package object;
import java.lang.reflect.Field;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.jdbc.core.RowMapper;
public class ObjectRowMapper implements RowMapper{
private Class className;
public ObjectRowMapper(Class className){
this.className = className;
}
public Object mapRow(ResultSet rs, int rowNum) throws SQLException {
Object nt = new Object();
Field[] fields = className.getDeclaredFields();
try {
nt = className.newInstance();
for (Field field : fields) {
//如果结果中没有改field项则跳过
try {
rs.findColumn(field.getName());
} catch (Exception e) {
continue;
}
//修改相应filed的权限
boolean accessFlag = field.isAccessible();
field.setAccessible(true);
String value = rs.getString(field.getName());
value = value==null?"":value;
setFieldValue(nt, field, value);
//恢复相应field的权限
field.setAccessible(accessFlag);
}
} catch (Exception e) {
e.printStackTrace();
}
return nt;
}
public static void setFieldValue(Object form, Field field, String value) {
String elemType = field.getType().toString();
if (elemType.indexOf("boolean") != -1||elemType.indexOf("Boolean") != -1) {
try {
field.set(form, Boolean.valueOf(value));
} catch (IllegalAccessException e) {
e.printStackTrace();
}
} else if (elemType.indexOf("byte") != -1||elemType.indexOf("Byte") != -1) {
try {
field.set(form, Byte.valueOf(value));
} catch (IllegalAccessException e) {
e.printStackTrace();
}
} else if (elemType.indexOf("char") != -1||elemType.indexOf("Character") != -1) {
try {
field.set(form, Character.valueOf(value.charAt(0)));
} catch (IllegalAccessException e) {
e.printStackTrace();
}
} else if (elemType.indexOf("double") != -1||elemType.indexOf("Double") != -1) {
try {
field.set(form, Double.valueOf(value));
} catch (IllegalAccessException e) {
e.printStackTrace();
}
} else if (elemType.indexOf("float") != -1||elemType.indexOf("Float") != -1) {
try {
field.set(form, Float.valueOf(value));
} catch (IllegalAccessException e) {
e.printStackTrace();
}
} else if (elemType.indexOf("int") != -1||elemType.indexOf("Integer") != -1) {
try {
field.set(form, Integer.valueOf(value));
} catch (IllegalAccessException e) {
e.printStackTrace();
}
} else if (elemType.indexOf("long") != -1||elemType.indexOf("Long") != -1) {
try {
field.set(form, Long.valueOf(value));
} catch (IllegalAccessException e) {
e.printStackTrace();
}
} else if (elemType.indexOf("short") != -1||elemType.indexOf("Short") != -1) {
try {
field.set(form, Short.valueOf(value));
} catch (IllegalAccessException e) {
e.printStackTrace();
}
} else {
try {
field.set(form, (Object) value);
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
}
}