLevelClass.addMethod(method); method = new Method(); method.setVisibility(JavaVisibility.PUBLIC); method.setReturnType(FullyQualifiedJavaType.getIntInstance()); method.setName("get" + camel); method.addBodyLine("return " + name + ";"); commentGenerator.addGeneralMethodComment(method, introspectedTable); topLevelClass.addMethod(method); } /** * This plugin is always valid - no properties are required */ public boolean validate(List<String> warnings) { return true; } public static void generate() { String config = PaginationMysqlPlugin.class.getClassLoader() .getResource("generatorConfig.xml").getFile(); String[] arg = { "-configfile", config, "-overwrite" }; ShellRunner.main(arg); } public static void main(String[] args) { generate(); } }
原代码是用limitStart和limitEnd2个参数,不符合正常习惯,这里改成offset和limit.
注意offset参数不能为空。